[PATCH 3.12 017/181] vlan: more careful checksum features handling

[Jiri Slaby]

=46rom: Michal Kube=C4=8Dek <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit da08143b85203b581f4a6461b149186b0e9592df upstream.

When combining real_dev's features and vlan_features, simple
bitwise AND is used. This doesn't work well for checksum
offloading features as if one set has NETIF_F_HW_CSUM and the
other NETIF_F_IP_CSUM and/or NETIF_F_IPV6_CSUM, we end up with
no checksum offloading. However, from the logical point of view
(how can_checksum_protocol() works), NETIF_F_HW_CSUM contains
the functionality of NETIF_F_IP_CSUM and NETIF_F_IPV6_CSUM so
that the result should be IP/IPV6.

Add helper function netdev_intersect_features() implementing
this logic and use it in vlan_dev_fix_features().

Signed-off-by: Michal Kubecek <***@suse.cz>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/linux/netdevice.h | 14 ++++++++++++++
net/8021q/vlan_dev.c | 4 ++--
2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 9f2a0cbc7d06..51bfd7a68272 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2892,6 +2892,20 @@ extern const char *netdev_drivername(const struc=
t net_device *dev);
=20
extern void linkwatch_run_queue(void);
=20
+static inline netdev_features_t netdev_intersect_features(netdev_featu=
res_t f1,
+ netdev_features_t f2)
+{
+ if (f1 & NETIF_F_GEN_CSUM)
+ f1 |=3D (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+ if (f2 & NETIF_F_GEN_CSUM)
+ f2 |=3D (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+ f1 &=3D f2;
+ if (f1 & NETIF_F_GEN_CSUM)
+ f1 &=3D ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+
+ return f1;
+}
+
static inline netdev_features_t netdev_get_wanted_features(
struct net_device *dev)
{
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 1b89bc7468de..0c21361fab30 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -694,9 +694,9 @@ static netdev_features_t vlan_dev_fix_features(stru=
ct net_device *dev,
struct net_device *real_dev =3D vlan_dev_priv(dev)->real_dev;
netdev_features_t old_features =3D features;
=20
- features &=3D real_dev->vlan_features;
+ features =3D netdev_intersect_features(features, real_dev->vlan_featu=
res);
features |=3D NETIF_F_RXCSUM;
- features &=3D real_dev->features;
+ features =3D netdev_intersect_features(features, real_dev->features);
=20
features |=3D old_features & NETIF_F_SOFT_FEATURES;
features |=3D NETIF_F_LLTX;
--=20
2.0.0

[Jiri Slaby]

From: Jiang Liu <***@linux.intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 88390996c95b879ba365888199b45ace3f5ca80b upstream.

Close avn_cstates array with correct marker to avoid overflow
in function intel_idle_cpu_init().

[rjw: The problem was introduced when commit 22e580d07f65 was merged
on top of eba682a5aeb6 (intel_idle: shrink states tables).]

Fixes: 22e580d07f65 (intel_idle: Fixed C6 state on Avoton/Rangeley processors)
Signed-off-by: Jiang Liu <***@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/idle/intel_idle.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 53235814ea0f..97f4e807c862 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -329,7 +329,7 @@ static struct cpuidle_state atom_cstates[CPUIDLE_STATE_MAX] = {
{
.enter = NULL }
};
-static struct cpuidle_state avn_cstates[] __initdata = {
+static struct cpuidle_state avn_cstates[] = {
{
.name = "C1-AVN",
.desc = "MWAIT 0x00",
@@ -344,6 +344,8 @@ static struct cpuidle_state avn_cstates[] __initdata = {
.exit_latency = 15,
.target_residency = 45,
.enter = &intel_idle },
+ {
+ .enter = NULL }
};

/**

[Jiri Slaby]

From: Dan Carpenter <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 9dbd79aeb9842144d9a114a979a12c0949ee11eb upstream.

The ->SupportedRates[] array has NDIS_802_11_LENGTH_RATES_EX (16)
elements. Since "ie_len" comes from then network and can go up to 255
then it means we should add a range check to prevent memory corruption.

Fixes: d6846af679e0 ('staging: r8188eu: Add files for new driver - part 7')
Signed-off-by: Dan Carpenter <***@oracle.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/staging/rtl8188eu/core/rtw_wlan_util.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
index 8018edd3d42e..ce638d1723e3 100644
--- a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
+++ b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
@@ -1607,13 +1607,18 @@ int update_sta_support_rate(struct adapter *padapter, u8 *pvar_ie, uint var_ie_l
pIE = (struct ndis_802_11_var_ie *)rtw_get_ie(pvar_ie, _SUPPORTEDRATES_IE_, &ie_len, var_ie_len);
if (pIE == NULL)
return _FAIL;
+ if (ie_len > NDIS_802_11_LENGTH_RATES_EX)
+ return _FAIL;

memcpy(pmlmeinfo->FW_sta_info[cam_idx].SupportedRates, pIE->data, ie_len);
supportRateNum = ie_len;

pIE = (struct ndis_802_11_var_ie *)rtw_get_ie(pvar_ie, _EXT_SUPPORTEDRATES_IE_, &ie_len, var_ie_len);
- if (pIE)
+ if (pIE) {
+ if (supportRateNum + ie_len > NDIS_802_11_LENGTH_RATES_EX)
+ return _FAIL;
memcpy((pmlmeinfo->FW_sta_info[cam_idx].SupportedRates + supportRateNum), pIE->data, ie_len);
+ }

return _SUCCESS;
}

[Jiri Slaby]

From: James Hogan <***@imgtec.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 7006e2dfda9adfa40251093604db76d7e44263b3 upstream.

Each MIPS KVM guest has its own copy of the KVM exception vector. This
contains the TLB refill exception handler at offset 0x000, the general
exception handler at offset 0x180, and interrupt exception handlers at
offset 0x200 in case Cause_IV=1. A common handler is copied to offset
0x2000 and offset 0x3000 is used for temporarily storing k1 during entry
from guest.

However the amount of memory allocated for this purpose is calculated as
0x200 rounded up to the next page boundary, which is insufficient if 4KB
pages are in use. This can lead to the common handler at offset 0x2000
being overwritten and infinitely recursive exceptions on the next exit
from the guest.

Increase the minimum size from 0x200 to 0x4000 to cover the full use of
the page.

Signed-off-by: James Hogan <***@imgtec.com>
Cc: Paolo Bonzini <***@redhat.com>
Cc: Gleb Natapov <***@kernel.org>
Cc: ***@vger.kernel.org
Cc: Ralf Baechle <***@linux-mips.org>
Cc: linux-***@linux-mips.org
Cc: Sanjay Lal <***@kymasys.com>
Signed-off-by: Paolo Bonzini <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/mips/kvm/kvm_mips.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index a7b044536de4..b31153969946 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -303,7 +303,7 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
if (cpu_has_veic || cpu_has_vint) {
size = 0x200 + VECTORSPACING * 64;
} else {
- size = 0x200;
+ size = 0x4000;
}

/* Save Linux EBASE */

[Jiri Slaby]

From: Felipe Balbi <***@ti.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 687ef9817df7ed960d14575b9033dde3d04631fe upstream.

so it seems like DWC3 IP doesn't clear stalls
automatically when we disable an endpoint, because
of that, we _must_ make sure stalls are cleared
before clearing the proper bit in DALEPENA register.

Reported-by: Johannes Stezenbach <***@sig21.net>
Signed-off-by: Felipe Balbi <***@ti.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/dwc3/gadget.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 02e44fcaf205..c37da0c9a076 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -586,6 +586,10 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)

dwc3_remove_requests(dwc, dep);

+ /* make sure HW endpoint isn't stalled */
+ if (dep->flags & DWC3_EP_STALL)
+ __dwc3_gadget_ep_set_halt(dep, 0);
+
reg = dwc3_readl(dwc->regs, DWC3_DALEPENA);
reg &= ~DWC3_DALEPENA_EP(dep->number);
dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);

[Jiri Slaby]

From: Huang Rui <***@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e4d58f5dcb7d7be45df8def31881ebfae99c75da upstream.

TEST 12 and TEST 24 unlinks the URB write request for N times. When
host and gadget both initialize pattern 1 (mod 63) data series to
transfer, the gadget side will complain the wrong data which is not
expected. Because in host side, usbtest doesn't fill the data buffer
as mod 63 and this patch fixed it.

[20285.488974] dwc3 dwc3.0.auto: ep1out-bulk: Transfer Not Ready
[20285.489181] dwc3 dwc3.0.auto: ep1out-bulk: reason Transfer Not Active
[20285.489423] dwc3 dwc3.0.auto: ep1out-bulk: req ffff8800aa6cb480 dma aeb50800 length 512 last
[20285.489727] dwc3 dwc3.0.auto: ep1out-bulk: cmd 'Start Transfer' params 00000000 a9eaf000 00000000
[20285.490055] dwc3 dwc3.0.auto: Command Complete --> 0
[20285.490281] dwc3 dwc3.0.auto: ep1out-bulk: Transfer Not Ready
[20285.490492] dwc3 dwc3.0.auto: ep1out-bulk: reason Transfer Active
[20285.490713] dwc3 dwc3.0.auto: ep1out-bulk: endpoint busy
[20285.490909] dwc3 dwc3.0.auto: ep1out-bulk: Transfer Complete
[20285.491117] dwc3 dwc3.0.auto: request ffff8800aa6cb480 from ep1out-bulk completed 512/512 ===> 0
[20285.491431] zero gadget: bad OUT byte, buf[1] = 0
[20285.491605] dwc3 dwc3.0.auto: ep1out-bulk: cmd 'Set Stall' params 00000000 00000000 00000000
[20285.491915] dwc3 dwc3.0.auto: Command Complete --> 0
[20285.492099] dwc3 dwc3.0.auto: queing request ffff8800aa6cb480 to ep1out-bulk length 512
[20285.492387] dwc3 dwc3.0.auto: ep1out-bulk: Transfer Not Ready
[20285.492595] dwc3 dwc3.0.auto: ep1out-bulk: reason Transfer Not Active
[20285.492830] dwc3 dwc3.0.auto: ep1out-bulk: req ffff8800aa6cb480 dma aeb51000 length 512 last
[20285.493135] dwc3 dwc3.0.auto: ep1out-bulk: cmd 'Start Transfer' params 00000000 a9eaf000 00000000
[20285.493465] dwc3 dwc3.0.auto: Command Complete --> 0

Signed-off-by: Huang Rui <***@amd.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/misc/usbtest.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index afe616b55f01..d90556eb8da5 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -1157,6 +1157,11 @@ static int unlink1(struct usbtest_dev *dev, int pipe, int size, int async)
urb->context = &completion;
urb->complete = unlink1_callback;

+ if (usb_pipeout(urb->pipe)) {
+ simple_fill_buf(urb);
+ urb->transfer_flags |= URB_ZERO_PACKET;
+ }
+
/* keep the endpoint busy. there are lots of hc/hcd-internal
* states, and testing should get to all of them over time.
*
@@ -1287,6 +1292,11 @@ static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num,
unlink_queued_callback, &ctx);
ctx.urbs[i]->transfer_dma = buf_dma;
ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+
+ if (usb_pipeout(ctx.urbs[i]->pipe)) {
+ simple_fill_buf(ctx.urbs[i]);
+ ctx.urbs[i]->transfer_flags |= URB_ZERO_PACKET;
+ }
}

/* Submit all the URBs and then unlink URBs num - 4 and num - 2. */

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 6954cc1f238199e971ec905c5cc87120806ac981 upstream.

Fix null-pointer dereference at probe when the mdio platform device is
missing (e.g. when it has been disabled in DT).

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/ethernet/ti/cpsw.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index cc3ce557e4aa..498e808391a9 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1797,6 +1797,10 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
phyid = be32_to_cpup(parp+1);
mdio = of_find_device_by_node(mdio_node);
+ if (!mdio) {
+ pr_err("Missing mdio platform device\n");
+ return -EINVAL;
+ }
snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
PHY_ID_FMT, mdio->name, phyid);

[Jiri Slaby]

From: Paul Bolle <***@tiscali.nl>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d3921a03a89acb1b9ca599590c0131c89f8737d8 upstream.

Commit d0f47ff17f29 ("ASoC: OMAP: Build config cleanup for McBSP")
removed the Kconfig symbol OMAP_MCBSP. It left two checks for
CONFIG_OMAP_MCBSP untouched.

Convert these to checks for CONFIG_SND_OMAP_SOC_MCBSP. That must be
correct, since that re-enables calls to functions that are all found in
sound/soc/omap/mcbsp.c. And that file is built only if
CONFIG_SND_OMAP_SOC_MCBSP is defined.

Fixes: d0f47ff17f29 ("ASoC: OMAP: Build config cleanup for McBSP")
Signed-off-by: Paul Bolle <***@tiscali.nl>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/staging/tidspbridge/core/dsp-clock.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/tidspbridge/core/dsp-clock.c b/drivers/staging/tidspbridge/core/dsp-clock.c
index 2f084e181d39..a1aca4416ca7 100644
--- a/drivers/staging/tidspbridge/core/dsp-clock.c
+++ b/drivers/staging/tidspbridge/core/dsp-clock.c
@@ -226,7 +226,7 @@ int dsp_clk_enable(enum dsp_clk_id clk_id)
case GPT_CLK:
status = omap_dm_timer_start(timer[clk_id - 1]);
break;
-#ifdef CONFIG_OMAP_MCBSP
+#ifdef CONFIG_SND_OMAP_SOC_MCBSP
case MCBSP_CLK:
omap_mcbsp_request(MCBSP_ID(clk_id));
omap2_mcbsp_set_clks_src(MCBSP_ID(clk_id), MCBSP_CLKS_PAD_SRC);
@@ -302,7 +302,7 @@ int dsp_clk_disable(enum dsp_clk_id clk_id)
case GPT_CLK:
status = omap_dm_timer_stop(timer[clk_id - 1]);
break;
-#ifdef CONFIG_OMAP_MCBSP
+#ifdef CONFIG_SND_OMAP_SOC_MCBSP
case MCBSP_CLK:
omap2_mcbsp_set_clks_src(MCBSP_ID(clk_id), MCBSP_CLKS_PRCM_SRC);
omap_mcbsp_free(MCBSP_ID(clk_id));

[Jiri Slaby]

From: Ursula Braun <***@de.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit f5738e2ef88070ef1372e6e718124d88e9abe4ac upstream.

When sending data through IUCV a MESSAGE COMPLETE interrupt
signals that sent data memory can be freed or reused again.
With commit f9c41a62bba3f3f7ef3541b2a025e3371bcbba97
"af_iucv: fix recvmsg by replacing skb_pull() function" the
MESSAGE COMPLETE callback iucv_callback_txdone() identifies
the wrong skb as being confirmed, which leads to data corruption.
This patch fixes the skb mapping logic in iucv_callback_txdone().

Signed-off-by: Ursula Braun <***@de.ibm.com>
Signed-off-by: Frank Blaschka <***@de.ibm.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/iucv/af_iucv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index c4b7218058b6..1465363a452b 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1829,7 +1829,7 @@ static void iucv_callback_txdone(struct iucv_path *path,
spin_lock_irqsave(&list->lock, flags);

while (list_skb != (struct sk_buff *)list) {
- if (msg->tag != IUCV_SKB_CB(list_skb)->tag) {
+ if (msg->tag == IUCV_SKB_CB(list_skb)->tag) {
this = list_skb;
break;
}

[Jiri Slaby]

From: Alan Stern <***@rowland.harvard.edu>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 32b36eeae6a859670d2939a7d6136cb5e9ed64f8 upstream.

In usbtest, tests 5 - 8 use the scatter-gather library in usbcore
without any sort of timeout. If there's a problem in the gadget or
host controller being tested, the test can hang.

This patch adds a 10-second timeout to the tests, so that they will
fail gracefully with an ETIMEDOUT error instead of hanging.

Signed-off-by: Alan Stern <***@rowland.harvard.edu>
Reported-by: Huang Rui <***@amd.com>
Tested-by: Huang Rui <***@amd.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/misc/usbtest.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index d90556eb8da5..9a1297eb1abc 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -7,7 +7,7 @@
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/mutex.h>
-
+#include <linux/timer.h>
#include <linux/usb.h>

#define SIMPLE_IO_TIMEOUT 10000 /* in milliseconds */
@@ -484,6 +484,14 @@ alloc_sglist(int nents, int max, int vary)
return sg;
}

+static void sg_timeout(unsigned long _req)
+{
+ struct usb_sg_request *req = (struct usb_sg_request *) _req;
+
+ req->status = -ETIMEDOUT;
+ usb_sg_cancel(req);
+}
+
static int perform_sglist(
struct usbtest_dev *tdev,
unsigned iterations,
@@ -495,6 +503,9 @@ static int perform_sglist(
{
struct usb_device *udev = testdev_to_usbdev(tdev);
int retval = 0;
+ struct timer_list sg_timer;
+
+ setup_timer_on_stack(&sg_timer, sg_timeout, (unsigned long) req);

while (retval == 0 && iterations-- > 0) {
retval = usb_sg_init(req, udev, pipe,
@@ -505,7 +516,10 @@ static int perform_sglist(

if (retval)
break;
+ mod_timer(&sg_timer, jiffies +
+ msecs_to_jiffies(SIMPLE_IO_TIMEOUT));
usb_sg_wait(req);
+ del_timer_sync(&sg_timer);
retval = req->status;

/* FIXME check resulting data pattern */

[Jiri Slaby]

From: Dan Carpenter <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 8bab797c6e5724a43b7666ad70860712365cdb71 upstream.

This is a static checker fix. The "dev" variable is always NULL after
the while statement so we would be dereferencing a NULL pointer here.

Fixes: 819a3eba4233 ('[PATCH] applicom: fix error handling')
Signed-off-by: Dan Carpenter <***@oracle.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/char/applicom.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index 974321a2508d..14790304b84b 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -345,7 +345,6 @@ out:
free_irq(apbs[i].irq, &dummy);
iounmap(apbs[i].RamIO);
}
- pci_disable_device(dev);
return ret;
}

[Jiri Slaby]

=46rom: Bj=C3=B8rn Mork <***@mork.no>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit 8bc7a069402e1a443ded8088a8be0dc8aa1c2c9b upstream.

All the "non Gobi" Qualcomm based devices handled by this
driver share a common standard Sierra Wireless specific
layout. Adding code specifically for this layout allow
us to reduce the number of match entries per device from
three to one.

This change will result in a penalty wrt stable backports,
but simplifies new Sierra device addtitions in the long
term.

Signed-off-by: Bj=C3=B8rn Mork <***@mork.no>
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/serial/qcserial.c | 98 +++++++++++++++++++++++------------=
--------
1 file changed, 53 insertions(+), 45 deletions(-)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcseria=
l.c
index 217e29ccde52..91e7bb515398 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -26,10 +26,13 @@
enum qcserial_layouts {
QCSERIAL_G2K =3D 0, /* Gobi 2000 */
QCSERIAL_G1K =3D 1, /* Gobi 1000 */
+ QCSERIAL_SWI =3D 2, /* Sierra Wireless */
};
=20
#define DEVICE_G1K(v, p) \
USB_DEVICE(v, p), .driver_info =3D QCSERIAL_G1K
+#define DEVICE_SWI(v, p) \
+ USB_DEVICE(v, p), .driver_info =3D QCSERIAL_SWI
=20
static const struct usb_device_id id_table[] =3D {
/* Gobi 1000 devices */
@@ -132,46 +135,20 @@ static const struct usb_device_id id_table[] =3D =
{
{USB_DEVICE(0x12D1, 0x14F1)}, /* Sony Gobi 3000 Composite */
{USB_DEVICE(0x0AF0, 0x8120)}, /* Option GTM681W */
=20
- /* non Gobi Qualcomm serial devices */
- {USB_DEVICE_INTERFACE_NUMBER(0x0f3d, 0x68a2, 0)}, /* Sierra Wireless =
MC7700 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x0f3d, 0x68a2, 2)}, /* Sierra Wireless =
MC7700 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x0f3d, 0x68a2, 3)}, /* Sierra Wireless =
MC7700 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x114f, 0x68a2, 0)}, /* Sierra Wireless =
MC7750 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x114f, 0x68a2, 2)}, /* Sierra Wireless =
MC7750 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x114f, 0x68a2, 3)}, /* Sierra Wireless =
MC7750 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68a2, 0)}, /* Sierra Wireless =
MC7710 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68a2, 2)}, /* Sierra Wireless =
MC7710 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68a2, 3)}, /* Sierra Wireless =
MC7710 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68c0, 0)}, /* Sierra Wireless =
MC73xx Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68c0, 2)}, /* Sierra Wireless =
MC73xx NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x68c0, 3)}, /* Sierra Wireless =
MC73xx Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901c, 0)}, /* Sierra Wireless =
EM7700 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901c, 2)}, /* Sierra Wireless =
EM7700 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901c, 3)}, /* Sierra Wireless =
EM7700 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901f, 0)}, /* Sierra Wireless =
EM7355 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901f, 2)}, /* Sierra Wireless =
EM7355 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x901f, 3)}, /* Sierra Wireless =
EM7355 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9041, 0)}, /* Sierra Wireless =
MC7305/MC7355 Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9041, 2)}, /* Sierra Wireless =
MC7305/MC7355 NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9041, 3)}, /* Sierra Wireless =
MC7305/MC7355 Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9051, 0)}, /* Netgear AirCard =
340U Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9051, 2)}, /* Netgear AirCard =
340U NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x1199, 0x9051, 3)}, /* Netgear AirCard =
340U Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a2, 0)}, /* Dell Wireless 58=
06 Gobi(TM) 4G LTE Mobile Broadband Card Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a2, 2)}, /* Dell Wireless 58=
06 Gobi(TM) 4G LTE Mobile Broadband Card NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a2, 3)}, /* Dell Wireless 58=
06 Gobi(TM) 4G LTE Mobile Broadband Card Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a3, 0)}, /* Dell Wireless 55=
70 HSPA+ (42Mbps) Mobile Broadband Card Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a3, 2)}, /* Dell Wireless 55=
70 HSPA+ (42Mbps) Mobile Broadband Card NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a3, 3)}, /* Dell Wireless 55=
70 HSPA+ (42Mbps) Mobile Broadband Card Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a4, 0)}, /* Dell Wireless 55=
70e HSPA+ (42Mbps) Mobile Broadband Card Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a4, 2)}, /* Dell Wireless 55=
70e HSPA+ (42Mbps) Mobile Broadband Card NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a4, 3)}, /* Dell Wireless 55=
70e HSPA+ (42Mbps) Mobile Broadband Card Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a8, 0)}, /* Dell Wireless 58=
08 Gobi(TM) 4G LTE Mobile Broadband Card Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a8, 2)}, /* Dell Wireless 58=
08 Gobi(TM) 4G LTE Mobile Broadband Card NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a8, 3)}, /* Dell Wireless 58=
08 Gobi(TM) 4G LTE Mobile Broadband Card Modem */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a9, 0)}, /* Dell Wireless 58=
08e Gobi(TM) 4G LTE Mobile Broadband Card Device Management */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a9, 2)}, /* Dell Wireless 58=
08e Gobi(TM) 4G LTE Mobile Broadband Card NMEA */
- {USB_DEVICE_INTERFACE_NUMBER(0x413c, 0x81a9, 3)}, /* Dell Wireless 58=
08e Gobi(TM) 4G LTE Mobile Broadband Card Modem */
+ /* non-Gobi Sierra Wireless devices */
+ {DEVICE_SWI(0x0f3d, 0x68a2)}, /* Sierra Wireless MC7700 */
+ {DEVICE_SWI(0x114f, 0x68a2)}, /* Sierra Wireless MC7750 */
+ {DEVICE_SWI(0x1199, 0x68a2)}, /* Sierra Wireless MC7710 */
+ {DEVICE_SWI(0x1199, 0x68c0)}, /* Sierra Wireless MC73xx */
+ {DEVICE_SWI(0x1199, 0x901c)}, /* Sierra Wireless EM7700 */
+ {DEVICE_SWI(0x1199, 0x901f)}, /* Sierra Wireless EM7355 */
+ {DEVICE_SWI(0x1199, 0x9041)}, /* Sierra Wireless MC7305/MC7355 */
+ {DEVICE_SWI(0x1199, 0x9051)}, /* Netgear AirCard 340U */
+ {DEVICE_SWI(0x413c, 0x81a2)}, /* Dell Wireless 5806 Gobi(TM) 4G LTE M=
obile Broadband Card */
+ {DEVICE_SWI(0x413c, 0x81a3)}, /* Dell Wireless 5570 HSPA+ (42Mbps) Mo=
bile Broadband Card */
+ {DEVICE_SWI(0x413c, 0x81a4)}, /* Dell Wireless 5570e HSPA+ (42Mbps) M=
obile Broadband Card */
+ {DEVICE_SWI(0x413c, 0x81a8)}, /* Dell Wireless 5808 Gobi(TM) 4G LTE M=
obile Broadband Card */
+ {DEVICE_SWI(0x413c, 0x81a9)}, /* Dell Wireless 5808e Gobi(TM) 4G LTE =
Mobile Broadband Card */
=20
{ } /* Terminating entry */
};
@@ -220,11 +197,6 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
goto done;
}
=20
- if (nintf < 3 || nintf > 4) {
- dev_err(dev, "unknown number of interfaces: %d\n", nintf);
- goto done;
- }
-
/* default to enabling interface */
altsetting =3D 0;
=20
@@ -242,6 +214,12 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
* 2: AT-capable modem port
* 3: QMI/net
*/
+ if (nintf < 3 || nintf > 4) {
+ dev_err(dev, "unknown number of interfaces: %d\n", nintf);
+ altsetting =3D -1;
+ goto done;
+ }
+
if (ifnum =3D=3D 0) {
dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
altsetting =3D 1;
@@ -258,6 +236,12 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
* 2: AT-capable modem port
* 3: NMEA
*/
+ if (nintf < 3 || nintf > 4) {
+ dev_err(dev, "unknown number of interfaces: %d\n", nintf);
+ altsetting =3D -1;
+ goto done;
+ }
+
switch (ifnum) {
case 0:
/* Don't claim the QMI/net interface */
@@ -279,6 +263,30 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
break;
}
break;
+ case QCSERIAL_SWI:
+ /*
+ * Sierra Wireless layout:
+ * 0: DM/DIAG (use libqcdm from ModemManager for communication)
+ * 2: NMEA
+ * 3: AT-capable modem port
+ * 8: QMI/net
+ */
+ switch (ifnum) {
+ case 0:
+ dev_dbg(dev, "DM/DIAG interface found\n");
+ break;
+ case 2:
+ dev_dbg(dev, "NMEA GPS interface found\n");
+ break;
+ case 3:
+ dev_dbg(dev, "Modem port found\n");
+ break;
+ default:
+ /* don't claim any unsupported interface */
+ altsetting =3D -1;
+ break;
+ }
+ break;
default:
dev_err(dev, "unsupported device layout type: %lu\n",
id->driver_info);
--=20
2.0.0

[Jiri Slaby]

From: Krzysztof Kozlowski <***@samsung.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit dfee4111febf3d9ef3a640b2cd6205c75f4e7e3d upstream.

Fix NULL pointer exception when platform data is not supplied. The
driver dereferenced pdata pointer where it could be NULL.

Signed-off-by: Krzysztof Kozlowski <***@samsung.com>
Fixes: 810d601f07c
Signed-off-by: Chanwoo Choi <***@samsung.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/extcon/extcon-max8997.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 67d6738d85a0..09f4a9374cf5 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -712,7 +712,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
goto err_irq;
}

- if (pdata->muic_pdata) {
+ if (pdata && pdata->muic_pdata) {
struct max8997_muic_platform_data *muic_pdata
= pdata->muic_pdata;

[Jiri Slaby]

From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e3a767b60fd8a9f5e133f42f4970cff77ec43173 upstream.

We cannot drop last dquot reference from downconvert thread as that
creates the following deadlock:

NODE 1 NODE2
holds dentry lock for 'foo'
holds inode lock for GLOBAL_BITMAP_SYSTEM_INODE
dquot_initialize(bar)
ocfs2_dquot_acquire()
ocfs2_inode_lock(USER_QUOTA_SYSTEM_INODE)
...
downconvert thread (triggered from another
node or a different process from NODE2)
ocfs2_dentry_post_unlock()
...
iput(foo)
ocfs2_evict_inode(foo)
ocfs2_clear_inode(foo)
dquot_drop(inode)
...
ocfs2_dquot_release()
ocfs2_inode_lock(USER_QUOTA_SYSTEM_INODE)
- blocks
finds we need more space in
quota file
...
ocfs2_extend_no_holes()
ocfs2_inode_lock(GLOBAL_BITMAP_SYSTEM_INODE)
- deadlocks waiting for
downconvert thread

We solve the problem by postponing dropping of the last dquot reference to
a workqueue if it happens from the downconvert thread.

Signed-off-by: Jan Kara <***@suse.cz>
Reviewed-by: Mark Fasheh <***@suse.de>
Reviewed-by: Srinivas Eeda <***@oracle.com>
Cc: Joel Becker <***@evilplan.org>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/ocfs2/ocfs2.h | 5 +++++
fs/ocfs2/quota.h | 2 ++
fs/ocfs2/quota_global.c | 35 +++++++++++++++++++++++++++++++++++
fs/ocfs2/super.c | 8 ++++++++
4 files changed, 50 insertions(+)

diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 3a903470c794..1f023ae39379 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -30,6 +30,7 @@
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/list.h>
+#include <linux/llist.h>
#include <linux/rbtree.h>
#include <linux/workqueue.h>
#include <linux/kref.h>
@@ -418,6 +419,10 @@ struct ocfs2_super
struct ocfs2_dentry_lock *dentry_lock_list;
struct work_struct dentry_lock_work;

+ /* List of dquot structures to drop last reference to */
+ struct llist_head dquot_drop_list;
+ struct work_struct dquot_drop_work;
+
wait_queue_head_t osb_mount_event;

/* Truncate log info */
diff --git a/fs/ocfs2/quota.h b/fs/ocfs2/quota.h
index d5ab56cbe5c5..f266d67df3c6 100644
--- a/fs/ocfs2/quota.h
+++ b/fs/ocfs2/quota.h
@@ -28,6 +28,7 @@ struct ocfs2_dquot {
unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
s64 dq_origspace; /* Last globally synced space usage */
s64 dq_originodes; /* Last globally synced inode usage */
+ struct llist_node list; /* Member of list of dquots to drop */
};

/* Description of one chunk to recover in memory */
@@ -110,6 +111,7 @@ int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
int ocfs2_create_local_dquot(struct dquot *dquot);
int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
int ocfs2_local_write_dquot(struct dquot *dquot);
+void ocfs2_drop_dquot_refs(struct work_struct *work);

extern const struct dquot_operations ocfs2_quota_operations;
extern struct quota_format_type ocfs2_quota_format;
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index d7b5108789e2..b990a62cff50 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -10,6 +10,7 @@
#include <linux/jiffies.h>
#include <linux/writeback.h>
#include <linux/workqueue.h>
+#include <linux/llist.h>

#include <cluster/masklog.h>

@@ -679,6 +680,27 @@ static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
OCFS2_INODE_UPDATE_CREDITS;
}

+void ocfs2_drop_dquot_refs(struct work_struct *work)
+{
+ struct ocfs2_super *osb = container_of(work, struct ocfs2_super,
+ dquot_drop_work);
+ struct llist_node *list;
+ struct ocfs2_dquot *odquot, *next_odquot;
+
+ list = llist_del_all(&osb->dquot_drop_list);
+ llist_for_each_entry_safe(odquot, next_odquot, list, list) {
+ /* Drop the reference we acquired in ocfs2_dquot_release() */
+ dqput(&odquot->dq_dquot);
+ }
+}
+
+/*
+ * Called when the last reference to dquot is dropped. If we are called from
+ * downconvert thread, we cannot do all the handling here because grabbing
+ * quota lock could deadlock (the node holding the quota lock could need some
+ * other cluster lock to proceed but with blocked downconvert thread we cannot
+ * release any lock).
+ */
static int ocfs2_release_dquot(struct dquot *dquot)
{
handle_t *handle;
@@ -694,6 +716,19 @@ static int ocfs2_release_dquot(struct dquot *dquot)
/* Check whether we are not racing with some other dqget() */
if (atomic_read(&dquot->dq_count) > 1)
goto out;
+ /* Running from downconvert thread? Postpone quota processing to wq */
+ if (current == osb->dc_task) {
+ /*
+ * Grab our own reference to dquot and queue it for delayed
+ * dropping. Quota code rechecks after calling
+ * ->release_dquot() and won't free dquot structure.
+ */
+ dqgrab(dquot);
+ /* First entry on list -> queue work */
+ if (llist_add(&OCFS2_DQUOT(dquot)->list, &osb->dquot_drop_list))
+ queue_work(ocfs2_wq, &osb->dquot_drop_work);
+ goto out;
+ }
status = ocfs2_lock_global_qf(oinfo, 1);
if (status < 0)
goto out;
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index d4e81e4a9b04..d6adb5b2b3a5 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1945,6 +1945,11 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)

ocfs2_disable_quotas(osb);

+ /* All dquots should be freed by now */
+ WARN_ON(!llist_empty(&osb->dquot_drop_list));
+ /* Wait for worker to be done with the work structure in osb */
+ cancel_work_sync(&osb->dquot_drop_work);
+
ocfs2_shutdown_local_alloc(osb);

ocfs2_truncate_log_shutdown(osb);
@@ -2275,6 +2280,9 @@ static int ocfs2_initialize_super(struct super_block *sb,
INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
osb->dentry_lock_list = NULL;

+ INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
+ init_llist_head(&osb->dquot_drop_list);
+
/* get some pseudo constants for clustersize bits */
osb->s_clustersize_bits =
le32_to_cpu(di->id2.i_super.s_clustersize_bits);

[Jiri Slaby]

From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 84d86f83f9d0e8431a3c9eae4c47e9d7ff49a411 upstream.

If we are dropping last inode reference from downconvert thread, we will
end up calling ocfs2_mark_lockres_freeing() which can block if the lock
we are freeing is queued thus creating an A-A deadlock. Luckily, since
we are the downconvert thread, we can immediately dequeue the lock and
thus avoid waiting in this case.

Signed-off-by: Jan Kara <***@suse.cz>
Reviewed-by: Mark Fasheh <***@suse.de>
Reviewed-by: Srinivas Eeda <***@oracle.com>
Cc: Joel Becker <***@evilplan.org>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/ocfs2/dlmglue.c | 44 +++++++++++++++++++++++++++++++++++++++++---
fs/ocfs2/dlmglue.h | 3 ++-
fs/ocfs2/inode.c | 7 ++++---
3 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 3a44a648dae7..3988d0aeb72c 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3142,22 +3142,60 @@ out:
return 0;
}

+static void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
+ struct ocfs2_lock_res *lockres);
+
/* Mark the lockres as being dropped. It will no longer be
* queued if blocking, but we still may have to wait on it
* being dequeued from the downconvert thread before we can consider
* it safe to drop.
*
* You can *not* attempt to call cluster_lock on this lockres anymore. */
-void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres)
+void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
+ struct ocfs2_lock_res *lockres)
{
int status;
struct ocfs2_mask_waiter mw;
- unsigned long flags;
+ unsigned long flags, flags2;

ocfs2_init_mask_waiter(&mw);

spin_lock_irqsave(&lockres->l_lock, flags);
lockres->l_flags |= OCFS2_LOCK_FREEING;
+ if (lockres->l_flags & OCFS2_LOCK_QUEUED && current == osb->dc_task) {
+ /*
+ * We know the downconvert is queued but not in progress
+ * because we are the downconvert thread and processing
+ * different lock. So we can just remove the lock from the
+ * queue. This is not only an optimization but also a way
+ * to avoid the following deadlock:
+ * ocfs2_dentry_post_unlock()
+ * ocfs2_dentry_lock_put()
+ * ocfs2_drop_dentry_lock()
+ * iput()
+ * ocfs2_evict_inode()
+ * ocfs2_clear_inode()
+ * ocfs2_mark_lockres_freeing()
+ * ... blocks waiting for OCFS2_LOCK_QUEUED
+ * since we are the downconvert thread which
+ * should clear the flag.
+ */
+ spin_unlock_irqrestore(&lockres->l_lock, flags);
+ spin_lock_irqsave(&osb->dc_task_lock, flags2);
+ list_del_init(&lockres->l_blocked_list);
+ osb->blocked_lock_count--;
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags2);
+ /*
+ * Warn if we recurse into another post_unlock call. Strictly
+ * speaking it isn't a problem but we need to be careful if
+ * that happens (stack overflow, deadlocks, ...) so warn if
+ * ocfs2 grows a path for which this can happen.
+ */
+ WARN_ON_ONCE(lockres->l_ops->post_unlock);
+ /* Since the lock is freeing we don't do much in the fn below */
+ ocfs2_process_blocked_lock(osb, lockres);
+ return;
+ }
while (lockres->l_flags & OCFS2_LOCK_QUEUED) {
lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_QUEUED, 0);
spin_unlock_irqrestore(&lockres->l_lock, flags);
@@ -3178,7 +3216,7 @@ void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
{
int ret;

- ocfs2_mark_lockres_freeing(lockres);
+ ocfs2_mark_lockres_freeing(osb, lockres);
ret = ocfs2_drop_lock(osb, lockres);
if (ret)
mlog_errno(ret);
diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h
index 1d596d8c4a4a..d293a22c32c5 100644
--- a/fs/ocfs2/dlmglue.h
+++ b/fs/ocfs2/dlmglue.h
@@ -157,7 +157,8 @@ int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex);
void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex);


-void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
+void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb,
+ struct ocfs2_lock_res *lockres);
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres);

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 059fa362f4c0..e37a59a28644 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1069,6 +1069,7 @@ static void ocfs2_clear_inode(struct inode *inode)
{
int status;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

clear_inode(inode);
trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
@@ -1085,9 +1086,9 @@ static void ocfs2_clear_inode(struct inode *inode)

/* Do these before all the other work so that we don't bounce
* the downconvert thread while waiting to destroy the locks. */
- ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
- ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
- ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
+ ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
+ ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
+ ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);

ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
&oi->ip_la_data_resv);

[Jiri Slaby]

From: Zhichuang SUN <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fbc6c4a13bbfb420eedfdb26a0a859f9c07e8a7b upstream.

Function unifb_mmap calls functions which are defined in linux/mm.h
and asm/pgtable.h

The related error (for unicore32 with unicore32_defconfig):
CC drivers/video/fbdev/fb-puv3.o
drivers/video/fbdev/fb-puv3.c: In function 'unifb_mmap':
drivers/video/fbdev/fb-puv3.c:646: error: implicit declaration of
function 'vm_iomap_memory'
drivers/video/fbdev/fb-puv3.c:646: error: implicit declaration of
function 'pgprot_noncached'

Signed-off-by: Zhichuang Sun <***@gmail.com>
Cc: Jean-Christophe Plagniol-Villard <***@jcrosoft.com>
Cc: Tomi Valkeinen <***@ti.com>
Cc: Jingoo Han <***@samsung.com>
Cc: Daniel Vetter <***@ffwll.ch>
Cc: Joe Perches <***@perches.com>
Cc: Laurent Pinchart <***@ideasonboard.com>
Cc: linux-***@vger.kernel.org
Acked-by: Xuetao Guan <***@mprc.pku.edu.cn>
Signed-off-by: Tomi Valkeinen <***@ti.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/video/fb-puv3.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/video/fb-puv3.c b/drivers/video/fb-puv3.c
index 27fc956166fa..520112531eb0 100644
--- a/drivers/video/fb-puv3.c
+++ b/drivers/video/fb-puv3.c
@@ -18,8 +18,10 @@
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/console.h>
+#include <linux/mm.h>

#include <asm/sizes.h>
+#include <asm/pgtable.h>
#include <mach/hardware.h>

/* Platform_data reserved for unifb registers. */

[Jiri Slaby]

From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 9f985cb6c45bc3f8b7e161c9658d409d051d576f upstream.

Provide dqgrab() function to get quota structure reference when we are
sure it already has at least one active reference. Make use of this
function inside quota code.

Signed-off-by: Jan Kara <***@suse.cz>
Reviewed-by: Mark Fasheh <***@suse.de>
Reviewed-by: Srinivas Eeda <***@oracle.com>
Cc: Joel Becker <***@evilplan.org>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/quota/dquot.c | 4 ++--
include/linux/quotaops.h | 8 ++++++++
2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index cfc8dcc16043..9cd5f63715c0 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -528,7 +528,7 @@ restart:
if (atomic_read(&dquot->dq_count)) {
DEFINE_WAIT(wait);

- atomic_inc(&dquot->dq_count);
+ dqgrab(dquot);
prepare_to_wait(&dquot->dq_wait_unused, &wait,
TASK_UNINTERRUPTIBLE);
spin_unlock(&dq_list_lock);
@@ -632,7 +632,7 @@ int dquot_writeback_dquots(struct super_block *sb, int type)
/* Now we have active dquot from which someone is
* holding reference so we can safely just increase
* use count */
- atomic_inc(&dquot->dq_count);
+ dqgrab(dquot);
spin_unlock(&dq_list_lock);
dqstats_inc(DQST_LOOKUPS);
err = sb->dq_op->write_dquot(dquot);
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 6965fe394c3b..1d3eee594cd6 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -46,6 +46,14 @@ void inode_reclaim_rsv_space(struct inode *inode, qsize_t number);
void dquot_initialize(struct inode *inode);
void dquot_drop(struct inode *inode);
struct dquot *dqget(struct super_block *sb, struct kqid qid);
+static inline struct dquot *dqgrab(struct dquot *dquot)
+{
+ /* Make sure someone else has active reference to dquot */
+ WARN_ON_ONCE(!atomic_read(&dquot->dq_count));
+ WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags));
+ atomic_inc(&dquot->dq_count);
+ return dquot;
+}
void dqput(struct dquot *dquot);
int dquot_scan_active(struct super_block *sb,
int (*fn)(struct dquot *dquot, unsigned long priv),

[Jiri Slaby]

From: Ying Xue <***@windriver.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1621b94d2a655c8548ddbdfc8ccf907a5bbdc860 upstream.

Commit 1bb8dce57f4d15233688c68990852a10eb1cd79f ("tipc: fix memory
leak during module removal") introduced a memory leak issue: when
name table is stopped, it's forgotten that publication instances are
freed properly. Additionally the useless "continue" statement in
tipc_nametbl_stop() is removed as well.

Reported-by: Jason <***@gmail.com>
Signed-off-by: Ying Xue <***@windriver.com>
Acked-by: Erik Hugne <***@ericsson.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/tipc/name_table.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 299e45af7e4e..ec2ecbd515ae 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -962,6 +962,7 @@ static void tipc_purge_publications(struct name_seq *seq)
list_for_each_entry_safe(publ, safe, &info->zone_list, zone_list) {
tipc_nametbl_remove_publ(publ->type, publ->lower, publ->node,
publ->ref, publ->key);
+ kfree(publ);
}
}

@@ -986,7 +987,6 @@ void tipc_nametbl_stop(void)
hlist_for_each_entry_safe(seq, safe, seq_head, ns_list) {
tipc_purge_publications(seq);
}
- continue;
}
kfree(table.types);
table.types = NULL;

[Jiri Slaby]

From: Stephane Grosjean <***@peak-system.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 0b5a958cf4df3a5cd578b861471e62138f55c85e upstream.

As remarked by Christopher R. Baker in his post at

http://marc.info/?l=linux-can&m=139707295706465&w=2

there's a possibility for an use after free condition at device removal.

This simplified patch introduces an additional variable to prevent the issue.
Thanks for catching this.

Reported-by: Christopher R. Baker <***@rec.ri.cmu.edu>
Signed-off-by: Stephane Grosjean <***@peak-system.com>
Signed-off-by: Marc Kleine-Budde <***@pengutronix.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/can/sja1000/peak_pci.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/can/sja1000/peak_pci.c b/drivers/net/can/sja1000/peak_pci.c
index 6b6f0ad75090..7042f5faddd7 100644
--- a/drivers/net/can/sja1000/peak_pci.c
+++ b/drivers/net/can/sja1000/peak_pci.c
@@ -551,7 +551,7 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct sja1000_priv *priv;
struct peak_pci_chan *chan;
- struct net_device *dev;
+ struct net_device *dev, *prev_dev;
void __iomem *cfg_base, *reg_base;
u16 sub_sys_id, icr;
int i, err, channels;
@@ -687,11 +687,13 @@ failure_remove_channels:
writew(0x0, cfg_base + PITA_ICR + 2);

chan = NULL;
- for (dev = pci_get_drvdata(pdev); dev; dev = chan->prev_dev) {
- unregister_sja1000dev(dev);
- free_sja1000dev(dev);
+ for (dev = pci_get_drvdata(pdev); dev; dev = prev_dev) {
priv = netdev_priv(dev);
chan = priv->priv;
+ prev_dev = chan->prev_dev;
+
+ unregister_sja1000dev(dev);
+ free_sja1000dev(dev);
}

/* free any PCIeC resources too */
@@ -725,10 +727,12 @@ static void peak_pci_remove(struct pci_dev *pdev)

/* Loop over all registered devices */
while (1) {
+ struct net_device *prev_dev = chan->prev_dev;
+
dev_info(&pdev->dev, "removing device %s\n", dev->name);
unregister_sja1000dev(dev);
free_sja1000dev(dev);
- dev = chan->prev_dev;
+ dev = prev_dev;

if (!dev) {
/* do that only for first channel */

[Jiri Slaby]

From: Dan Carpenter <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4f3bcd878f1d3c730fe00f619b7260c6125d49eb upstream.

at91_adc_get_trigger_value_by_name() was returning -ENOMEM truncated to
a positive u8 and that doesn't work. I've changed it to int and
refactored it to preserve the error code.

Signed-off-by: Dan Carpenter <***@oracle.com>
Acked-by: Alexandre Belloni <***@free-electrons.com>
Tested-by: Alexandre Belloni <***@free-electrons.com>
Signed-off-by: Jonathan Cameron <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/iio/adc/at91_adc.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 0f16b553e063..b023cd3fe4f1 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -166,12 +166,11 @@ static int at91_adc_channel_init(struct iio_dev *idev)
return idev->num_channels;
}

-static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
+static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
struct at91_adc_trigger *triggers,
const char *trigger_name)
{
struct at91_adc_state *st = iio_priv(idev);
- u8 value = 0;
int i;

for (i = 0; i < st->trigger_number; i++) {
@@ -184,15 +183,16 @@ static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
return -ENOMEM;

if (strcmp(trigger_name, name) == 0) {
- value = triggers[i].value;
kfree(name);
- break;
+ if (triggers[i].value == 0)
+ return -EINVAL;
+ return triggers[i].value;
}

kfree(name);
}

- return value;
+ return -EINVAL;
}

static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
@@ -202,14 +202,14 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
struct iio_buffer *buffer = idev->buffer;
struct at91_adc_reg_desc *reg = st->registers;
u32 status = at91_adc_readl(st, reg->trigger_register);
- u8 value;
+ int value;
u8 bit;

value = at91_adc_get_trigger_value_by_name(idev,
st->trigger_list,
idev->trig->name);
- if (value == 0)
- return -EINVAL;
+ if (value < 0)
+ return value;

if (state) {
st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL);

[Jiri Slaby]

From: Peter Zijlstra <***@infradead.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cadefd3d6cc914d95163ba1eda766bfe7ce1e5b7 upstream.

Mike reported that, while unlikely, its entirely possible for
scale_rt_power() to see the time go backwards. This yields rather
'interesting' results.

So like all other sites that deal with clocks; make this one ignore
backward clock movement too.

Reported-by: Mike Galbraith <***@online.de>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Link: http://lkml.kernel.org/r/***@twins.programming.kicks-ass.net
Cc: Linus Torvalds <***@linux-foundation.org>
Cc: linux-***@vger.kernel.org
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/fair.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 25658d2c68d0..898622244bdf 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4404,6 +4404,7 @@ static unsigned long scale_rt_power(int cpu)
{
struct rq *rq = cpu_rq(cpu);
u64 total, available, age_stamp, avg;
+ s64 delta;

/*
* Since we're reading these variables without serialization make sure
@@ -4412,7 +4413,11 @@ static unsigned long scale_rt_power(int cpu)
age_stamp = ACCESS_ONCE(rq->age_stamp);
avg = ACCESS_ONCE(rq->rt_avg);

- total = sched_avg_period() + (rq_clock(rq) - age_stamp);
+ delta = rq_clock(rq) - age_stamp;
+ if (unlikely(delta < 0))
+ delta = 0;
+
+ total = sched_avg_period() + delta;

if (unlikely(total < avg)) {
/* Ensures that power won't end up being negative */

[Jiri Slaby]

From: Chen Gang <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1ff38c56cbd095c4c0dfa581a859ba3557830f78 upstream.

Need include "asm/pgtable.h" to include "asm-generic/pgtable-nopmd.h",
so can let 'pmd_t' defined. The related error with allmodconfig:

CC arch/unicore32/mm/alignment.o
In file included from arch/unicore32/mm/alignment.c:24:
arch/unicore32/include/asm/tlbflush.h:135: error: expected .). before .*. token
arch/unicore32/include/asm/tlbflush.h:154: error: expected .). before .*. token
In file included from arch/unicore32/mm/alignment.c:27:
arch/unicore32/mm/mm.h:15: error: expected .=., .,., .;., .sm. or ._attribute__. before .*. token
arch/unicore32/mm/mm.h:20: error: expected .=., .,., .;., .sm. or ._attribute__. before .*. token
arch/unicore32/mm/mm.h:25: error: expected .=., .,., .;., .sm. or ._attribute__. before .*. token
make[1]: *** [arch/unicore32/mm/alignment.o] Error 1
make: *** [arch/unicore32/mm] Error 2

Signed-off-by: Chen Gang <***@gmail.com>
Acked-by: Xuetao Guan <***@mprc.pku.edu.cn>
Signed-off-by: Xuetao Guan <***@mprc.pku.edu.cn>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/unicore32/mm/alignment.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/unicore32/mm/alignment.c b/arch/unicore32/mm/alignment.c
index de7dc5fdd58b..24e836023e6c 100644
--- a/arch/unicore32/mm/alignment.c
+++ b/arch/unicore32/mm/alignment.c
@@ -21,6 +21,7 @@
#include <linux/sched.h>
#include <linux/uaccess.h>

+#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/unaligned.h>

[Jiri Slaby]

=46rom: Bj=C3=B8rn Mork <***@mork.no>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit d712ca91db6d5463ca5a9b06eb6ba937c59a15fa upstream.

Preparing for more supported standard device layouts. Keeping
the matching macros unchanged to avoid breaking stable
backporting of new device additions.

Signed-off-by: Bj=C3=B8rn Mork <***@mork.no>
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/serial/qcserial.c | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcseria=
l.c
index e282155dd4a1..217e29ccde52 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -22,8 +22,14 @@
#define DRIVER_AUTHOR "Qualcomm Inc"
#define DRIVER_DESC "Qualcomm USB Serial driver"
=20
+/* standard device layouts supported by this driver */
+enum qcserial_layouts {
+ QCSERIAL_G2K =3D 0, /* Gobi 2000 */
+ QCSERIAL_G1K =3D 1, /* Gobi 1000 */
+};
+
#define DEVICE_G1K(v, p) \
- USB_DEVICE(v, p), .driver_info =3D 1
+ USB_DEVICE(v, p), .driver_info =3D QCSERIAL_G1K
=20
static const struct usb_device_id id_table[] =3D {
/* Gobi 1000 devices */
@@ -178,11 +184,8 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
int retval =3D -ENODEV;
__u8 nintf;
__u8 ifnum;
- bool is_gobi1k =3D id->driver_info ? true : false;
int altsetting =3D -1;
=20
- dev_dbg(dev, "Is Gobi 1000 =3D %d\n", is_gobi1k);
-
nintf =3D serial->dev->actconfig->desc.bNumInterfaces;
dev_dbg(dev, "Num Interfaces =3D %d\n", nintf);
ifnum =3D intf->desc.bInterfaceNumber;
@@ -230,7 +233,8 @@ static int qcprobe(struct usb_serial *serial, const=
struct usb_device_id *id)
* gets handled by other drivers.
*/
=20
- if (is_gobi1k) {
+ switch (id->driver_info) {
+ case QCSERIAL_G1K:
/*
* Gobi 1K USB layout:
* 0: DM/DIAG (use libqcdm from ModemManager for communication)
@@ -245,7 +249,8 @@ static int qcprobe(struct usb_serial *serial, const=
struct usb_device_id *id)
dev_dbg(dev, "Modem port found\n");
else
altsetting =3D -1;
- } else {
+ break;
+ case QCSERIAL_G2K:
/*
* Gobi 2K+ USB layout:
* 0: QMI/net
@@ -273,6 +278,11 @@ static int qcprobe(struct usb_serial *serial, cons=
t struct usb_device_id *id)
dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
break;
}
+ break;
+ default:
+ dev_err(dev, "unsupported device layout type: %lu\n",
+ id->driver_info);
+ break;
}
=20
done:
--=20
2.0.0

[Jiri Slaby]

=46rom: Bj=C3=B8rn Mork <***@mork.no>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit ce1b066136a30079c4e6e81e015ad9bc2180d46f upstream.

Use a consistent style for all multiline comments.

Signed-off-by: Bj=C3=B8rn Mork <***@mork.no>
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/serial/qcserial.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcseria=
l.c
index 6c0a542e8ec1..e282155dd4a1 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -225,12 +225,14 @@ static int qcprobe(struct usb_serial *serial, con=
st struct usb_device_id *id)
/* default to enabling interface */
altsetting =3D 0;
=20
- /* Composite mode; don't bind to the QMI/net interface as that
+ /*
+ * Composite mode; don't bind to the QMI/net interface as that
* gets handled by other drivers.
*/
=20
if (is_gobi1k) {
- /* Gobi 1K USB layout:
+ /*
+ * Gobi 1K USB layout:
* 0: DM/DIAG (use libqcdm from ModemManager for communication)
* 1: serial port (doesn't respond)
* 2: AT-capable modem port
@@ -244,7 +246,8 @@ static int qcprobe(struct usb_serial *serial, const=
struct usb_device_id *id)
else
altsetting =3D -1;
} else {
- /* Gobi 2K+ USB layout:
+ /*
+ * Gobi 2K+ USB layout:
* 0: QMI/net
* 1: DM/DIAG (use libqcdm from ModemManager for communication)
* 2: AT-capable modem port
--=20
2.0.0

[Jiri Slaby]

From: Krzysztof Kozlowski <***@samsung.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d5653f2b7304f05eeb45d84f123cf02f840b8537 upstream.

Fix NULL pointer exceptions when platform data is not supplied.

Trace of one exception:
Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = c0004000
[00000008] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.14.0-12045-gead5dd4687a6-dirty #1628
task: eea80000 ti: eea88000 task.ti: eea88000
PC is at max77693_muic_probe+0x27c/0x528
LR is at regmap_write+0x50/0x60
pc : [<c041d1c8>] lr : [<c02eba60>] psr: 20000113
sp : eea89e38 ip : 00000000 fp : c098a834
r10: ee1a5a10 r9 : 00000005 r8 : c098a83c
r7 : 0000000a r6 : c098a774 r5 : 00000005 r4 : eeb006d0
r3 : c0697bd8 r2 : 00000000 r1 : 00000001 r0 : 00000000
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c5387d Table: 4000404a DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xeea88240)
Stack: (0xeea89e38 to 0xeea8a000)
9e20: c08499fc eeb006d0
9e40: 00000000 00000000 c0915f98 00000001 00000000 ee1a5a10 c098a730 c09a88b8
9e60: 00000000 c098a730 c0915f98 00000000 00000000 c02d6aa0 c02d6a88 ee1a5a10
9e80: c0a712c8 c02d54e4 00001204 c0628b00 ee1a5a10 c098a730 ee1a5a44 00000000
9ea0: eea88000 c02d57b4 00000000 c098a730 c02d5728 c02d3a24 ee813e5c eeb9d534
9ec0: c098a730 ee22f700 c097c720 c02d4b14 c08174ec c098a730 00000006 c098a730
9ee0: 00000006 c092fd30 c09b8500 c02d5df8 00000000 c093cbb8 00000006 c0008928
9f00: 000000c3 ef7fc785 00000000 ef7fc794 00000000 c08af968 00000072 eea89f30
9f20: ef7fc85e c065f198 000000c3 c003e87c 00000003 00000000 c092fd3c 00000000
9f40: c08af618 c0826d58 00000006 00000006 c0956f58 c093cbb8 00000006 c092fd30
9f60: c09b8500 000000c3 c092fd3c c08e8510 00000000 c08e8bb0 00000006 00000006
9f80: c08e8510 c0c0c0c0 00000000 c0628fac 00000000 00000000 00000000 00000000
9fa0: 00000000 c0628fb4 00000000 c000f038 00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 c0c0c0c0 c0c0c0c0
[<c041d1c8>] (max77693_muic_probe) from [<c02d6aa0>] (platform_drv_probe+0x18/0x48)
[<c02d6aa0>] (platform_drv_probe) from [<c02d54e4>] (driver_probe_device+0x140/0x384)
[<c02d54e4>] (driver_probe_device) from [<c02d57b4>] (__driver_attach+0x8c/0x90)
[<c02d57b4>] (__driver_attach) from [<c02d3a24>] (bus_for_each_dev+0x54/0x88)
[<c02d3a24>] (bus_for_each_dev) from [<c02d4b14>] (bus_add_driver+0xe8/0x204)
[<c02d4b14>] (bus_add_driver) from [<c02d5df8>] (driver_register+0x78/0xf4)
[<c02d5df8>] (driver_register) from [<c0008928>] (do_one_initcall+0xc4/0x174)
[<c0008928>] (do_one_initcall) from [<c08e8bb0>] (kernel_init_freeable+0xfc/0x1c8)
[<c08e8bb0>] (kernel_init_freeable) from [<c0628fb4>] (kernel_init+0x8/0xec)
[<c0628fb4>] (kernel_init) from [<c000f038>] (ret_from_fork+0x14/0x3c)
Code: caffffe7 e59d200c e3550001 b3a05001 (e5923008)
---[ end trace 85db969ce011bde7 ]---

Signed-off-by: Krzysztof Kozlowski <***@samsung.com>
Fixes: 190d7cfc8632
Signed-off-by: Chanwoo Choi <***@samsung.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/extcon/extcon-max77693.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index b56bdaa27d4b..9966fc0a527f 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -1180,7 +1180,7 @@ static int max77693_muic_probe(struct platform_device *pdev)


/* Initialize MUIC register by using platform data or default data */
- if (pdata->muic_data) {
+ if (pdata && pdata->muic_data) {
init_data = pdata->muic_data->init_data;
num_init_data = pdata->muic_data->num_init_data;
} else {
@@ -1213,7 +1213,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
= init_data[i].data;
}

- if (pdata->muic_data) {
+ if (pdata && pdata->muic_data) {
struct max77693_muic_platform_data *muic_pdata = pdata->muic_data;

/*

[Jiri Slaby]

From: Tom Gundersen <***@jklm.no>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 21bdd17b21b45ea48e06e23918d681afbe0622e9 upstream.

Commit 78551277e4df5: "Input: i8042 - add PNP modaliases" had a bug, where the
second call to MODULE_DEVICE_TABLE() overrode the first resulting in not all
the modaliases being exposed.

This fixes the problem by including the name of the device_id table in the
__mod_*_device_table alias, allowing us to export several device_id tables
per module.

Suggested-by: Kay Sievers <***@vrfy.org>
Acked-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Cc: Dmitry Torokhov <***@gmail.com>
Signed-off-by: Tom Gundersen <***@jklm.no>
Signed-off-by: Rusty Russell <***@rustcorp.com.au>
Signed-off-by: Jiri Slaby <***@suse.cz>

Conflicts:
include/linux/module.h
---
include/linux/module.h | 2 +-
scripts/mod/file2alias.c | 14 +++++++++-----
2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/include/linux/module.h b/include/linux/module.h
index 05f2447f8c15..54aef1b38463 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -143,7 +143,7 @@ extern const struct gtype##_id __mod_##gtype##_table \
#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)

#define MODULE_DEVICE_TABLE(type,name) \
- MODULE_GENERIC_TABLE(type##_device,name)
+ MODULE_GENERIC_TABLE(type##__##name##_device, name)

/* Version of form [<epoch>:]<version>[-<extra-version>].
Or for CVS/RCS ID version, everything but the number is stripped.
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 25e5cb0aaef6..ce164044f0cc 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -42,7 +42,7 @@ typedef unsigned char __u8;

/* This array collects all instances that use the generic do_table */
struct devtable {
- const char *device_id; /* name of table, __mod_<name>_device_table. */
+ const char *device_id; /* name of table, __mod_<name>__*_device_table. */
unsigned long id_size;
void *function;
};
@@ -146,7 +146,8 @@ static void device_id_check(const char *modname, const char *device_id,

if (size % id_size || size < id_size) {
fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
- "of the size of section __mod_%s_device_table=%lu.\n"
+ "of the size of "
+ "section __mod_%s__<identifier>_device_table=%lu.\n"
"Fix definition of struct %s_device_id "
"in mod_devicetable.h\n",
modname, device_id, id_size, device_id, size, device_id);
@@ -1206,7 +1207,7 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
{
void *symval;
char *zeros = NULL;
- const char *name;
+ const char *name, *identifier;
unsigned int namelen;

/* We're looking for a section relative symbol */
@@ -1217,7 +1218,7 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
return;

- /* All our symbols are of form <prefix>__mod_XXX_device_table. */
+ /* All our symbols are of form <prefix>__mod_<name>__<identifier>_device_table. */
name = strstr(symname, "__mod_");
if (!name)
return;
@@ -1227,7 +1228,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
return;
if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
return;
- namelen -= strlen("_device_table");
+ identifier = strstr(name, "__");
+ if (!identifier)
+ return;
+ namelen = identifier - name;

/* Handle all-NULL symbols allocated into .bss */
if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {

[Jiri Slaby]

From: Mario Schuknecht <***@dresearch-fe.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c404618cd06dad771495fe1cf9d5a63b5664f65f upstream.

Consider high byte of proximity min and max treshold in function
'tsl2x7x_chip_on'. So far, the high byte was not set.

Signed-off-by: Mario Schuknecht <***@dresearch-fe.de>
Signed-off-by: Jonathan Cameron <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/staging/iio/light/tsl2x7x_core.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c
index c99f890cc6c6..64c73adfa3b0 100644
--- a/drivers/staging/iio/light/tsl2x7x_core.c
+++ b/drivers/staging/iio/light/tsl2x7x_core.c
@@ -672,9 +672,13 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
chip->tsl2x7x_settings.prox_pulse_count;
chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
- chip->tsl2x7x_settings.prox_thres_low;
+ (chip->tsl2x7x_settings.prox_thres_low) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHHI] =
+ (chip->tsl2x7x_settings.prox_thres_low >> 8) & 0xFF;
chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
- chip->tsl2x7x_settings.prox_thres_high;
+ (chip->tsl2x7x_settings.prox_thres_high) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHHI] =
+ (chip->tsl2x7x_settings.prox_thres_high >> 8) & 0xFF;

/* and make sure we're not already on */
if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {

[Jiri Slaby]

From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bd62ad7aebd8e8895bb7649ace948040332f27d3 upstream.

Move dquot_initalize() call in ocfs2_delete_inode() after the moment we
verify inode is actually a sane one to delete. We certainly don't want
to initialize quota for system inodes etc. This also avoids calling
into quota code from downconvert thread.

Add more details into the comment why bailing out from
ocfs2_delete_inode() when we are in downconvert thread is OK.

Signed-off-by: Jan Kara <***@suse.cz>
Reviewed-by: Mark Fasheh <***@suse.de>
Reviewed-by: Srinivas Eeda <***@oracle.com>
Cc: Joel Becker <***@evilplan.org>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/ocfs2/inode.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index f87f9bd1edff..059fa362f4c0 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -814,11 +814,13 @@ static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
goto bail;
}

- /* If we're coming from downconvert_thread we can't go into our own
- * voting [hello, deadlock city!], so unforuntately we just
- * have to skip deleting this guy. That's OK though because
- * the node who's doing the actual deleting should handle it
- * anyway. */
+ /*
+ * If we're coming from downconvert_thread we can't go into our own
+ * voting [hello, deadlock city!] so we cannot delete the inode. But
+ * since we dropped last inode ref when downconverting dentry lock,
+ * we cannot have the file open and thus the node doing unlink will
+ * take care of deleting the inode.
+ */
if (current == osb->dc_task)
goto bail;

@@ -970,8 +972,6 @@ static void ocfs2_delete_inode(struct inode *inode)
if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
goto bail;

- dquot_initialize(inode);
-
if (!ocfs2_inode_is_valid_to_delete(inode)) {
/* It's probably not necessary to truncate_inode_pages
* here but we do it for safety anyway (it will most
@@ -980,6 +980,8 @@ static void ocfs2_delete_inode(struct inode *inode)
goto bail;
}

+ dquot_initialize(inode);
+
/* We want to block signals in delete_inode as the lock and
* messaging paths may return us -ERESTARTSYS. Which would
* cause us to exit early, resulting in inodes being orphaned

[Jiri Slaby]

From: Miao Xie <***@cn.fujitsu.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 20dd2cbf01888a91fdd921403040a710b275a1ff upstream.

When we did space balance and snapshot creation at the same time, we might
meet the following oops:
kernel BUG at fs/btrfs/inode.c:3038!
[SNIP]
Call Trace:
[<ffffffffa0411ec7>] btrfs_orphan_cleanup+0x293/0x407 [btrfs]
[<ffffffffa042dc45>] btrfs_mksubvol.isra.28+0x259/0x373 [btrfs]
[<ffffffffa042de85>] btrfs_ioctl_snap_create_transid+0x126/0x156 [btrfs]
[<ffffffffa042dff1>] btrfs_ioctl_snap_create_v2+0xd0/0x121 [btrfs]
[<ffffffffa0430b2c>] btrfs_ioctl+0x414/0x1854 [btrfs]
[<ffffffff813b60b7>] ? __do_page_fault+0x305/0x379
[<ffffffff811215a9>] vfs_ioctl+0x1d/0x39
[<ffffffff81121d7c>] do_vfs_ioctl+0x32d/0x3e2
[<ffffffff81057fe7>] ? finish_task_switch+0x80/0xb8
[<ffffffff81121e88>] SyS_ioctl+0x57/0x83
[<ffffffff813b39ff>] ? do_device_not_available+0x12/0x14
[<ffffffff813b99c2>] system_call_fastpath+0x16/0x1b
[SNIP]
RIP [<ffffffffa040da40>] btrfs_orphan_add+0xc3/0x126 [btrfs]

The reason of the problem is that the relocation root creation stole
the reserved space, which was reserved for orphan item deletion.

There are several ways to fix this problem, one is to increasing
the reserved space size of the space balace, and then we can use
that space to create the relocation tree for each fs/file trees.
But it is hard to calculate the suitable size because we doesn't
know how many fs/file trees we need relocate.

We fixed this problem by reserving the space for relocation root creation
actively since the space it need is very small (one tree block, used for
root node copy), then we use that reserved space to create the
relocation tree. If we don't reserve space for relocation tree creation,
we will use the reserved space of the balance.

Signed-off-by: Miao Xie <***@cn.fujitsu.com>
Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/relocation.c | 6 ++++--
fs/btrfs/transaction.c | 24 +++++++++++++++++++++++-
fs/btrfs/transaction.h | 1 +
3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 26450d850f14..225c5b2e748f 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1383,6 +1383,7 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
{
struct btrfs_root *reloc_root;
struct reloc_control *rc = root->fs_info->reloc_ctl;
+ struct btrfs_block_rsv *rsv;
int clear_rsv = 0;
int ret;

@@ -1396,13 +1397,14 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
return 0;

- if (!trans->block_rsv) {
+ if (!trans->reloc_reserved) {
+ rsv = trans->block_rsv;
trans->block_rsv = rc->block_rsv;
clear_rsv = 1;
}
reloc_root = create_reloc_root(trans, root, root->root_key.objectid);
if (clear_rsv)
- trans->block_rsv = NULL;
+ trans->block_rsv = rsv;

ret = __add_reloc_root(reloc_root);
BUG_ON(ret < 0);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 3b2acdeb659c..977314e2d078 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -353,6 +353,17 @@ static int may_wait_transaction(struct btrfs_root *root, int type)
return 0;
}

+static inline bool need_reserve_reloc_root(struct btrfs_root *root)
+{
+ if (!root->fs_info->reloc_ctl ||
+ !root->ref_cows ||
+ root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||
+ root->reloc_root)
+ return false;
+
+ return true;
+}
+
static struct btrfs_trans_handle *
start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
enum btrfs_reserve_flush_enum flush)
@@ -360,8 +371,9 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
struct btrfs_trans_handle *h;
struct btrfs_transaction *cur_trans;
u64 num_bytes = 0;
- int ret;
u64 qgroup_reserved = 0;
+ bool reloc_reserved = false;
+ int ret;

if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))
return ERR_PTR(-EROFS);
@@ -390,6 +402,14 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
}

num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
+ /*
+ * Do the reservation for the relocation root creation
+ */
+ if (unlikely(need_reserve_reloc_root(root))) {
+ num_bytes += root->nodesize;
+ reloc_reserved = true;
+ }
+
ret = btrfs_block_rsv_add(root,
&root->fs_info->trans_block_rsv,
num_bytes, flush);
@@ -451,6 +471,7 @@ again:
h->delayed_ref_elem.seq = 0;
h->type = type;
h->allocating_chunk = false;
+ h->reloc_reserved = false;
INIT_LIST_HEAD(&h->qgroup_ref_list);
INIT_LIST_HEAD(&h->new_bgs);

@@ -466,6 +487,7 @@ again:
h->transid, num_bytes, 1);
h->block_rsv = &root->fs_info->trans_block_rsv;
h->bytes_reserved = num_bytes;
+ h->reloc_reserved = reloc_reserved;
}
h->qgroup_reserved = qgroup_reserved;

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 306f88ae1de3..7657d115067d 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -92,6 +92,7 @@ struct btrfs_trans_handle {
short aborted;
short adding_csums;
bool allocating_chunk;
+ bool reloc_reserved;
unsigned int type;
/*
* this root is only needed to validate that the root passed to

[Jiri Slaby]

From: Roger Quadros <***@ti.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e5e4746510d140261918aecce2e5e3aa4456f7e9 upstream.

Without a timetout some tests e.g. test_halt() can remain stuck forever.

Signed-off-by: Roger Quadros <***@ti.com>
Reviewed-by: Felipe Balbi <***@ti.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/misc/usbtest.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index aa28ac8c7607..afe616b55f01 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -10,6 +10,7 @@

#include <linux/usb.h>

+#define SIMPLE_IO_TIMEOUT 10000 /* in milliseconds */

/*-------------------------------------------------------------------------*/

@@ -366,6 +367,7 @@ static int simple_io(
int max = urb->transfer_buffer_length;
struct completion completion;
int retval = 0;
+ unsigned long expire;

urb->context = &completion;
while (retval == 0 && iterations-- > 0) {
@@ -378,9 +380,15 @@ static int simple_io(
if (retval != 0)
break;

- /* NOTE: no timeouts; can't be broken out of by interrupt */
- wait_for_completion(&completion);
- retval = urb->status;
+ expire = msecs_to_jiffies(SIMPLE_IO_TIMEOUT);
+ if (!wait_for_completion_timeout(&completion, expire)) {
+ usb_kill_urb(urb);
+ retval = (urb->status == -ENOENT ?
+ -ETIMEDOUT : urb->status);
+ } else {
+ retval = urb->status;
+ }
+
urb->dev = udev;
if (retval == 0 && usb_pipein(urb->pipe))
retval = simple_check_buf(tdev, urb);

[Jiri Slaby]

=46rom: Quentin Casasnovas <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit 74073c9dd29905645feb6dee03c144657a9844cd upstream.

On bo reservation failure, we end up leaking fpriv.

v2 (chk): rebased and added missing free on vm failure as well

=46ixes: 5e386b574cf7e1 ("drm/radeon: fix missing bo reservation")
Cc: ***@vger.kernel.org
Cc: Christian K=C3=B6nig <***@amd.com>
Cc: Alex Deucher <***@amd.com>
Signed-off-by: Quentin Casasnovas <***@oracle.com>
Signed-off-by: Christian K=C3=B6nig <***@amd.com>
Signed-off-by: Jiri Slaby <***@suse.cz>

Conflicts:
drivers/gpu/drm/radeon/radeon_kms.c
---
drivers/gpu/drm/radeon/radeon_kms.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/rade=
on/radeon_kms.c
index 7456ce186f29..a134e8bf53f5 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -501,8 +501,11 @@ int radeon_driver_open_kms(struct drm_device *dev,=
struct drm_file *file_priv)
radeon_vm_init(rdev, &fpriv->vm);
=20
r =3D radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
- if (r)
+ if (r) {
+ radeon_vm_fini(rdev, &fpriv->vm);
+ kfree(fpriv);
return r;
+ }
=20
/* map the ib pool buffer read only into
* virtual address space */
--=20
2.0.0

[Jiri Slaby]

From: Aleksander Morgado <***@aleksander.es>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ff1fcd50bc2459744e6f948310bc18eb7d6e8c72 upstream.

Signed-off-by: Aleksander Morgado <***@aleksander.es>
Cc: stable <***@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/serial/qcserial.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index 91e7bb515398..2029f8f7f53f 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -144,6 +144,7 @@ static const struct usb_device_id id_table[] = {
{DEVICE_SWI(0x1199, 0x901f)}, /* Sierra Wireless EM7355 */
{DEVICE_SWI(0x1199, 0x9041)}, /* Sierra Wireless MC7305/MC7355 */
{DEVICE_SWI(0x1199, 0x9051)}, /* Netgear AirCard 340U */
+ {DEVICE_SWI(0x1199, 0x9055)}, /* Netgear AirCard 341U */
{DEVICE_SWI(0x413c, 0x81a2)}, /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
{DEVICE_SWI(0x413c, 0x81a3)}, /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
{DEVICE_SWI(0x413c, 0x81a4)}, /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */

[Jiri Slaby]

From: Petr Mladek <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 964f7b6b785651a75ef1cbad43a393ca52d4b4f7 upstream.

I just went over this when looking at some Xen-related ftrace initialization
problems. They were related to Xen code that is not upstream but this clean up
would make sense here.

I think that this was already the intention when text_ip_addr() was introduced
in the commit 87fbb2ac6073a703930 (ftrace/x86: Use breakpoints for converting
function graph caller). Anyway, better do it now before it shots people into
their leg ;-)

Link: http://lkml.kernel.org/p/1401812601-2359-1-git-send-email-***@suse.cz

Signed-off-by: Petr Mladek <***@suse.cz>
Signed-off-by: Steven Rostedt <***@goodmis.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/x86/kernel/ftrace.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 1ffc32dbe450..f8ab203fb676 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -297,16 +297,7 @@ int ftrace_int3_handler(struct pt_regs *regs)

static int ftrace_write(unsigned long ip, const char *val, int size)
{
- /*
- * On x86_64, kernel text mappings are mapped read-only with
- * CONFIG_DEBUG_RODATA. So we use the kernel identity mapping instead
- * of the kernel text mapping to modify the kernel text.
- *
- * For 32bit kernels, these mappings are same and we can use
- * kernel identity mapping to modify code.
- */
- if (within(ip, (unsigned long)_text, (unsigned long)_etext))
- ip = (unsigned long)__va(__pa_symbol(ip));
+ ip = text_ip_addr(ip);

return probe_kernel_write((void *)ip, val, size);
}

[Jiri Slaby]

From: Dave Chinner <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 273203699f82667296e1f14344c5a5a6c4600470 upstream.

Removing an inode from the namespace involves removing the directory
entry and dropping the link count on the inode. Removing the
directory entry can result in locking an AGF (directory blocks were
freed) and removing a link count can result in placing the inode on
an unlinked list which results in locking an AGI.

The big problem here is that we have an ordering constraint on AGF
and AGI locking - inode allocation locks the AGI, then can allocate
a new extent for new inodes, locking the AGF after the AGI.
Similarly, freeing the inode removes the inode from the unlinked
list, requiring that we lock the AGI first, and then freeing the
inode can result in an inode chunk being freed and hence freeing
disk space requiring that we lock an AGF.

Hence the ordering that is imposed by other parts of the code is AGI
before AGF. This means we cannot remove the directory entry before
we drop the inode reference count and put it on the unlinked list as
this results in a lock order of AGF then AGI, and this can deadlock
against inode allocation and freeing. Therefore we must drop the
link counts before we remove the directory entry.

This is still safe from a transactional point of view - it is not
until we get to xfs_bmap_finish() that we have the possibility of
multiple transactions in this operation. Hence as long as we remove
the directory entry and drop the link count in the first transaction
of the remove operation, there are no transactional constraints on
the ordering here.

Change the ordering of the operations in the xfs_remove() function
to align the ordering of AGI and AGF locking to match that of the
rest of the code.

Signed-off-by: Dave Chinner <***@redhat.com>
Reviewed-by: Ben Myers <***@sgi.com>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_inode.c | 72 +++++++++++++++++++++++++++++++++---------------------
1 file changed, 44 insertions(+), 28 deletions(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index e3d75385aa76..7a460d8ad06e 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2370,6 +2370,33 @@ xfs_iunpin_wait(
__xfs_iunpin_wait(ip);
}

+/*
+ * Removing an inode from the namespace involves removing the directory entry
+ * and dropping the link count on the inode. Removing the directory entry can
+ * result in locking an AGF (directory blocks were freed) and removing a link
+ * count can result in placing the inode on an unlinked list which results in
+ * locking an AGI.
+ *
+ * The big problem here is that we have an ordering constraint on AGF and AGI
+ * locking - inode allocation locks the AGI, then can allocate a new extent for
+ * new inodes, locking the AGF after the AGI. Similarly, freeing the inode
+ * removes the inode from the unlinked list, requiring that we lock the AGI
+ * first, and then freeing the inode can result in an inode chunk being freed
+ * and hence freeing disk space requiring that we lock an AGF.
+ *
+ * Hence the ordering that is imposed by other parts of the code is AGI before
+ * AGF. This means we cannot remove the directory entry before we drop the inode
+ * reference count and put it on the unlinked list as this results in a lock
+ * order of AGF then AGI, and this can deadlock against inode allocation and
+ * freeing. Therefore we must drop the link counts before we remove the
+ * directory entry.
+ *
+ * This is still safe from a transactional point of view - it is not until we
+ * get to xfs_bmap_finish() that we have the possibility of multiple
+ * transactions in this operation. Hence as long as we remove the directory
+ * entry and drop the link count in the first transaction of the remove
+ * operation, there are no transactional constraints on the ordering here.
+ */
int
xfs_remove(
xfs_inode_t *dp,
@@ -2439,6 +2466,7 @@ xfs_remove(
/*
* If we're removing a directory perform some additional validation.
*/
+ cancel_flags |= XFS_TRANS_ABORT;
if (is_dir) {
ASSERT(ip->i_d.di_nlink >= 2);
if (ip->i_d.di_nlink != 2) {
@@ -2449,31 +2477,16 @@ xfs_remove(
error = XFS_ERROR(ENOTEMPTY);
goto out_trans_cancel;
}
- }

- xfs_bmap_init(&free_list, &first_block);
- error = xfs_dir_removename(tp, dp, name, ip->i_ino,
- &first_block, &free_list, resblks);
- if (error) {
- ASSERT(error != ENOENT);
- goto out_bmap_cancel;
- }
- xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
-
- if (is_dir) {
- /*
- * Drop the link from ip's "..".
- */
+ /* Drop the link from ip's "..". */
error = xfs_droplink(tp, dp);
if (error)
- goto out_bmap_cancel;
+ goto out_trans_cancel;

- /*
- * Drop the "." link from ip to self.
- */
+ /* Drop the "." link from ip to self. */
error = xfs_droplink(tp, ip);
if (error)
- goto out_bmap_cancel;
+ goto out_trans_cancel;
} else {
/*
* When removing a non-directory we need to log the parent
@@ -2482,20 +2495,24 @@ xfs_remove(
*/
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
}
+ xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);

- /*
- * Drop the link from dp to ip.
- */
+ /* Drop the link from dp to ip. */
error = xfs_droplink(tp, ip);
if (error)
- goto out_bmap_cancel;
+ goto out_trans_cancel;

- /*
- * Determine if this is the last link while
- * we are in the transaction.
- */
+ /* Determine if this is the last link while the inode is locked */
link_zero = (ip->i_d.di_nlink == 0);

+ xfs_bmap_init(&free_list, &first_block);
+ error = xfs_dir_removename(tp, dp, name, ip->i_ino,
+ &first_block, &free_list, resblks);
+ if (error) {
+ ASSERT(error != ENOENT);
+ goto out_bmap_cancel;
+ }
+
/*
* If this is a synchronous mount, make sure that the
* remove transaction goes to disk before returning to
@@ -2525,7 +2542,6 @@ xfs_remove(

out_bmap_cancel:
xfs_bmap_cancel(&free_list);
- cancel_flags |= XFS_TRANS_ABORT;
out_trans_cancel:
xfs_trans_cancel(tp, cancel_flags);
std_return:

[Jiri Slaby]

From: Dave Chinner <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 2c6e24ce1aa6b3b147c75d488c2797ee258eb22b upstream.

Recent analysis of a deadlocked XFS filesystem from a kernel
crash dump indicated that the filesystem was stuck waiting for log
space. The short story of the hang on the RHEL6 kernel is this:

- the tail of the log is pinned by an inode
- the inode has been pushed by the xfsaild
- the inode has been flushed to it's backing buffer and is
currently flush locked and hence waiting for backing
buffer IO to complete and remove it from the AIL
- the backing buffer is marked for write - it is on the
delayed write queue
- the inode buffer has been modified directly and logged
recently due to unlinked inode list modification
- the backing buffer is pinned in memory as it is in the
active CIL context.
- the xfsbufd won't start buffer writeback because it is
pinned
- xfssyncd won't force the log because it sees the log as
needing to be covered and hence wants to issue a dummy
transaction to move the log covering state machine along.

Hence there is no trigger to force the CIL to the log and hence
unpin the inode buffer and therefore complete the inode IO, remove
it from the AIL and hence move the tail of the log along, allowing
transactions to start again.

Mainline kernels also have the same deadlock, though the signature
is slightly different - the inode buffer never reaches the delayed
write lists because xfs_buf_item_push() sees that it is pinned and
hence never adds it to the delayed write list that the xfsaild
flushes.

There are two possible solutions here. The first is to simply force
the log before trying to cover the log and so ensure that the CIL is
emptied before we try to reserve space for the dummy transaction in
the xfs_log_worker(). While this might work most of the time, it is
still racy and is no guarantee that we don't get stuck in
xfs_trans_reserve waiting for log space to come free. Hence it's not
the best way to solve the problem.

The second solution is to modify xfs_log_need_covered() to be aware
of the CIL. We only should be attempting to cover the log if there
is no current activity in the log - covering the log is the process
of ensuring that the head and tail in the log on disk are identical
(i.e. the log is clean and at idle). Hence, by definition, if there
are items in the CIL then the log is not at idle and so we don't
need to attempt to cover it.

When we don't need to cover the log because it is active or idle, we
issue a log force from xfs_log_worker() - if the log is idle, then
this does nothing. However, if the log is active due to there being
items in the CIL, it will force the items in the CIL to the log and
unpin them.

In the case of the above deadlock scenario, instead of
xfs_log_worker() getting stuck in xfs_trans_reserve() attempting to
cover the log, it will instead force the log, thereby unpinning the
inode buffer, allowing IO to be issued and complete and hence
removing the inode that was pinning the tail of the log from the
AIL. At that point, everything will start moving along again. i.e.
the xfs_log_worker turns back into a watchdog that can alleviate
deadlocks based around pinned items that prevent the tail of the log
from being moved...

Signed-off-by: Dave Chinner <***@redhat.com>
Reviewed-by: Eric Sandeen <***@redhat.com>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_log.c | 48 +++++++++++++++++++++++++++++-------------------
fs/xfs/xfs_log_cil.c | 14 ++++++++++++++
fs/xfs/xfs_log_priv.h | 10 ++++------
3 files changed, 47 insertions(+), 25 deletions(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a2dea108071a..613ed9414e70 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1000,27 +1000,34 @@ xfs_log_space_wake(
}

/*
- * Determine if we have a transaction that has gone to disk
- * that needs to be covered. To begin the transition to the idle state
- * firstly the log needs to be idle (no AIL and nothing in the iclogs).
- * If we are then in a state where covering is needed, the caller is informed
- * that dummy transactions are required to move the log into the idle state.
+ * Determine if we have a transaction that has gone to disk that needs to be
+ * covered. To begin the transition to the idle state firstly the log needs to
+ * be idle. That means the CIL, the AIL and the iclogs needs to be empty before
+ * we start attempting to cover the log.
*
- * Because this is called as part of the sync process, we should also indicate
- * that dummy transactions should be issued in anything but the covered or
- * idle states. This ensures that the log tail is accurately reflected in
- * the log at the end of the sync, hence if a crash occurrs avoids replay
- * of transactions where the metadata is already on disk.
+ * Only if we are then in a state where covering is needed, the caller is
+ * informed that dummy transactions are required to move the log into the idle
+ * state.
+ *
+ * If there are any items in the AIl or CIL, then we do not want to attempt to
+ * cover the log as we may be in a situation where there isn't log space
+ * available to run a dummy transaction and this can lead to deadlocks when the
+ * tail of the log is pinned by an item that is modified in the CIL. Hence
+ * there's no point in running a dummy transaction at this point because we
+ * can't start trying to idle the log until both the CIL and AIL are empty.
*/
int
xfs_log_need_covered(xfs_mount_t *mp)
{
- int needed = 0;
struct xlog *log = mp->m_log;
+ int needed = 0;

if (!xfs_fs_writable(mp))
return 0;

+ if (!xlog_cil_empty(log))
+ return 0;
+
spin_lock(&log->l_icloglock);
switch (log->l_covered_state) {
case XLOG_STATE_COVER_DONE:
@@ -1029,14 +1036,17 @@ xfs_log_need_covered(xfs_mount_t *mp)
break;
case XLOG_STATE_COVER_NEED:
case XLOG_STATE_COVER_NEED2:
- if (!xfs_ail_min_lsn(log->l_ailp) &&
- xlog_iclogs_empty(log)) {
- if (log->l_covered_state == XLOG_STATE_COVER_NEED)
- log->l_covered_state = XLOG_STATE_COVER_DONE;
- else
- log->l_covered_state = XLOG_STATE_COVER_DONE2;
- }
- /* FALLTHRU */
+ if (xfs_ail_min_lsn(log->l_ailp))
+ break;
+ if (!xlog_iclogs_empty(log))
+ break;
+
+ needed = 1;
+ if (log->l_covered_state == XLOG_STATE_COVER_NEED)
+ log->l_covered_state = XLOG_STATE_COVER_DONE;
+ else
+ log->l_covered_state = XLOG_STATE_COVER_DONE2;
+ break;
default:
needed = 1;
break;
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index cfe97973ba36..da8524e779b6 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -711,6 +711,20 @@ xlog_cil_push_foreground(
xlog_cil_push(log);
}

+bool
+xlog_cil_empty(
+ struct xlog *log)
+{
+ struct xfs_cil *cil = log->l_cilp;
+ bool empty = false;
+
+ spin_lock(&cil->xc_push_lock);
+ if (list_empty(&cil->xc_cil))
+ empty = true;
+ spin_unlock(&cil->xc_push_lock);
+ return empty;
+}
+
/*
* Commit a transaction with the given vector to the Committed Item List.
*
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 136654b9400d..f80cff26fda9 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -514,12 +514,10 @@ xlog_assign_grant_head(atomic64_t *head, int cycle, int space)
/*
* Committed Item List interfaces
*/
-int
-xlog_cil_init(struct xlog *log);
-void
-xlog_cil_init_post_recovery(struct xlog *log);
-void
-xlog_cil_destroy(struct xlog *log);
+int xlog_cil_init(struct xlog *log);
+void xlog_cil_init_post_recovery(struct xlog *log);
+void xlog_cil_destroy(struct xlog *log);
+bool xlog_cil_empty(struct xlog *log);

/*
* CIL force routines

[Jiri Slaby]

From: Eric Sandeen <***@sandeen.net>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 31625f28ad7be67701dc4cefcf52087addd88af4 upstream.

If we get EWRONGFS due to probing of non-xfs filesystems,
there's no need to issue the scary corruption error and backtrace.

Signed-off-by: Eric Sandeen <***@redhat.com>
Reviewed-by: Mark Tinguely <***@sgi.com>
Reviewed-by: Christoph Hellwig <***@lst.de>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_sb.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_sb.c b/fs/xfs/xfs_sb.c
index 039708122038..38b7df67ba7c 100644
--- a/fs/xfs/xfs_sb.c
+++ b/fs/xfs/xfs_sb.c
@@ -633,8 +633,9 @@ xfs_sb_read_verify(

out_error:
if (error) {
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
- mp, bp->b_addr);
+ if (error != EWRONGFS)
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
+ mp, bp->b_addr);
xfs_buf_ioerror(bp, error);
}
}

[Jiri Slaby]

From: Eric Sandeen <***@sandeen.net>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 59e5a0e821d838854b3afd030d31f82cee3ecd58 upstream.

When xfs_growfs_data_private() is updating backup superblocks,
it bails out on the first error encountered, whether reading or
writing:

* If we get an error writing out the alternate superblocks,
* just issue a warning and continue. The real work is
* already done and committed.

This can cause a problem later during repair, because repair
looks at all superblocks, and picks the most prevalent one
as correct. If we bail out early in the backup superblock
loop, we can end up with more "bad" matching superblocks than
good, and a post-growfs repair may revert the filesystem to
the old geometry.

With the combination of superblock verifiers and old bugs,
we're more likely to encounter read errors due to verification.

And perhaps even worse, we don't even properly write any of the
newly-added superblocks in the new AGs.

Even with this change, growfs will still say:

xfs_growfs: XFS_IOC_FSGROWFSDATA xfsctl failed: Structure needs cleaning
data blocks changed from 319815680 to 335216640

which might be confusing to the user, but it at least communicates
that something has gone wrong, and dmesg will probably highlight
the need for an xfs_repair.

And this is still best-effort; if verifiers fail on more than
half the backup supers, they may still "win" - but that's probably
best left to repair to more gracefully handle by doing its own
strict verification as part of the backup super "voting."

Signed-off-by: Eric Sandeen <***@redhat.com>
Acked-by: Dave Chinner <***@fromorbit.com>
Reviewed-by: Mark Tinguely <***@sgi.com>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_fsops.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index c888040a1e93..20ccca12a11d 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -153,7 +153,7 @@ xfs_growfs_data_private(
xfs_buf_t *bp;
int bucket;
int dpct;
- int error;
+ int error, saved_error = 0;
xfs_agnumber_t nagcount;
xfs_agnumber_t nagimax = 0;
xfs_rfsblock_t nb, nb_mod;
@@ -500,29 +500,33 @@ xfs_growfs_data_private(
error = ENOMEM;
}

+ /*
+ * If we get an error reading or writing alternate superblocks,
+ * continue. xfs_repair chooses the "best" superblock based
+ * on most matches; if we break early, we'll leave more
+ * superblocks un-updated than updated, and xfs_repair may
+ * pick them over the properly-updated primary.
+ */
if (error) {
xfs_warn(mp,
"error %d reading secondary superblock for ag %d",
error, agno);
- break;
+ saved_error = error;
+ continue;
}
xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);

- /*
- * If we get an error writing out the alternate superblocks,
- * just issue a warning and continue. The real work is
- * already done and committed.
- */
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error) {
xfs_warn(mp,
"write error %d updating secondary superblock for ag %d",
error, agno);
- break; /* no point in continuing */
+ saved_error = error;
+ continue;
}
}
- return error;
+ return saved_error ? saved_error : error;

error0:
xfs_trans_cancel(tp, XFS_TRANS_ABORT);

[Jiri Slaby]

From: Viresh Kumar <***@linaro.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 27630532ef5ead28b98cfe28d8f95222ef91c2b7 upstream.

Since commit d689fe222 (NOHZ: Check for nohz active instead of nohz
enabled) the tick_nohz_switch_to_nohz() function returns because it
checks for the tick_nohz_active flag. This can't be set, because the
function itself sets it.

Undo the change in tick_nohz_switch_to_nohz().

Signed-off-by: Viresh Kumar <***@linaro.org>
Cc: linaro-***@lists.linaro.org
Cc: ***@gmail.com
Cc: ***@arm.com
Cc: linaro-***@linaro.org
Cc: <***@vger.kernel.org> # 3.13+
Link: http://lkml.kernel.org/r/***@linaro.org
Signed-off-by: Thomas Gleixner <***@linutronix.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/time/tick-sched.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index ea20f7d1ac2c..29b063b32ff0 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -970,7 +970,7 @@ static void tick_nohz_switch_to_nohz(void)
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
ktime_t next;

- if (!tick_nohz_active)
+ if (!tick_nohz_enabled)
return;

local_irq_disable();

[Jiri Slaby]

From: Li Zhong <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4fb8d027dca0236c811272d342cf185569d91311 upstream.

commit 41dd03a9 may cause Oops in rtas_stop_self().

The reason is that the rtas_args was moved into stack space. For a box
with more that 4GB RAM, the stack could easily be outside 32bit range,
but RTAS is 32bit.

So the patch moves rtas_args away from stack by adding static before
it.

Signed-off-by: Li Zhong <***@linux.vnet.ibm.com>
Signed-off-by: Anton Blanchard <***@samba.org>
Cc: ***@vger.kernel.org # 3.14+
Signed-off-by: Benjamin Herrenschmidt <***@kernel.crashing.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 0ea99e3d4815..2d6fe89ff89d 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -88,13 +88,14 @@ void set_default_offline_state(int cpu)

static void rtas_stop_self(void)
{
- struct rtas_args args = {
- .token = cpu_to_be32(rtas_stop_self_token),
+ static struct rtas_args args = {
.nargs = 0,
.nret = 1,
.rets = &args.args[0],
};

+ args.token = cpu_to_be32(rtas_stop_self_token);
+
local_irq_disable();

BUG_ON(rtas_stop_self_token == RTAS_UNKNOWN_SERVICE);

[Jiri Slaby]

From: "Geyslan G. Bem" <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 643f7c4e5656bd18c769211f933190f7bb738245 upstream.

In xlog_verify_iclog a debug check of the incore log buffers prints an
error if icptr is null and then goes on to dereference the pointer
regardless. Convert this to an assert so that the intention is clear.
This was reported by Coverty.

Signed-off-by: Ben Myers <***@sgi.com>
Reviewed-by: Eric Sandeen <***@redhat.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_log.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 613ed9414e70..3c4ddc1c79a4 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -3712,11 +3712,9 @@ xlog_verify_iclog(
/* check validity of iclog pointers */
spin_lock(&log->l_icloglock);
icptr = log->l_iclog;
- for (i=0; i < log->l_iclog_bufs; i++) {
- if (icptr == NULL)
- xfs_emerg(log->l_mp, "%s: invalid ptr", __func__);
- icptr = icptr->ic_next;
- }
+ for (i = 0; i < log->l_iclog_bufs; i++, icptr = icptr->ic_next)
+ ASSERT(icptr);
+
if (icptr != log->l_iclog)
xfs_emerg(log->l_mp, "%s: corrupt iclog ring", __func__);
spin_unlock(&log->l_icloglock);

[Jiri Slaby]

From: Lars-Peter Clausen <***@metafoo.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fd9f26e4eca5d08a27d12c0933fceef76ed9663d upstream.

A control that is visible on the card->controls list can be freed at any time.
This means we must not access any of its memory while not holding the
controls_rw_lock. Otherwise we risk a use after free access.

Signed-off-by: Lars-Peter Clausen <***@metafoo.de>
Acked-by: Jaroslav Kysela <***@perex.cz>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/core/control.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/sound/core/control.c b/sound/core/control.c
index 15bc84492746..d4a597fe86e4 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -331,6 +331,7 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
{
struct snd_ctl_elem_id id;
unsigned int idx;
+ unsigned int count;
int err = -EINVAL;

if (! kcontrol)
@@ -359,8 +360,9 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
card->controls_count += kcontrol->count;
kcontrol->id.numid = card->last_numid + 1;
card->last_numid += kcontrol->count;
+ count = kcontrol->count;
up_write(&card->controls_rwsem);
- for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++)
+ for (idx = 0; idx < count; idx++, id.index++, id.numid++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
return 0;

@@ -389,6 +391,7 @@ int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol,
bool add_on_replace)
{
struct snd_ctl_elem_id id;
+ unsigned int count;
unsigned int idx;
struct snd_kcontrol *old;
int ret;
@@ -424,8 +427,9 @@ add:
card->controls_count += kcontrol->count;
kcontrol->id.numid = card->last_numid + 1;
card->last_numid += kcontrol->count;
+ count = kcontrol->count;
up_write(&card->controls_rwsem);
- for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++)
+ for (idx = 0; idx < count; idx++, id.index++, id.numid++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
return 0;

@@ -898,9 +902,9 @@ static int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file,
result = kctl->put(kctl, control);
}
if (result > 0) {
+ struct snd_ctl_elem_id id = control->id;
up_read(&card->controls_rwsem);
- snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
- &control->id);
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &id);
return 0;
}
}
@@ -1334,8 +1338,9 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file,
}
err = kctl->tlv.c(kctl, op_flag, tlv.length, _tlv->tlv);
if (err > 0) {
+ struct snd_ctl_elem_id id = kctl->id;
up_read(&card->controls_rwsem);
- snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_TLV, &kctl->id);
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_TLV, &id);
return 0;
}
} else {

[Jiri Slaby]

From: Lars-Peter Clausen <***@metafoo.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ac902c112d90a89e59916f751c2745f4dbdbb4bd upstream.

Each control gets automatically assigned its numids when the control is created.
The allocation is done by incrementing the numid by the amount of allocated
numids per allocation. This means that excessive creation and destruction of
controls (e.g. via SNDRV_CTL_IOCTL_ELEM_ADD/REMOVE) can cause the id to
eventually overflow. Currently when this happens for the control that caused the
overflow kctl->id.numid + kctl->count will also over flow causing it to be
smaller than kctl->id.numid. Most of the code assumes that this is something
that can not happen, so we need to make sure that it won't happen

Signed-off-by: Lars-Peter Clausen <***@metafoo.de>
Acked-by: Jaroslav Kysela <***@perex.cz>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/core/control.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/sound/core/control.c b/sound/core/control.c
index d4a597fe86e4..93215b4bec6b 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -289,6 +289,10 @@ static bool snd_ctl_remove_numid_conflict(struct snd_card *card,
{
struct snd_kcontrol *kctl;

+ /* Make sure that the ids assigned to the control do not wrap around */
+ if (card->last_numid >= UINT_MAX - count)
+ card->last_numid = 0;
+
list_for_each_entry(kctl, &card->controls, list) {
if (kctl->id.numid < card->last_numid + 1 + count &&
kctl->id.numid + kctl->count > card->last_numid + 1) {

[Jiri Slaby]

From: Tomas Winkler <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c40765d919d25d2d44d99c4ce39e48808f137e1e upstream.

According the spec the host should read H_CSR again
after asserting reset H_RST to ensure that reset was
read by the firmware

Cc: ***@vger.kernel.org #3.12
Signed-off-by: Tomas Winkler <***@intel.com>
Signed-off-by: Alexander Usyskin <***@intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/misc/mei/hw-me.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 6cba26d9465f..aef6ec137acd 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -186,7 +186,19 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
dev->recvd_hw_ready = false;
mei_me_reg_write(hw, H_CSR, hcsr);

- if (dev->dev_state == MEI_DEV_POWER_DOWN)
+ /*
+ * Host reads the H_CSR once to ensure that the
+ * posted write to H_CSR completes.
+ */
+ hcsr = mei_hcsr_read(hw);
+
+ if ((hcsr & H_RST) == 0)
+ dev_warn(&dev->pdev->dev, "H_RST is not set = 0x%08X", hcsr);
+
+ if ((hcsr & H_RDY) == H_RDY)
+ dev_warn(&dev->pdev->dev, "H_RDY is not cleared 0x%08X", hcsr);
+
+ if (intr_enable == false)
mei_me_hw_reset_release(dev);

return 0;

[Jiri Slaby]

From: Aaron Lu <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 545ef368e08fda654b6e63ce522c66339aa29156 upstream.

With commit 2c62333a408f "ACPI / video: Quirk initial backlight level 0"
we do not need to have the following systems in DMI table, so remove them.
HP Pavilion m4, HP 1000 Notebook PC, HP Pavilion g6 Notebook PC,
HP Pavilion dm4, Fujitsu E753, HP Folio 13-2000.

With this change, the use_bios_initial_backlight module parameter is no
longer needed and thus removed.

Signed-off-by: Aaron Lu <***@intel.com>
Tested-by: Alex Hung <***@canonical.com> # for HP 1000 Notebook PC
Tested-by: Gustavo Maciel Dias Vieira <***@sagui.org> # for HP Pavilion dm4
Signed-off-by: Rafael J. Wysocki <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>

Conflicts:
drivers/acpi/video.c
---
drivers/acpi/video.c | 87 ++++++++--------------------------------------------
1 file changed, 12 insertions(+), 75 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index d2e069044a0f..47e4deb9dfcd 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -81,13 +81,6 @@ module_param(brightness_switch_enabled, bool, 0644);
static bool allow_duplicates;
module_param(allow_duplicates, bool, 0644);

-/*
- * Some BIOSes claim they use minimum backlight at boot,
- * and this may bring dimming screen after boot
- */
-static bool use_bios_initial_backlight = 1;
-module_param(use_bios_initial_backlight, bool, 0644);
-
static int register_count;
static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device);
@@ -388,12 +381,6 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d)
return 0;
}

-static int video_ignore_initial_backlight(const struct dmi_system_id *d)
-{
- use_bios_initial_backlight = 0;
- return 0;
-}
-
static struct dmi_system_id video_dmi_table[] __initdata = {
/*
* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
@@ -438,54 +425,6 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
},
},
- {
- .callback = video_ignore_initial_backlight,
- .ident = "HP Folio 13-2000",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
- },
- },
- {
- .callback = video_ignore_initial_backlight,
- .ident = "Fujitsu E753",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
- DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
- },
- },
- {
- .callback = video_ignore_initial_backlight,
- .ident = "HP Pavilion dm4",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
- },
- },
- {
- .callback = video_ignore_initial_backlight,
- .ident = "HP Pavilion g6 Notebook PC",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"),
- },
- },
- {
- .callback = video_ignore_initial_backlight,
- .ident = "HP 1000 Notebook PC",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"),
- },
- },
- {
- .callback = video_ignore_initial_backlight,
- .ident = "HP Pavilion m4",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"),
- },
- },
{}
};

@@ -827,20 +766,18 @@ acpi_video_init_brightness(struct acpi_video_device *device)
if (!device->cap._BQC)
goto set_level;

- if (use_bios_initial_backlight) {
- level = acpi_video_bqc_value_to_level(device, level_old);
- /*
- * On some buggy laptops, _BQC returns an uninitialized
- * value when invoked for the first time, i.e.
- * level_old is invalid (no matter whether it's a level
- * or an index). Set the backlight to max_level in this case.
- */
- for (i = 2; i < br->count; i++)
- if (level == br->levels[i])
- break;
- if (i == br->count || !level)
- level = max_level;
- }
+ level = acpi_video_bqc_value_to_level(device, level_old);
+ /*
+ * On some buggy laptops, _BQC returns an uninitialized
+ * value when invoked for the first time, i.e.
+ * level_old is invalid (no matter whether it's a level
+ * or an index). Set the backlight to max_level in this case.
+ */
+ for (i = 2; i < br->count; i++)
+ if (level == br->levels[i])
+ break;
+ if (i == br->count || !level)
+ level = max_level;

set_level:
result = acpi_video_device_lcd_set_level(device, level);

[Jiri Slaby]

From: Tomas Winkler <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b04ada92ffaabb868497a1fce8e4f6bf74e5488f upstream

We cleared H_RST for H_CSR on spurious interrupt generated when ME_RDY
while cleared and not while ME_RDY is set. The spurious interrupt
is not delivered on all platforms in this case the
driver may fail to initialize.

Cc: ***@vger.kernel.org #3.12
Signed-off-by: Tomas Winkler <***@intel.com>
Signed-off-by: Alexander Usyskin <***@intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/misc/mei/hw-me.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index aef6ec137acd..e513354f20a7 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -164,6 +164,9 @@ static void mei_me_hw_reset_release(struct mei_device *dev)
hcsr |= H_IG;
hcsr &= ~H_RST;
mei_hcsr_set(hw, hcsr);
+
+ /* complete this write before we set host ready on another CPU */
+ mmiowb();
}
/**
* mei_me_hw_reset - resets fw via mei csr register.
@@ -214,6 +217,7 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
static void mei_me_host_set_ready(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
+ hw->host_hw_state = mei_hcsr_read(hw);
hw->host_hw_state |= H_IE | H_IG | H_RDY;
mei_hcsr_set(hw, hw->host_hw_state);
}
@@ -506,19 +510,15 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
/* check if we need to start the dev */
if (!mei_host_is_ready(dev)) {
if (mei_hw_is_ready(dev)) {
+ mei_me_hw_reset_release(dev);
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");

dev->recvd_hw_ready = true;
wake_up_interruptible(&dev->wait_hw_ready);
-
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
} else {
- dev_dbg(&dev->pdev->dev, "Reset Completed.\n");
- mei_me_hw_reset_release(dev);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
+ dev_dbg(&dev->pdev->dev, "Spurious Interrupt\n");
}
+ goto end;
}
/* check slots available for reading */
slots = mei_count_full_read_slots(dev);

[Jiri Slaby]

From: "J. Bruce Fields" <***@fieldses.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d57b9c9a999a8f4475fe73fba629c964245800ca upstream.

0d0d110720d7960b77c03c9f2597faaff4b484ae asserts that "d_splice_alias()
can't return error unless it was given an IS_ERR(inode)".

That was true of the implementation of d_splice_alias, but this is
really a problem with d_splice_alias: at a minimum it should be able to
return -ELOOP in the case where inserting the given dentry would cause a
directory loop.

Signed-off-by: J. Bruce Fields <***@redhat.com>
Signed-off-by: Steven Whitehouse <***@redhat.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/gfs2/inode.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 630db362a2d1..e803e3cafc53 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -583,6 +583,9 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
error = PTR_ERR(inode);
if (!IS_ERR(inode)) {
d = d_splice_alias(inode, dentry);
+ error = PTR_ERR(d);
+ if (IS_ERR(d))
+ goto fail_gunlock;
error = 0;
if (file) {
if (S_ISREG(inode->i_mode)) {
@@ -777,6 +780,11 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
}

d = d_splice_alias(inode, dentry);
+ if (IS_ERR(d)) {
+ iput(inode);
+ gfs2_glock_dq_uninit(&gh);
+ return d;
+ }
if (file && S_ISREG(inode->i_mode))
error = finish_open(file, dentry, gfs2_open_common, opened);

[Jiri Slaby]

From: Aleksander Morgado <***@aleksander.es>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 0ce5fb58564fd85aa8fd2d24209900e2e845317b upstream.

A set of new VID/PIDs retrieved from the out-of-tree GobiNet/GobiSerial
Sierra Wireless drivers.

Signed-off-by: Aleksander Morgado <***@aleksander.es>
Link: http://marc.info/?l=linux-usb&m=140136310027293&w=2
Cc: <***@vger.kernel.org> # backport in link above
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/serial/qcserial.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index 2029f8f7f53f..3e96d1a9cbdb 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -142,9 +142,15 @@ static const struct usb_device_id id_table[] = {
{DEVICE_SWI(0x1199, 0x68c0)}, /* Sierra Wireless MC73xx */
{DEVICE_SWI(0x1199, 0x901c)}, /* Sierra Wireless EM7700 */
{DEVICE_SWI(0x1199, 0x901f)}, /* Sierra Wireless EM7355 */
+ {DEVICE_SWI(0x1199, 0x9040)}, /* Sierra Wireless Modem */
{DEVICE_SWI(0x1199, 0x9041)}, /* Sierra Wireless MC7305/MC7355 */
{DEVICE_SWI(0x1199, 0x9051)}, /* Netgear AirCard 340U */
+ {DEVICE_SWI(0x1199, 0x9053)}, /* Sierra Wireless Modem */
+ {DEVICE_SWI(0x1199, 0x9054)}, /* Sierra Wireless Modem */
{DEVICE_SWI(0x1199, 0x9055)}, /* Netgear AirCard 341U */
+ {DEVICE_SWI(0x1199, 0x9056)}, /* Sierra Wireless Modem */
+ {DEVICE_SWI(0x1199, 0x9060)}, /* Sierra Wireless Modem */
+ {DEVICE_SWI(0x1199, 0x9061)}, /* Sierra Wireless Modem */
{DEVICE_SWI(0x413c, 0x81a2)}, /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
{DEVICE_SWI(0x413c, 0x81a3)}, /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
{DEVICE_SWI(0x413c, 0x81a4)}, /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */

[Jiri Slaby]

From: Lars-Peter Clausen <***@metafoo.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 82262a46627bebb0febcc26664746c25cef08563 upstream.

There are two issues with the current implementation for replacing user
controls. The first is that the code does not check if the control is actually a
user control and neither does it check if the control is owned by the process
that tries to remove it. That allows userspace applications to remove arbitrary
controls, which can cause a user after free if a for example a driver does not
expect a control to be removed from under its feed.

The second issue is that on one hand when a control is replaced the
user_ctl_count limit is not checked and on the other hand the user_ctl_count is
increased (even though the number of user controls does not change). This allows
userspace, once the user_ctl_count limit as been reached, to repeatedly replace
a control until user_ctl_count overflows. Once that happens new controls can be
added effectively bypassing the user_ctl_count limit.

Both issues can be fixed by instead of open-coding the removal of the control
that is to be replaced to use snd_ctl_remove_user_ctl(). This function does
proper permission checks as well as decrements user_ctl_count after the control
has been removed.

Note that by using snd_ctl_remove_user_ctl() the check which returns -EBUSY at
beginning of the function if the control already exists is removed. This is not
a problem though since the check is quite useless, because the lock that is
protecting the control list is released between the check and before adding the
new control to the list, which means that it is possible that a different
control with the same settings is added to the list after the check. Luckily
there is another check that is done while holding the lock in snd_ctl_add(), so
we'll rely on that to make sure that the same control is not added twice.

Signed-off-by: Lars-Peter Clausen <***@metafoo.de>
Acked-by: Jaroslav Kysela <***@perex.cz>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/core/control.c | 25 +++++++++----------------
1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/sound/core/control.c b/sound/core/control.c
index 183fab277b69..15bc84492746 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1155,8 +1155,6 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
struct user_element *ue;
int idx, err;

- if (!replace && card->user_ctl_count >= MAX_USER_CONTROLS)
- return -ENOMEM;
if (info->count < 1)
return -EINVAL;
access = info->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE :
@@ -1165,21 +1163,16 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE));
info->id.numid = 0;
memset(&kctl, 0, sizeof(kctl));
- down_write(&card->controls_rwsem);
- _kctl = snd_ctl_find_id(card, &info->id);
- err = 0;
- if (_kctl) {
- if (replace)
- err = snd_ctl_remove(card, _kctl);
- else
- err = -EBUSY;
- } else {
- if (replace)
- err = -ENOENT;
+
+ if (replace) {
+ err = snd_ctl_remove_user_ctl(file, &info->id);
+ if (err)
+ return err;
}
- up_write(&card->controls_rwsem);
- if (err < 0)
- return err;
+
+ if (card->user_ctl_count >= MAX_USER_CONTROLS)
+ return -ENOMEM;
+
memcpy(&kctl.id, &info->id, sizeof(info->id));
kctl.count = info->owner ? info->owner : 1;
access |= SNDRV_CTL_ELEM_ACCESS_USER;

[Jiri Slaby]

From: Ben Hutchings <***@solarflare.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 417c3522b3202dacce4873cfb0190459fbce95c5 upstream.

We don't need to check that ifr_data itself is a valid user pointer,
but we should check &ifr_data is. Thankfully the copy of ifr_name is
checked, so this can only leak a few bytes from immediately above the
user address limit.

Signed-off-by: Ben Hutchings <***@solarflare.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/socket.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index dc57dae20a9a..c8ca896a9a5a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3023,19 +3023,16 @@ static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
IFNAMSIZ))
return -EFAULT;
- if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
+ if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
return -EFAULT;
data64 = compat_ptr(data32);

u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));

- /* Don't check these user accesses, just let that get trapped
- * in the ioctl handler instead.
- */
if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
IFNAMSIZ))
return -EFAULT;
- if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
+ if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
return -EFAULT;

return dev_ioctl(net, cmd, u_ifreq64);

[Jiri Slaby]

From: Dave Chinner <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ad22c7a043c2cc6792820e6c5da699935933e87d upstream.

Page cache allocation doesn't always go through ->begin_write and
hence we don't always get the opportunity to set the allocation
context to GFP_NOFS. Failing to do this means we open up the direct
relcaim stack to recurse into the filesystem and consume a
significant amount of stack.

On RHEL6.4 kernels we are seeing ra_submit() and
generic_file_splice_read() from an nfsd context recursing into the
filesystem via the inode cache shrinker and evicting inodes. This is
causing truncation to be run (e.g EOF block freeing) and causing
bmap btree block merges and free space btree block splits to occur.
These btree manipulations are occurring with the call chain already
30 functions deep and hence there is not enough stack space to
complete such operations.

To avoid these specific overruns, we need to prevent the page cache
allocation from recursing via direct reclaim. We can do that because
the allocation functions take the allocation context from that which
is stored in the mapping for the inode. We don't set that right now,
so the default is GFP_HIGHUSER_MOVABLE, which is effectively a
GFP_KERNEL context. We need it to be the equivalent of GFP_NOFS, so
when we initialise an inode, set the mapping gfp mask appropriately.

This makes the use of AOP_FLAG_NOFS redundant from other parts of
the XFS IO path, so get rid of it.

Signed-off-by: Dave Chinner <***@redhat.com>
Reviewed-by: Christoph Hellwig <***@lst.de>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_aops.c | 3 +--
fs/xfs/xfs_iops.c | 9 +++++++++
2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index e51e581454e9..be9a1fa2721b 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1569,8 +1569,7 @@ xfs_vm_write_begin(

ASSERT(len <= PAGE_CACHE_SIZE);

- page = grab_cache_page_write_begin(mapping, index,
- flags | AOP_FLAG_NOFS);
+ page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
return -ENOMEM;

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 2b8952d9199b..584996c1bea7 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1169,6 +1169,7 @@ xfs_setup_inode(
struct xfs_inode *ip)
{
struct inode *inode = &ip->i_vnode;
+ gfp_t gfp_mask;

inode->i_ino = ip->i_ino;
inode->i_state = I_NEW;
@@ -1229,6 +1230,14 @@ xfs_setup_inode(
}

/*
+ * Ensure all page cache allocations are done from GFP_NOFS context to
+ * prevent direct reclaim recursion back into the filesystem and blowing
+ * stacks or deadlocking.
+ */
+ gfp_mask = mapping_gfp_mask(inode->i_mapping);
+ mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
+
+ /*
* If there is no attribute fork no ACL can exist on this inode,
* and it can't have any file capabilities attached to it either.
*/

[Jiri Slaby]

From: Jie Liu <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 17ec81c15fd022842f9bc947841ba9fb9eb52591 upstream.

At xfs_iext_realloc_direct(), the new_size is changed by adding
if_bytes if originally the extent records are stored at the inline
extent buffer, and we have to switch from it to a direct extent
list for those new allocated extents, this is wrong. e.g,

Create a file with three extents which was showing as following,

xfs_io -f -c "truncate 100m" /xfs/testme

for i in $(seq 0 5 10); do
offset=$(($i * $((1 << 20))))
xfs_io -c "pwrite $offset 1m" /xfs/testme
done

Inline
------
irec: if_bytes bytes_diff new_size
1st 0 16 16
2nd 16 16 32

Switching
--------- rnew_size
3rd 32 16 48 + 32 = 80 roundup=128

In this case, the desired value of new_size should be 48, and then
it will be roundup to 64 and be assigned to rnew_size.

However, this issue has been covered by resetting the if_bytes to
the new_size which is calculated at the begnning of xfs_iext_add()
before leaving out this function, and in turn make the rnew_size
correctly again. Hence, this can not be detected via xfstestes.

This patch fix above problem and revise the new_size comments at
xfs_iext_realloc_direct() to make it more readable. Also, fix the
comments while switching from the inline extent buffer to a direct
extent list to reflect this change.

Signed-off-by: Jie Liu <***@oracle.com>
Reviewed-by: Dave Chinner <***@redhat.com>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_inode_fork.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/xfs_inode_fork.c
index 02f1083955bb..4fa56fcb38d1 100644
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/xfs_inode_fork.c
@@ -1359,7 +1359,7 @@ xfs_iext_remove_indirect(
void
xfs_iext_realloc_direct(
xfs_ifork_t *ifp, /* inode fork pointer */
- int new_size) /* new size of extents */
+ int new_size) /* new size of extents after adding */
{
int rnew_size; /* real new size of extents */

@@ -1397,13 +1397,8 @@ xfs_iext_realloc_direct(
rnew_size - ifp->if_real_bytes);
}
}
- /*
- * Switch from the inline extent buffer to a direct
- * extent list. Be sure to include the inline extent
- * bytes in new_size.
- */
+ /* Switch from the inline extent buffer to a direct extent list */
else {
- new_size += ifp->if_bytes;
if (!is_power_of_2(new_size)) {
rnew_size = roundup_pow_of_two(new_size);
}

[Jiri Slaby]

From: Lars-Peter Clausen <***@metafoo.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 883a1d49f0d77d30012f114b2e19fc141beb3e8e upstream.

The ALSA control code expects that the range of assigned indices to a control is
continuous and does not overflow. Currently there are no checks to enforce this.
If a control with a overflowing index range is created that control becomes
effectively inaccessible and unremovable since snd_ctl_find_id() will not be
able to find it. This patch adds a check that makes sure that controls with a
overflowing index range can not be created.

Signed-off-by: Lars-Peter Clausen <***@metafoo.de>
Acked-by: Jaroslav Kysela <***@perex.cz>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/core/control.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/sound/core/control.c b/sound/core/control.c
index 93215b4bec6b..98a29b26c5f4 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -343,6 +343,9 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
if (snd_BUG_ON(!card || !kcontrol->info))
goto error;
id = kcontrol->id;
+ if (id.index > UINT_MAX - kcontrol->count)
+ goto error;
+
down_write(&card->controls_rwsem);
if (snd_ctl_find_id(card, &id)) {
up_write(&card->controls_rwsem);

[Jiri Slaby]

From: Jie Liu <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bb86d21cba22a045b09d11b71decf5ca7c3d5def upstream.

At xfs_iext_add(), if extent(s) are being appended to the last page in
the indirection array and the new extent(s) don't fit in the page, the
number of extents(erp->er_extcount) in a new allocated entry should be
the minimum value between count and XFS_LINEAR_EXTS, instead of count.

For now, there is no existing test case can demonstrates a problem with
the er_extcount being set incorrectly here, but it obviously like a bug.

Signed-off-by: Jie Liu <***@oracle.com>
Reviewed-by: Ben Myers <***@sgi.com>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_inode_fork.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/xfs_inode_fork.c
index 4fa56fcb38d1..6829134de253 100644
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/xfs_inode_fork.c
@@ -1031,15 +1031,14 @@ xfs_iext_add(
* the next index needed in the indirection array.
*/
else {
- int count = ext_diff;
+ uint count = ext_diff;

while (count) {
erp = xfs_iext_irec_new(ifp, erp_idx);
- erp->er_extcount = count;
- count -= MIN(count, (int)XFS_LINEAR_EXTS);
- if (count) {
+ erp->er_extcount = min(count, XFS_LINEAR_EXTS);
+ count -= erp->er_extcount;
+ if (count)
erp_idx++;
- }
}
}
}

[Jiri Slaby]

From: Tim Kryger <***@linaro.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c49436b657d0a56a6ad90d14a7c3041add7cf64d upstream.

When configured with UART_16550_COMPATIBLE=NO or in versions prior to
the introduction of this option, the Designware UART will ignore writes
to the LCR if the UART is busy. The current workaround saves a copy of
the last written LCR and re-writes it in the ISR for a special interrupt
that is raised when a write was ignored.

Unfortunately, interrupts are typically disabled prior to performing a
sequence of register writes that include the LCR so the point at which
the retry occurs is too late. An example is serial8250_do_set_termios()
where an ignored LCR write results in the baud divisor not being set and
instead a garbage character is sent out the transmitter.

Furthermore, since serial_port_out() offers no way to indicate failure,
a serious effort must be made to ensure that the LCR is actually updated
before returning back to the caller. This is difficult, however, as a
UART that was busy during the first attempt is likely to still be busy
when a subsequent attempt is made unless some extra action is taken.

This updated workaround reads back the LCR after each write to confirm
that the new value was accepted by the hardware. Should the hardware
ignore a write, the TX/RX FIFOs are cleared and the receive buffer read
before attempting to rewrite the LCR out of the hope that doing so will
force the UART into an idle state. While this may seem unnecessarily
aggressive, writes to the LCR are used to change the baud rate, parity,
stop bit, or data length so the data that may be lost is likely not
important. Admittedly, this is far from ideal but it seems to be the
best that can be done given the hardware limitations.

Lastly, the revised workaround doesn't touch the LCR in the ISR, so it
avoids the possibility of a "serial8250: too much work for irq" lock up.
This problem is rare in real situations but can be reproduced easily by
wiring up two UARTs and running the following commands.

# stty -F /dev/ttyS1 echo
# stty -F /dev/ttyS2 echo
# cat /dev/ttyS1 &
[1] 375
# echo asdf > /dev/ttyS1
asdf

[ 27.700000] serial8250: too much work for irq96
[ 27.700000] serial8250: too much work for irq96
[ 27.710000] serial8250: too much work for irq96
[ 27.710000] serial8250: too much work for irq96
[ 27.720000] serial8250: too much work for irq96
[ 27.720000] serial8250: too much work for irq96
[ 27.730000] serial8250: too much work for irq96
[ 27.730000] serial8250: too much work for irq96
[ 27.740000] serial8250: too much work for irq96

Signed-off-by: Tim Kryger <***@linaro.org>
Reviewed-by: Matt Porter <***@linaro.org>
Reviewed-by: Markus Mayer <***@linaro.org>
Reviewed-by: Heikki Krogerus <***@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>

Conflicts:
drivers/tty/serial/8250/8250_dw.c
---
drivers/tty/serial/8250/8250_dw.c | 41 ++++++++++++++++++++++++++++++---------
1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 8b2accbad3d1..1dec9af3c9ab 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -56,7 +56,6 @@


struct dw8250_data {
- int last_lcr;
int last_mcr;
int line;
struct clk *clk;
@@ -76,17 +75,33 @@ static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value)
return value;
}

+static void dw8250_force_idle(struct uart_port *p)
+{
+ serial8250_clear_and_reinit_fifos(container_of
+ (p, struct uart_8250_port, port));
+ (void)p->serial_in(p, UART_RX);
+}
+
static void dw8250_serial_out(struct uart_port *p, int offset, int value)
{
struct dw8250_data *d = p->private_data;

- if (offset == UART_LCR)
- d->last_lcr = value;
-
if (offset == UART_MCR)
d->last_mcr = value;

writeb(value, p->membase + (offset << p->regshift));
+
+ /* Make sure LCR write wasn't ignored */
+ if (offset == UART_LCR) {
+ int tries = 1000;
+ while (tries--) {
+ if (value == p->serial_in(p, UART_LCR))
+ return;
+ dw8250_force_idle(p);
+ writeb(value, p->membase + (UART_LCR << p->regshift));
+ }
+ dev_err(p->dev, "Couldn't set LCR to %d\n", value);
+ }
}

static unsigned int dw8250_serial_in(struct uart_port *p, int offset)
@@ -107,13 +122,22 @@ static void dw8250_serial_out32(struct uart_port *p, int offset, int value)
{
struct dw8250_data *d = p->private_data;

- if (offset == UART_LCR)
- d->last_lcr = value;
-
if (offset == UART_MCR)
d->last_mcr = value;

writel(value, p->membase + (offset << p->regshift));
+
+ /* Make sure LCR write wasn't ignored */
+ if (offset == UART_LCR) {
+ int tries = 1000;
+ while (tries--) {
+ if (value == p->serial_in(p, UART_LCR))
+ return;
+ dw8250_force_idle(p);
+ writel(value, p->membase + (UART_LCR << p->regshift));
+ }
+ dev_err(p->dev, "Couldn't set LCR to %d\n", value);
+ }
}

static unsigned int dw8250_serial_in32(struct uart_port *p, int offset)
@@ -131,9 +155,8 @@ static int dw8250_handle_irq(struct uart_port *p)
if (serial8250_handle_irq(p, iir)) {
return 1;
} else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) {
- /* Clear the USR and write the LCR again. */
+ /* Clear the USR */
(void)p->serial_in(p, d->usr_reg);
- p->serial_out(p, UART_LCR, d->last_lcr);

return 1;
}

[Jiri Slaby]

From: Lars-Peter Clausen <***@metafoo.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 07f4d9d74a04aa7c72c5dae0ef97565f28f17b92 upstream.

The user-control put and get handlers as well as the tlv do not protect against
concurrent access from multiple threads. Since the state of the control is not
updated atomically it is possible that either two write operations or a write
and a read operation race against each other. Both can lead to arbitrary memory
disclosure. This patch introduces a new lock that protects user-controls from
concurrent access. Since applications typically access controls sequentially
than in parallel a single lock per card should be fine.

Signed-off-by: Lars-Peter Clausen <***@metafoo.de>
Acked-by: Jaroslav Kysela <***@perex.cz>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/sound/core.h | 2 ++
sound/core/control.c | 31 +++++++++++++++++++++++++------
sound/core/init.c | 1 +
3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/include/sound/core.h b/include/sound/core.h
index 2a14f1f02d4f..d6bc9616058b 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -121,6 +121,8 @@ struct snd_card {
int user_ctl_count; /* count of all user controls */
struct list_head controls; /* all controls for this card */
struct list_head ctl_files; /* active control files */
+ struct mutex user_ctl_lock; /* protects user controls against
+ concurrent access */

struct snd_info_entry *proc_root; /* root for soundcard specific files */
struct snd_info_entry *proc_id; /* the card id */
diff --git a/sound/core/control.c b/sound/core/control.c
index d8aa206e8bde..183fab277b69 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -992,6 +992,7 @@ static int snd_ctl_elem_unlock(struct snd_ctl_file *file,

struct user_element {
struct snd_ctl_elem_info info;
+ struct snd_card *card;
void *elem_data; /* element data */
unsigned long elem_data_size; /* size of element data in bytes */
void *tlv_data; /* TLV data */
@@ -1035,7 +1036,9 @@ static int snd_ctl_elem_user_get(struct snd_kcontrol *kcontrol,
{
struct user_element *ue = kcontrol->private_data;

+ mutex_lock(&ue->card->user_ctl_lock);
memcpy(&ucontrol->value, ue->elem_data, ue->elem_data_size);
+ mutex_unlock(&ue->card->user_ctl_lock);
return 0;
}

@@ -1044,10 +1047,12 @@ static int snd_ctl_elem_user_put(struct snd_kcontrol *kcontrol,
{
int change;
struct user_element *ue = kcontrol->private_data;
-
+
+ mutex_lock(&ue->card->user_ctl_lock);
change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size) != 0;
if (change)
memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size);
+ mutex_unlock(&ue->card->user_ctl_lock);
return change;
}

@@ -1067,19 +1072,32 @@ static int snd_ctl_elem_user_tlv(struct snd_kcontrol *kcontrol,
new_data = memdup_user(tlv, size);
if (IS_ERR(new_data))
return PTR_ERR(new_data);
+ mutex_lock(&ue->card->user_ctl_lock);
change = ue->tlv_data_size != size;
if (!change)
change = memcmp(ue->tlv_data, new_data, size);
kfree(ue->tlv_data);
ue->tlv_data = new_data;
ue->tlv_data_size = size;
+ mutex_unlock(&ue->card->user_ctl_lock);
} else {
- if (! ue->tlv_data_size || ! ue->tlv_data)
- return -ENXIO;
- if (size < ue->tlv_data_size)
- return -ENOSPC;
+ int ret = 0;
+
+ mutex_lock(&ue->card->user_ctl_lock);
+ if (!ue->tlv_data_size || !ue->tlv_data) {
+ ret = -ENXIO;
+ goto err_unlock;
+ }
+ if (size < ue->tlv_data_size) {
+ ret = -ENOSPC;
+ goto err_unlock;
+ }
if (copy_to_user(tlv, ue->tlv_data, ue->tlv_data_size))
- return -EFAULT;
+ ret = -EFAULT;
+err_unlock:
+ mutex_unlock(&ue->card->user_ctl_lock);
+ if (ret)
+ return ret;
}
return change;
}
@@ -1211,6 +1229,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
ue = kzalloc(sizeof(struct user_element) + private_size, GFP_KERNEL);
if (ue == NULL)
return -ENOMEM;
+ ue->card = card;
ue->info = *info;
ue->info.access = 0;
ue->elem_data = (char *)ue + sizeof(*ue);
diff --git a/sound/core/init.c b/sound/core/init.c
index d04785144601..b9268a55126b 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -215,6 +215,7 @@ int snd_card_create(int idx, const char *xid,
INIT_LIST_HEAD(&card->devices);
init_rwsem(&card->controls_rwsem);
rwlock_init(&card->ctl_files_rwlock);
+ mutex_init(&card->user_ctl_lock);
INIT_LIST_HEAD(&card->controls);
INIT_LIST_HEAD(&card->ctl_files);
spin_lock_init(&card->files_lock);

[Jiri Slaby]

From: Peter Ujfalusi <***@ti.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e6c111fac4464e3f4bf7b3802b517dafc80f8e0f upstream.

For some unknown reason the parameters for snd_soc_test_bits() were in wrong
order:
It was:
snd_soc_test_bits(codec, val, mask, reg); /* WRONG!!! */
while it should be:
snd_soc_test_bits(codec, reg, mask, val);

Signed-off-by: Peter Ujfalusi <***@ti.com>
Signed-off-by: Mark Brown <***@linaro.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/soc/codecs/tlv320aic3x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 64ad84d8a306..11c8d1fe9222 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -164,7 +164,7 @@ static int snd_soc_dapm_put_volsw_aic3x(struct snd_kcontrol *kcontrol,
mask <<= shift;
val <<= shift;

- change = snd_soc_test_bits(codec, val, mask, reg);
+ change = snd_soc_test_bits(codec, reg, mask, val);
if (change) {
update.kcontrol = kcontrol;
update.reg = reg;

[Jiri Slaby]

From: Jie Liu <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit f9fd0135610084abef6867d984e9951c3099950d upstream.

For discard operation, we should return EINVAL if the given range length
is less than a block size, otherwise it will go through the file system
to discard data blocks as the end range might be evaluated to -1, e.g,
/xfs7: 9811378176 bytes were trimmed

This issue can be triggered via xfstests/generic/288.

Also, it seems to get the request queue pointer via bdev_get_queue()
instead of the hard code pointer dereference is not a bad thing.

Signed-off-by: Jie Liu <***@oracle.com>
Reviewed-by: Christoph Hellwig <***@lst.de>
Signed-off-by: Ben Myers <***@sgi.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/xfs/xfs_discard.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 45560ee1a4ba..19d9fd6caf8c 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -158,7 +158,7 @@ xfs_ioc_trim(
struct xfs_mount *mp,
struct fstrim_range __user *urange)
{
- struct request_queue *q = mp->m_ddev_targp->bt_bdev->bd_disk->queue;
+ struct request_queue *q = bdev_get_queue(mp->m_ddev_targp->bt_bdev);
unsigned int granularity = q->limits.discard_granularity;
struct fstrim_range range;
xfs_daddr_t start, end, minlen;
@@ -181,7 +181,8 @@ xfs_ioc_trim(
* matter as trimming blocks is an advisory interface.
*/
if (range.start >= XFS_FSB_TO_B(mp, mp->m_sb.sb_dblocks) ||
- range.minlen > XFS_FSB_TO_B(mp, XFS_ALLOC_AG_MAX_USABLE(mp)))
+ range.minlen > XFS_FSB_TO_B(mp, XFS_ALLOC_AG_MAX_USABLE(mp)) ||
+ range.len < mp->m_sb.sb_blocksize)
return -XFS_ERROR(EINVAL);

start = BTOBB(range.start);

[Jiri Slaby]

From: Prarit Bhargava <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 00159a2013269bc0a617de885e4b921349192bd0 upstream.

When booting a kexec/kdump kernel on a system that has specific memory
hotplug regions the boot will fail with warnings like:

swapper/0: page allocation failure: order:9, mode:0x84d0
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-65.el7.x86_64 #1
Hardware name: QCI QSSC-S4R/QSSC-S4R, BIOS QSSC-S4R.QCI.01.00.S013.032920111005 03/29/2011
0000000000000000 ffff8800341bd8c8 ffffffff815bcc67 ffff8800341bd950
ffffffff8113b1a0 ffff880036339b00 0000000000000009 00000000000084d0
ffff8800341bd950 ffffffff815b87ee 0000000000000000 0000000000000200
Call Trace:
[<ffffffff815bcc67>] dump_stack+0x19/0x1b
[<ffffffff8113b1a0>] warn_alloc_failed+0xf0/0x160
[<ffffffff815b87ee>] ? __alloc_pages_direct_compact+0xac/0x196
[<ffffffff8113f14f>] __alloc_pages_nodemask+0x7ff/0xa00
[<ffffffff815b417c>] vmemmap_alloc_block+0x62/0xba
[<ffffffff815b41e9>] vmemmap_alloc_block_buf+0x15/0x3b
[<ffffffff815b1ff6>] vmemmap_populate+0xb4/0x21b
[<ffffffff815b461d>] sparse_mem_map_populate+0x27/0x35
[<ffffffff815b400f>] sparse_add_one_section+0x7a/0x185
[<ffffffff815a1e9f>] __add_pages+0xaf/0x240
[<ffffffff81047359>] arch_add_memory+0x59/0xd0
[<ffffffff815a21d9>] add_memory+0xb9/0x1b0
[<ffffffff81333b9c>] acpi_memory_device_add+0x18d/0x26d
[<ffffffff81309a01>] acpi_bus_device_attach+0x7d/0xcd
[<ffffffff8132379d>] acpi_ns_walk_namespace+0xc8/0x17f
[<ffffffff81309984>] ? acpi_bus_type_and_status+0x90/0x90
[<ffffffff81309984>] ? acpi_bus_type_and_status+0x90/0x90
[<ffffffff81323c8c>] acpi_walk_namespace+0x95/0xc5
[<ffffffff8130a6d6>] acpi_bus_scan+0x8b/0x9d
[<ffffffff81a2019a>] acpi_scan_init+0x63/0x160
[<ffffffff81a1ffb5>] acpi_init+0x25d/0x2a6
[<ffffffff81a1fd58>] ? acpi_sleep_proc_init+0x2a/0x2a
[<ffffffff810020e2>] do_one_initcall+0xe2/0x190
[<ffffffff819e20c4>] kernel_init_freeable+0x17c/0x207
[<ffffffff819e18d0>] ? do_early_param+0x88/0x88
[<ffffffff8159fea0>] ? rest_init+0x80/0x80
[<ffffffff8159feae>] kernel_init+0xe/0x180
[<ffffffff815cca2c>] ret_from_fork+0x7c/0xb0
[<ffffffff8159fea0>] ? rest_init+0x80/0x80
Mem-Info:
Node 0 DMA per-cpu:
CPU 0: hi: 0, btch: 1 usd: 0
Node 0 DMA32 per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
active_anon:0 inactive_anon:0 isolated_anon:0
active_file:0 inactive_file:0 isolated_file:0
unevictable:0 dirty:0 writeback:0 unstable:0
free:872 slab_reclaimable:13 slab_unreclaimable:1880
mapped:0 shmem:0 pagetables:0 bounce:0
free_cma:0

because the system has run out of memory at boot time. This occurs
because of the following sequence in the boot:

Main kernel boots and sets E820 map. The second kernel is booted with a
map generated by the kdump service using memmap= and memmap=exactmap.
These parameters are added to the kernel parameters of the kexec/kdump
kernel. The kexec/kdump kernel has limited memory resources so as not
to severely impact the main kernel.

The system then panics and the kdump/kexec kernel boots (which is a
completely new kernel boot). During this boot ACPI is initialized and the
kernel (as can be seen above) traverses the ACPI namespace and finds an
entry for a memory device to be hotadded.

ie)

[<ffffffff815a1e9f>] __add_pages+0xaf/0x240
[<ffffffff81047359>] arch_add_memory+0x59/0xd0
[<ffffffff815a21d9>] add_memory+0xb9/0x1b0
[<ffffffff81333b9c>] acpi_memory_device_add+0x18d/0x26d
[<ffffffff81309a01>] acpi_bus_device_attach+0x7d/0xcd
[<ffffffff8132379d>] acpi_ns_walk_namespace+0xc8/0x17f
[<ffffffff81309984>] ? acpi_bus_type_and_status+0x90/0x90
[<ffffffff81309984>] ? acpi_bus_type_and_status+0x90/0x90
[<ffffffff81323c8c>] acpi_walk_namespace+0x95/0xc5
[<ffffffff8130a6d6>] acpi_bus_scan+0x8b/0x9d
[<ffffffff81a2019a>] acpi_scan_init+0x63/0x160
[<ffffffff81a1ffb5>] acpi_init+0x25d/0x2a6

At this point the kernel adds page table information and the the kexec/kdump
kernel runs out of memory.

This can also be reproduced by using the memmap=exactmap and mem=X
parameters on the main kernel and booting.

This patchset resolves the problem by adding a kernel parameter,
acpi_no_memhotplug, to disable ACPI memory hotplug.

Signed-off-by: Prarit Bhargava <***@redhat.com>
Acked-by: Vivek Goyal <***@redhat.com>
Acked-by: Toshi Kani <***@hp.com>
Acked-by: David Rientjes <***@google.com>
Signed-off-by: Rafael J. Wysocki <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
Documentation/kernel-parameters.txt | 3 +++
drivers/acpi/acpi_memhotplug.c | 12 ++++++++++++
2 files changed, 15 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4f7c57cb6022..789b8941a0c6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -343,6 +343,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
no: ACPI OperationRegions are not marked as reserved,
no further checks are performed.

+ acpi_no_memhotplug [ACPI] Disable memory hotplug. Useful for kdump
+ kernels.
+
add_efi_memmap [EFI; X86] Include EFI memory map in
kernel's map of available physical RAM.

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 999adb5499c7..1a8cdf9f94c3 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -360,7 +360,19 @@ static void acpi_memory_device_remove(struct acpi_device *device)
acpi_memory_device_free(mem_device);
}

+static bool __initdata acpi_no_memhotplug;
+
void __init acpi_memory_hotplug_init(void)
{
+ if (acpi_no_memhotplug)
+ return;
+
acpi_scan_add_handler_with_hotplug(&memory_device_handler, "memory");
}
+
+static int __init disable_acpi_memory_hotplug(char *str)
+{
+ acpi_no_memhotplug = true;
+ return 1;
+}
+__setup("acpi_no_memhotplug", disable_acpi_memory_hotplug);

[Jiri Slaby]

=46rom: David Henningsson <***@canonical.com>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit 2041d56464a067461d7cc21734a0f024587ed2ff upstream.

According to the bug reporter (=D0=94=D0=B0=D0=BD=D0=B8=D0=BB=D0=BE =D0=
=A8=D0=B5=D0=B3=D0=B0=D0=BD), the external mic
starts to work and has proper jack detection if only pin 0x19
is marked properly as an external headset mic.

AlsaInfo at https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1=
328587/+attachment/4128991/+files/AlsaInfo.txt

BugLink: https://bugs.launchpad.net/bugs/1328587
Signed-off-by: David Henningsson <***@canonical.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_realtek.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realte=
k.c
index e19001f9203c..b8a5f1d02b18 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3689,6 +3689,7 @@ enum {
ALC269_FIXUP_HEADSET_MIC,
ALC269_FIXUP_QUANTA_MUTE,
ALC269_FIXUP_LIFEBOOK,
+ ALC269_FIXUP_LIFEBOOK_EXTMIC,
ALC269_FIXUP_AMIC,
ALC269_FIXUP_DMIC,
ALC269VB_FIXUP_AMIC,
@@ -3806,6 +3807,13 @@ static const struct hda_fixup alc269_fixups[] =3D=
{
.chained =3D true,
.chain_id =3D ALC269_FIXUP_QUANTA_MUTE
},
+ [ALC269_FIXUP_LIFEBOOK_EXTMIC] =3D {
+ .type =3D HDA_FIXUP_PINS,
+ .v.pins =3D (const struct hda_pintbl[]) {
+ { 0x19, 0x01a1903c }, /* headset mic, with jack detect */
+ { }
+ },
+ },
[ALC269_FIXUP_AMIC] =3D {
.type =3D HDA_FIXUP_PINS,
.v.pins =3D (const struct hda_pintbl[]) {
@@ -4105,6 +4113,7 @@ static const struct snd_pci_quirk alc269_fixup_tb=
l[] =3D {
SND_PCI_QUIRK(0x104d, 0x9084, "Sony VAIO", ALC275_FIXUP_SONY_HWEQ),
SND_PCI_QUIRK_VENDOR(0x104d, "Sony VAIO", ALC269_FIXUP_SONY_VAIO),
SND_PCI_QUIRK(0x10cf, 0x1475, "Lifebook", ALC269_FIXUP_LIFEBOOK),
+ SND_PCI_QUIRK(0x10cf, 0x1845, "Lifebook U904", ALC269_FIXUP_LIFEBOOK_=
EXTMIC),
SND_PCI_QUIRK(0x17aa, 0x20f2, "Thinkpad SL410/510", ALC269_FIXUP_SKU_=
IGNORE),
SND_PCI_QUIRK(0x17aa, 0x215e, "Thinkpad L512", ALC269_FIXUP_SKU_IGNOR=
E),
SND_PCI_QUIRK(0x17aa, 0x21b8, "Thinkpad Edge 14", ALC269_FIXUP_SKU_IG=
NORE),
--=20
2.0.0

[Jiri Slaby]

From: Josef Bacik <***@fusionio.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1de2cfde93c20a0357ff1dffed901598470facf3 upstream.

During transaction cleanup after an abort we are just removing roots from the
ordered roots list which is incorrect. We have a BUG_ON() to make sure that the
root is still part of the ordered roots list when we put our ordered extent
which we were tripping in this case. So do like we do everywhere else and just
move it to the tail of the ordered roots list and allow the normal cleanup to
take care of stuff. Thanks,

Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/disk-io.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 409dcbd234dc..5bdf8ce5be20 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3809,7 +3809,8 @@ static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info)
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
ordered_root);
- list_del_init(&root->ordered_root);
+ list_move_tail(&root->ordered_root,
+ &fs_info->ordered_roots);

btrfs_destroy_ordered_extents(root);

[Jiri Slaby]

From: Liam Girdwood <***@linux.intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 25b4ab430f8e166c9b63f4db28e7e812d5a59396 upstream.

Reset needs to wait 20ms before other codec IO is performed. This wait
was not being performed. Fix this by making sure the reset register is not
restored with the cache, but use the manual reset method in resume with
the wait.

Signed-off-by: Liam Girdwood <***@linux.intel.com>
Signed-off-by: Jarkko Nikula <***@linux.intel.com>
Signed-off-by: Mark Brown <***@linaro.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/soc/codecs/max98090.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index 8bddf3f20a5e..9ad8f019adcd 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -255,6 +255,7 @@ static struct reg_default max98090_reg[] = {
static bool max98090_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
+ case M98090_REG_SOFTWARE_RESET:
case M98090_REG_DEVICE_STATUS:
case M98090_REG_JACK_STATUS:
case M98090_REG_REVISION_ID:
@@ -2360,6 +2361,8 @@ static int max98090_runtime_resume(struct device *dev)

regcache_cache_only(max98090->regmap, false);

+ max98090_reset(max98090);
+
regcache_sync(max98090->regmap);

return 0;

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bae3f4c53585e9a170da9436e0f06919874bda9a upstream.

Fix runtime PM handling of control messages by adding the required PM
counter operations.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index d9e346cf1eb8..d89871b49f11 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -122,13 +122,23 @@ static void acm_release_minor(struct acm *acm)
static int acm_ctrl_msg(struct acm *acm, int request, int value,
void *buf, int len)
{
- int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
+ int retval;
+
+ retval = usb_autopm_get_interface(acm->control);
+ if (retval)
+ return retval;
+
+ retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
request, USB_RT_ACM, value,
acm->control->altsetting[0].desc.bInterfaceNumber,
buf, len, 5000);
+
dev_dbg(&acm->control->dev,
"%s - rq 0x%02x, val %#x, len %#x, result %d\n",
__func__, request, value, len, retval);
+
+ usb_autopm_put_interface(acm->control);
+
return retval < 0 ? retval : 0;
}

[Jiri Slaby]

From: Filipe David Borba Manana <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e84cc14213e2c81ae5a2da341a9da0d58a1dbfad upstream.

In extent-tree.c:btrfs_write_dirty_block_groups(), if the call to
write_one_cache_group() failed, we would return without putting
the block group first.

Signed-off-by: Filipe David Borba Manana <***@gmail.com>
Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/extent-tree.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b256ddc1cb53..63ee604efa6c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3318,10 +3318,9 @@ again:
last = cache->key.objectid + cache->key.offset;

err = write_one_cache_group(trans, root, path, cache);
+ btrfs_put_block_group(cache);
if (err) /* File system offline */
goto out;
-
- btrfs_put_block_group(cache);
}

while (1) {

[Jiri Slaby]

From: "Wang, Xiaoming" <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 2bd0ae464a6cf7363bbf72c8545e0aa43caa57f0 upstream.

Cancel the optimization of compiler for struct snd_compr_avail
which size will be 0x1c in 32bit kernel while 0x20 in 64bit
kernel under the optimizer. That will make compaction between
32bit and 64bit. So add packed to fix the size of struct
snd_compr_avail to 0x1c for all platform.

Signed-off-by: Zhang Dongxing <***@intel.com>
Signed-off-by: xiaoming wang <***@intel.com>
Acked-by: Vinod Koul <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/uapi/sound/compress_offload.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/sound/compress_offload.h b/include/uapi/sound/compress_offload.h
index 5759810e1c1b..21eed488783f 100644
--- a/include/uapi/sound/compress_offload.h
+++ b/include/uapi/sound/compress_offload.h
@@ -80,7 +80,7 @@ struct snd_compr_tstamp {
struct snd_compr_avail {
__u64 avail;
struct snd_compr_tstamp tstamp;
-};
+} __attribute__((packed));

enum snd_compr_direction {
SND_COMPRESS_PLAYBACK = 0,

[Jiri Slaby]

From: "K. Y. Srinivasan" <***@microsoft.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ae339336dc950b9b05e7ccd3565dd3e8781c06d9 upstream.

The current code posts periodic memory pressure status from a dedicated thread.
Under some conditions, especially when we are releasing a lot of memory into
the guest, we may not send timely pressure reports back to the host. Fix this
issue by reporting pressure in all contexts that can be active in this driver.

Signed-off-by: K. Y. Srinivasan <***@microsoft.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/hv/hv_balloon.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 7e17a5495e02..393fd8a98735 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -19,6 +19,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
+#include <linux/jiffies.h>
#include <linux/mman.h>
#include <linux/delay.h>
#include <linux/init.h>
@@ -459,6 +460,11 @@ static bool do_hot_add;
*/
static uint pressure_report_delay = 45;

+/*
+ * The last time we posted a pressure report to host.
+ */
+static unsigned long last_post_time;
+
module_param(hot_add, bool, (S_IRUGO | S_IWUSR));
MODULE_PARM_DESC(hot_add, "If set attempt memory hot_add");

@@ -542,6 +548,7 @@ struct hv_dynmem_device {

static struct hv_dynmem_device dm_device;

+static void post_status(struct hv_dynmem_device *dm);
#ifdef CONFIG_MEMORY_HOTPLUG

static void hv_bring_pgs_online(unsigned long start_pfn, unsigned long size)
@@ -612,7 +619,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
* have not been "onlined" within the allowed time.
*/
wait_for_completion_timeout(&dm_device.ol_waitevent, 5*HZ);
-
+ post_status(&dm_device);
}

return;
@@ -951,11 +958,17 @@ static void post_status(struct hv_dynmem_device *dm)
{
struct dm_status status;
struct sysinfo val;
+ unsigned long now = jiffies;
+ unsigned long last_post = last_post_time;

if (pressure_report_delay > 0) {
--pressure_report_delay;
return;
}
+
+ if (!time_after(now, (last_post_time + HZ)))
+ return;
+
si_meminfo(&val);
memset(&status, 0, sizeof(struct dm_status));
status.hdr.type = DM_STATUS_REPORT;
@@ -983,6 +996,14 @@ static void post_status(struct hv_dynmem_device *dm)
if (status.hdr.trans_id != atomic_read(&trans_id))
return;

+ /*
+ * If the last post time that we sampled has changed,
+ * we have raced, don't post the status.
+ */
+ if (last_post != last_post_time)
+ return;
+
+ last_post_time = jiffies;
vmbus_sendpacket(dm->dev->channel, &status,
sizeof(struct dm_status),
(unsigned long)NULL,
@@ -1117,7 +1138,7 @@ static void balloon_up(struct work_struct *dummy)

if (ret == -EAGAIN)
msleep(20);
-
+ post_status(&dm_device);
} while (ret == -EAGAIN);

if (ret) {
@@ -1144,8 +1165,10 @@ static void balloon_down(struct hv_dynmem_device *dm,
struct dm_unballoon_response resp;
int i;

- for (i = 0; i < range_count; i++)
+ for (i = 0; i < range_count; i++) {
free_balloon_pages(dm, &range_array[i]);
+ post_status(&dm_device);
+ }

if (req->more_pages == 1)
return;

[Jiri Slaby]

From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 94908a39ce971f25c3695c334d88eec4d2837428 upstream.

Channel map positions FLH, FCH, FRH duplicate positions TFL, TFC, TFR.
Both are the speakers above the front speakers (CEA uses "high" and USB
audio uses "top" nomenclature).

Since the USB audio code has used the TFx positions since v3.8
(04324ccc75f96, "ALSA: usb-audio: add channel map support") but the HDMI
code only just started using FxH in a5b7d510b2220cccb ("ALSA: hda -
hdmi: Fix channel maps with less common speakers") which is not yet in
any released kernel, standardize on TFx instead.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 2949c8d34d33..9d1a53f2a510 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -743,12 +743,12 @@ static struct channel_map_table map_tables[] = {
{ SNDRV_CHMAP_RC, RC },
{ SNDRV_CHMAP_FLC, FLC },
{ SNDRV_CHMAP_FRC, FRC },
- { SNDRV_CHMAP_FLH, FLH },
- { SNDRV_CHMAP_FRH, FRH },
+ { SNDRV_CHMAP_TFL, FLH },
+ { SNDRV_CHMAP_TFR, FRH },
{ SNDRV_CHMAP_FLW, FLW },
{ SNDRV_CHMAP_FRW, FRW },
{ SNDRV_CHMAP_TC, TC },
- { SNDRV_CHMAP_FCH, FCH },
+ { SNDRV_CHMAP_TFC, FCH },
{} /* terminator */
};

[Jiri Slaby]

From: Filipe David Borba Manana <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 703c88e035242202e3ab48fcbbbe0a7bc62fb7bb upstream.

In inode.c:btrfs_orphan_add() if we failed to insert the orphan
item, we would return without decrementing the orphan count that
we just incremented before attempting the insertion, leaving the
orphan inode count wrong.

In inode.c:btrfs_orphan_del(), we were decrementing the inode
orphan count if the bit BTRFS_INODE_ORPHAN_META_RESERVED was set,
which is logically wrong because it should be decremented if the
bit BTRFS_INODE_HAS_ORPHAN_ITEM was set - after all we increment
the count when we set the bit BTRFS_INODE_HAS_ORPHAN_ITEM elsewhere.

Signed-off-by: Filipe David Borba Manana <***@gmail.com>
Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/inode.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3d03d2e0849c..250ed4ef6b91 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2978,6 +2978,7 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
if (insert >= 1) {
ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode));
if (ret) {
+ atomic_dec(&root->orphan_inodes);
if (reserve) {
clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
&BTRFS_I(inode)->runtime_flags);
@@ -3027,14 +3028,16 @@ static int btrfs_orphan_del(struct btrfs_trans_handle *trans,
release_rsv = 1;
spin_unlock(&root->orphan_lock);

- if (trans && delete_item)
- ret = btrfs_del_orphan_item(trans, root, btrfs_ino(inode));
-
- if (release_rsv) {
- btrfs_orphan_release_metadata(inode);
+ if (delete_item) {
atomic_dec(&root->orphan_inodes);
+ if (trans)
+ ret = btrfs_del_orphan_item(trans, root,
+ btrfs_ino(inode));
}

+ if (release_rsv)
+ btrfs_orphan_release_metadata(inode);
+
return ret;
}

[Jiri Slaby]

From: Benjamin LaHaise <***@kvack.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit f8567a3845ac05bb28f3c1b478ef752762bd39ef upstream.

The aio cleanups and optimizations by kmo that were merged into the 3.10
tree added a regression for userspace event reaping. Specifically, the
reference counts are not decremented if the event is reaped in userspace,
leading to the application being unable to submit further aio requests.
This patch applies to 3.12+. A separate backport is required for 3.10/3.11.
This issue was uncovered as part of CVE-2014-0206.

Signed-off-by: Benjamin LaHaise <***@kvack.org>
Cc: ***@vger.kernel.org
Cc: Kent Overstreet <***@daterainc.com>
Cc: Mateusz Guzik <***@redhat.com>
Cc: Petr Matousek <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/aio.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 829bda2b26d7..e609e15f36b9 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1021,6 +1021,7 @@ void aio_complete(struct kiocb *iocb, long res, long res2)

/* everything turned out well, dispose of the aiocb. */
kiocb_free(iocb);
+ put_reqs_available(ctx, 1);

/*
* We have to order our ring_info tail store above and test
@@ -1103,8 +1104,6 @@ static long aio_read_events_ring(struct kioctx *ctx,
flush_dcache_page(ctx->ring_pages[0]);

pr_debug("%li h%u t%u\n", ret, head, tail);
-
- put_reqs_available(ctx, ret);
out:
mutex_unlock(&ctx->ring_lock);

[Jiri Slaby]

From: Greg Kroah-Hartman <***@linuxfoundation.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 206a81c18401c0cde6e579164f752c4b147324ce upstream.

The lzo decompressor can, if given some really crazy data, possibly
overrun some variable types. Modify the checking logic to properly
detect overruns before they happen.

Reported-by: "Don A. Bailey" <***@securitymouse.com>
Tested-by: "Don A. Bailey" <***@securitymouse.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
lib/lzo/lzo1x_decompress_safe.c | 62 +++++++++++++++++++++++++++--------------
1 file changed, 41 insertions(+), 21 deletions(-)

diff --git a/lib/lzo/lzo1x_decompress_safe.c b/lib/lzo/lzo1x_decompress_safe.c
index 569985d522d5..8563081e8da3 100644
--- a/lib/lzo/lzo1x_decompress_safe.c
+++ b/lib/lzo/lzo1x_decompress_safe.c
@@ -19,11 +19,31 @@
#include <linux/lzo.h>
#include "lzodefs.h"

-#define HAVE_IP(x) ((size_t)(ip_end - ip) >= (size_t)(x))
-#define HAVE_OP(x) ((size_t)(op_end - op) >= (size_t)(x))
-#define NEED_IP(x) if (!HAVE_IP(x)) goto input_overrun
-#define NEED_OP(x) if (!HAVE_OP(x)) goto output_overrun
-#define TEST_LB(m_pos) if ((m_pos) < out) goto lookbehind_overrun
+#define HAVE_IP(t, x) \
+ (((size_t)(ip_end - ip) >= (size_t)(t + x)) && \
+ (((t + x) >= t) && ((t + x) >= x)))
+
+#define HAVE_OP(t, x) \
+ (((size_t)(op_end - op) >= (size_t)(t + x)) && \
+ (((t + x) >= t) && ((t + x) >= x)))
+
+#define NEED_IP(t, x) \
+ do { \
+ if (!HAVE_IP(t, x)) \
+ goto input_overrun; \
+ } while (0)
+
+#define NEED_OP(t, x) \
+ do { \
+ if (!HAVE_OP(t, x)) \
+ goto output_overrun; \
+ } while (0)
+
+#define TEST_LB(m_pos) \
+ do { \
+ if ((m_pos) < out) \
+ goto lookbehind_overrun; \
+ } while (0)

int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
unsigned char *out, size_t *out_len)
@@ -58,14 +78,14 @@ int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
while (unlikely(*ip == 0)) {
t += 255;
ip++;
- NEED_IP(1);
+ NEED_IP(1, 0);
}
t += 15 + *ip++;
}
t += 3;
copy_literal_run:
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
- if (likely(HAVE_IP(t + 15) && HAVE_OP(t + 15))) {
+ if (likely(HAVE_IP(t, 15) && HAVE_OP(t, 15))) {
const unsigned char *ie = ip + t;
unsigned char *oe = op + t;
do {
@@ -81,8 +101,8 @@ copy_literal_run:
} else
#endif
{
- NEED_OP(t);
- NEED_IP(t + 3);
+ NEED_OP(t, 0);
+ NEED_IP(t, 3);
do {
*op++ = *ip++;
} while (--t > 0);
@@ -95,7 +115,7 @@ copy_literal_run:
m_pos -= t >> 2;
m_pos -= *ip++ << 2;
TEST_LB(m_pos);
- NEED_OP(2);
+ NEED_OP(2, 0);
op[0] = m_pos[0];
op[1] = m_pos[1];
op += 2;
@@ -119,10 +139,10 @@ copy_literal_run:
while (unlikely(*ip == 0)) {
t += 255;
ip++;
- NEED_IP(1);
+ NEED_IP(1, 0);
}
t += 31 + *ip++;
- NEED_IP(2);
+ NEED_IP(2, 0);
}
m_pos = op - 1;
next = get_unaligned_le16(ip);
@@ -137,10 +157,10 @@ copy_literal_run:
while (unlikely(*ip == 0)) {
t += 255;
ip++;
- NEED_IP(1);
+ NEED_IP(1, 0);
}
t += 7 + *ip++;
- NEED_IP(2);
+ NEED_IP(2, 0);
}
next = get_unaligned_le16(ip);
ip += 2;
@@ -154,7 +174,7 @@ copy_literal_run:
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
if (op - m_pos >= 8) {
unsigned char *oe = op + t;
- if (likely(HAVE_OP(t + 15))) {
+ if (likely(HAVE_OP(t, 15))) {
do {
COPY8(op, m_pos);
op += 8;
@@ -164,7 +184,7 @@ copy_literal_run:
m_pos += 8;
} while (op < oe);
op = oe;
- if (HAVE_IP(6)) {
+ if (HAVE_IP(6, 0)) {
state = next;
COPY4(op, ip);
op += next;
@@ -172,7 +192,7 @@ copy_literal_run:
continue;
}
} else {
- NEED_OP(t);
+ NEED_OP(t, 0);
do {
*op++ = *m_pos++;
} while (op < oe);
@@ -181,7 +201,7 @@ copy_literal_run:
#endif
{
unsigned char *oe = op + t;
- NEED_OP(t);
+ NEED_OP(t, 0);
op[0] = m_pos[0];
op[1] = m_pos[1];
op += 2;
@@ -194,15 +214,15 @@ match_next:
state = next;
t = next;
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
- if (likely(HAVE_IP(6) && HAVE_OP(4))) {
+ if (likely(HAVE_IP(6, 0) && HAVE_OP(4, 0))) {
COPY4(op, ip);
op += t;
ip += t;
} else
#endif
{
- NEED_IP(t + 3);
- NEED_OP(t);
+ NEED_IP(t, 3);
+ NEED_OP(t, 0);
while (t > 0) {
*op++ = *ip++;
t--;

[Jiri Slaby]

From: Anton Blanchard <***@samba.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 7505258c5fcb0a1cc3c76a47b4cf9506d21d10e6 upstream.

I noticed KVM is broken when KVM in-kernel XICS emulation
(CONFIG_KVM_XICS) is disabled.

The problem was introduced in 48eaef05 (KVM: PPC: Book3S HV: use
xics_wake_cpu only when defined). It used CONFIG_KVM_XICS to wrap
xics_wake_cpu, where CONFIG_PPC_ICP_NATIVE should have been
used.

Signed-off-by: Anton Blanchard <***@samba.org>
Cc: ***@vger.kernel.org
Signed-off-by: Paul Mackerras <***@samba.org>
Acked-by: Scott Wood <***@freescale.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/powerpc/kvm/book3s_hv.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index e1ab62e0d548..211974a386d6 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -82,7 +82,7 @@ void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)

/* CPU points to the first thread of the core */
if (cpu != me && cpu >= 0 && cpu < nr_cpu_ids) {
-#ifdef CONFIG_KVM_XICS
+#ifdef CONFIG_PPC_ICP_NATIVE
int real_cpu = cpu + vcpu->arch.ptid;
if (paca[real_cpu].kvm_hstate.xics_phys)
xics_wake_cpu(real_cpu);
@@ -1092,9 +1092,7 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
smp_wmb();
#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
if (vcpu->arch.ptid) {
-#ifdef CONFIG_KVM_XICS
xics_wake_cpu(cpu);
-#endif
++vc->n_woken;
}
#endif

[Jiri Slaby]

From: James Hogan <***@imgtec.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 6979f8d28049879e6147767d93ba6732c8bd94f4 upstream.

Commit c49436b657d0 (serial: 8250_dw: Improve unwritable LCR workaround)
caused a regression. It added a check that the LCR was written properly
to detect and workaround the busy quirk, but the behaviour of bit 5
(UART_LCR_SPAR) differs between IP versions 3.00a and 3.14c per the
docs. On older versions this caused the check to fail and it would
repeatedly force idle and rewrite the LCR register, causing delays and
preventing any input from serial being received.

This is fixed by masking out UART_LCR_SPAR before making the comparison.

Signed-off-by: James Hogan <***@imgtec.com>
Cc: Greg Kroah-Hartman <***@linuxfoundation.org>
Cc: Jiri Slaby <***@suse.cz>
Cc: Tim Kryger <***@linaro.org>
Cc: Ezequiel Garcia <***@free-electrons.com>
Cc: Matt Porter <***@linaro.org>
Cc: Markus Mayer <***@linaro.org>
Tested-by: Tim Kryger <***@linaro.org>
Tested-by: Ezequiel Garcia <***@free-electrons.com>
Tested-by: Heikki Krogerus <***@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/tty/serial/8250/8250_dw.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 1dec9af3c9ab..70ecf541b77a 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -95,7 +95,8 @@ static void dw8250_serial_out(struct uart_port *p, int offset, int value)
if (offset == UART_LCR) {
int tries = 1000;
while (tries--) {
- if (value == p->serial_in(p, UART_LCR))
+ unsigned int lcr = p->serial_in(p, UART_LCR);
+ if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
return;
dw8250_force_idle(p);
writeb(value, p->membase + (UART_LCR << p->regshift));
@@ -131,7 +132,8 @@ static void dw8250_serial_out32(struct uart_port *p, int offset, int value)
if (offset == UART_LCR) {
int tries = 1000;
while (tries--) {
- if (value == p->serial_in(p, UART_LCR))
+ unsigned int lcr = p->serial_in(p, UART_LCR);
+ if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
return;
dw8250_force_idle(p);
writel(value, p->membase + (UART_LCR << p->regshift));

[Jiri Slaby]

From: Paolo Bonzini <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fc57ac2c9ca8109ea97fcc594f4be436944230cc upstream.

When Hyper-V enlightenments are in effect, Windows prefers to issue an
Hyper-V MSR write to issue an EOI rather than an x2apic MSR write.
The Hyper-V MSR write is not handled by the processor, and besides
being slower, this also causes bugs with APIC virtualization. The
reason is that on EOI the processor will modify the highest in-service
interrupt (SVI) field of the VMCS, as explained in section 29.1.4 of
the SDM; every other step in EOI virtualization is already done by
apic_send_eoi or on VM entry, but this one is missing.

We need to do the same, and be careful not to muck with the isr_count
and highest_isr_cache fields that are unused when virtual interrupt
delivery is enabled.

Reviewed-by: Yang Zhang <***@intel.com>
Signed-off-by: Paolo Bonzini <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/x86/kvm/lapic.c | 62 ++++++++++++++++++++++++++++++++++++----------------
1 file changed, 43 insertions(+), 19 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index d86ff15fc89f..92bbb397f59d 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -360,6 +360,8 @@ static inline void apic_clear_irr(int vec, struct kvm_lapic *apic)

static inline void apic_set_isr(int vec, struct kvm_lapic *apic)
{
+ /* Note that we never get here with APIC virtualization enabled. */
+
if (!__apic_test_and_set_vector(vec, apic->regs + APIC_ISR))
++apic->isr_count;
BUG_ON(apic->isr_count > MAX_APIC_VECTOR);
@@ -371,12 +373,48 @@ static inline void apic_set_isr(int vec, struct kvm_lapic *apic)
apic->highest_isr_cache = vec;
}

+static inline int apic_find_highest_isr(struct kvm_lapic *apic)
+{
+ int result;
+
+ /*
+ * Note that isr_count is always 1, and highest_isr_cache
+ * is always -1, with APIC virtualization enabled.
+ */
+ if (!apic->isr_count)
+ return -1;
+ if (likely(apic->highest_isr_cache != -1))
+ return apic->highest_isr_cache;
+
+ result = find_highest_vector(apic->regs + APIC_ISR);
+ ASSERT(result == -1 || result >= 16);
+
+ return result;
+}
+
static inline void apic_clear_isr(int vec, struct kvm_lapic *apic)
{
- if (__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR))
+ struct kvm_vcpu *vcpu;
+ if (!__apic_test_and_clear_vector(vec, apic->regs + APIC_ISR))
+ return;
+
+ vcpu = apic->vcpu;
+
+ /*
+ * We do get here for APIC virtualization enabled if the guest
+ * uses the Hyper-V APIC enlightenment. In this case we may need
+ * to trigger a new interrupt delivery by writing the SVI field;
+ * on the other hand isr_count and highest_isr_cache are unused
+ * and must be left alone.
+ */
+ if (unlikely(kvm_apic_vid_enabled(vcpu->kvm)))
+ kvm_x86_ops->hwapic_isr_update(vcpu->kvm,
+ apic_find_highest_isr(apic));
+ else {
--apic->isr_count;
- BUG_ON(apic->isr_count < 0);
- apic->highest_isr_cache = -1;
+ BUG_ON(apic->isr_count < 0);
+ apic->highest_isr_cache = -1;
+ }
}

int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu)
@@ -456,22 +494,6 @@ static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu)
__clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention);
}

-static inline int apic_find_highest_isr(struct kvm_lapic *apic)
-{
- int result;
-
- /* Note that isr_count is always 1 with vid enabled */
- if (!apic->isr_count)
- return -1;
- if (likely(apic->highest_isr_cache != -1))
- return apic->highest_isr_cache;
-
- result = find_highest_vector(apic->regs + APIC_ISR);
- ASSERT(result == -1 || result >= 16);
-
- return result;
-}
-
void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr)
{
struct kvm_lapic *apic = vcpu->arch.apic;
@@ -1605,6 +1627,8 @@ int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu)
int vector = kvm_apic_has_interrupt(vcpu);
struct kvm_lapic *apic = vcpu->arch.apic;

+ /* Note that we never get here with APIC virtualization enabled. */
+
if (vector == -1)
return -1;

[Jiri Slaby]

From: Steve French <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 3c5f9be108783c05cade918d29c8711b236acb1d upstream.

ClientGUID must be zero for SMB2.02 dialect. See section 2.2.3
of MS-SMB2. For SMB2.1 and later it must be non-zero.

Signed-off-by: Steve French <***@gmail.com>
CC: Sachin Prabhu <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/cifs/smb2pdu.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 37de258d9a34..5818d2ca66f1 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -375,7 +375,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)

req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);

- memcpy(req->ClientGUID, server->client_guid, SMB2_CLIENT_GUID_SIZE);
+ /* ClientGUID must be zero for SMB2.02 dialect */
+ if (ses->server->vals->protocol_id == SMB20_PROT_ID)
+ memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
+ else
+ memcpy(req->ClientGUID, server->client_guid,
+ SMB2_CLIENT_GUID_SIZE);

iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */

[Jiri Slaby]

From: Steve French <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ff1c038addc4f205d5f1ede449426c7d316c0eed upstream.

When we are running SMB3 or SMB3.02 connections which are signed
we need to validate the protocol negotiation information,
to ensure that the negotiate protocol response was not tampered with.

Add the missing FSCTL which is sent at mount time (immediately after
the SMB3 Tree Connect) to validate that the capabilities match
what we think the server sent.

"Secure dialect negotiation is introduced in SMB3 to protect against
man-in-the-middle attempt to downgrade dialect negotiation.
The idea is to prevent an eavesdropper from downgrading the initially
negotiated dialect and capabilities between the client and the server."

For more explanation see 2.2.31.4 of MS-SMB2 or
http://blogs.msdn.com/b/openspecification/archive/2012/06/28/smb3-secure-dialect-negotiation.aspx

Reviewed-by: Pavel Shilovsky <***@etersoft.ru>
Signed-off-by: Steve French <***@gmail.com>
[***@suse.de: backported atop kernel without clone_range support]
Signed-off-by: David Disseldorp <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/cifs/cifsglob.h | 1 +
fs/cifs/smb2ops.c | 1 +
fs/cifs/smb2pdu.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/cifs/smb2pdu.h | 12 ++++++---
fs/cifs/smb2proto.h | 1 +
fs/cifs/smbfsctl.h | 2 +-
6 files changed, 90 insertions(+), 4 deletions(-)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 2f6f1ac52d3f..b6e1b2f36b69 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -391,6 +391,7 @@ struct smb_version_operations {
const char *, u32 *);
int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
int);
+ int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
};

struct smb_version_values {
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 13e505191364..4ac88f89a5e5 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1059,6 +1059,7 @@ struct smb_version_operations smb30_operations = {
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
.parse_lease_buf = smb3_parse_lease_buf,
+ .validate_negotiate = smb3_validate_negotiate,
};

struct smb_version_values smb20_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 06d29e3f5d10..c54d7eb39b41 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -456,6 +456,81 @@ neg_exit:
return rc;
}

+int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
+{
+ int rc = 0;
+ struct validate_negotiate_info_req vneg_inbuf;
+ struct validate_negotiate_info_rsp *pneg_rsp;
+ u32 rsplen;
+
+ cifs_dbg(FYI, "validate negotiate\n");
+
+ /*
+ * validation ioctl must be signed, so no point sending this if we
+ * can not sign it. We could eventually change this to selectively
+ * sign just this, the first and only signed request on a connection.
+ * This is good enough for now since a user who wants better security
+ * would also enable signing on the mount. Having validation of
+ * negotiate info for signed connections helps reduce attack vectors
+ */
+ if (tcon->ses->server->sign == false)
+ return 0; /* validation requires signing */
+
+ vneg_inbuf.Capabilities =
+ cpu_to_le32(tcon->ses->server->vals->req_capabilities);
+ memcpy(vneg_inbuf.Guid, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
+
+ if (tcon->ses->sign)
+ vneg_inbuf.SecurityMode =
+ cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
+ else if (global_secflags & CIFSSEC_MAY_SIGN)
+ vneg_inbuf.SecurityMode =
+ cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
+ else
+ vneg_inbuf.SecurityMode = 0;
+
+ vneg_inbuf.DialectCount = cpu_to_le16(1);
+ vneg_inbuf.Dialects[0] =
+ cpu_to_le16(tcon->ses->server->vals->protocol_id);
+
+ rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
+ FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
+ (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
+ (char **)&pneg_rsp, &rsplen);
+
+ if (rc != 0) {
+ cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
+ return -EIO;
+ }
+
+ if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
+ cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
+ return -EIO;
+ }
+
+ /* check validate negotiate info response matches what we got earlier */
+ if (pneg_rsp->Dialect !=
+ cpu_to_le16(tcon->ses->server->vals->protocol_id))
+ goto vneg_out;
+
+ if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
+ goto vneg_out;
+
+ /* do not validate server guid because not saved at negprot time yet */
+
+ if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
+ SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
+ goto vneg_out;
+
+ /* validate negotiate successful */
+ cifs_dbg(FYI, "validate negotiate info successful\n");
+ return 0;
+
+vneg_out:
+ cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
+ return -EIO;
+}
+
int
SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
const struct nls_table *nls_cp)
@@ -821,6 +896,8 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");

+ if (tcon->ses->server->ops->validate_negotiate)
+ rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
tcon_exit:
free_rsp_buf(resp_buftype, rsp);
kfree(unc_path);
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index b83d0118a757..870f97303ef3 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -546,13 +546,19 @@ struct copychunk_ioctl {
__u32 Reserved2;
} __packed;

-/* Response and Request are the same format */
-struct validate_negotiate_info {
+struct validate_negotiate_info_req {
__le32 Capabilities;
__u8 Guid[SMB2_CLIENT_GUID_SIZE];
__le16 SecurityMode;
__le16 DialectCount;
- __le16 Dialect[1];
+ __le16 Dialects[1]; /* dialect (someday maybe list) client asked for */
+} __packed;
+
+struct validate_negotiate_info_rsp {
+ __le32 Capabilities;
+ __u8 Guid[SMB2_CLIENT_GUID_SIZE];
+ __le16 SecurityMode;
+ __le16 Dialect; /* Dialect in use for the connection */
} __packed;

#define RSS_CAPABLE 0x00000001
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 7db5db0eef18..d18b19ec1145 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -158,5 +158,6 @@ extern int smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
struct smb2_lock_element *buf);
extern int SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
__u8 *lease_key, const __le32 lease_state);
+extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *);

#endif /* _SMB2PROTO_H */
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index a4b2391fe66e..0e538b5c9622 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -90,7 +90,7 @@
#define FSCTL_LMR_REQUEST_RESILIENCY 0x001401D4 /* BB add struct */
#define FSCTL_LMR_GET_LINK_TRACK_INF 0x001400E8 /* BB add struct */
#define FSCTL_LMR_SET_LINK_TRACK_INF 0x001400EC /* BB add struct */
-#define FSCTL_VALIDATE_NEGOTIATE_INFO 0x00140204 /* BB add struct */
+#define FSCTL_VALIDATE_NEGOTIATE_INFO 0x00140204
/* Perform server-side data movement */
#define FSCTL_SRV_COPYCHUNK 0x001440F2
#define FSCTL_SRV_COPYCHUNK_WRITE 0x001480F2

[Jiri Slaby]

From: Josef Bacik <***@fusionio.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 724e2315db3d59a8201d4a87c7c7a873e60e1ce0 upstream.

I was noticing the slab redzone stuff going off every once and a while during
transaction aborts. This was caused by two things

1) We would walk the pending snapshots and set their error to -ECANCELED. We
don't need to do this, the snapshot stuff waits for a transaction commit and if
there is a problem we just free our pending snapshot object and exit. Doing
this was causing us to touch the pending snapshot object after the thing had
already been freed.

2) We were freeing the transaction manually with wanton disregard for it's
use_count reference counter. To fix this I cleaned up the transaction freeing
loop to either wait for the transaction commit to finish if it was in the middle
of that (since it will be cleaned and freed up there) or to do the cleanup
oursevles.

I also moved the global "kill all things dirty everywhere" stuff outside of the
transaction cleanup loop since that only needs to be done once. With this patch
I'm no longer seeing slab corruption because of use after frees. Thanks,

Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/disk-io.c | 111 ++++++++++++++++++-------------------------------
fs/btrfs/transaction.c | 22 +++++-----
fs/btrfs/transaction.h | 1 +
3 files changed, 52 insertions(+), 82 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 5bdf8ce5be20..9f1d680558bb 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -64,7 +64,6 @@ static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t,
static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_root *root);
-static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t);
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages,
@@ -3888,24 +3887,6 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
return ret;
}

-static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t)
-{
- struct btrfs_pending_snapshot *snapshot;
- struct list_head splice;
-
- INIT_LIST_HEAD(&splice);
-
- list_splice_init(&t->pending_snapshots, &splice);
-
- while (!list_empty(&splice)) {
- snapshot = list_entry(splice.next,
- struct btrfs_pending_snapshot,
- list);
- snapshot->error = -ECANCELED;
- list_del_init(&snapshot->list);
- }
-}
-
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
{
struct btrfs_inode *btrfs_inode;
@@ -4035,6 +4016,8 @@ again:
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_root *root)
{
+ btrfs_destroy_ordered_operations(cur_trans, root);
+
btrfs_destroy_delayed_refs(cur_trans, root);
btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,
cur_trans->dirty_pages.dirty_bytes);
@@ -4042,8 +4025,6 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
cur_trans->state = TRANS_STATE_COMMIT_START;
wake_up(&root->fs_info->transaction_blocked_wait);

- btrfs_evict_pending_snapshots(cur_trans);
-
cur_trans->state = TRANS_STATE_UNBLOCKED;
wake_up(&root->fs_info->transaction_wait);

@@ -4067,63 +4048,51 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
static int btrfs_cleanup_transaction(struct btrfs_root *root)
{
struct btrfs_transaction *t;
- LIST_HEAD(list);

mutex_lock(&root->fs_info->transaction_kthread_mutex);

spin_lock(&root->fs_info->trans_lock);
- list_splice_init(&root->fs_info->trans_list, &list);
- root->fs_info->running_transaction = NULL;
- spin_unlock(&root->fs_info->trans_lock);
-
- while (!list_empty(&list)) {
- t = list_entry(list.next, struct btrfs_transaction, list);
-
- btrfs_destroy_ordered_operations(t, root);
-
- btrfs_destroy_all_ordered_extents(root->fs_info);
-
- btrfs_destroy_delayed_refs(t, root);
-
- /*
- * FIXME: cleanup wait for commit
- * We needn't acquire the lock here, because we are during
- * the umount, there is no other task which will change it.
- */
- t->state = TRANS_STATE_COMMIT_START;
- smp_mb();
- if (waitqueue_active(&root->fs_info->transaction_blocked_wait))
- wake_up(&root->fs_info->transaction_blocked_wait);
-
- btrfs_evict_pending_snapshots(t);
-
- t->state = TRANS_STATE_UNBLOCKED;
- smp_mb();
- if (waitqueue_active(&root->fs_info->transaction_wait))
- wake_up(&root->fs_info->transaction_wait);
-
- btrfs_destroy_delayed_inodes(root);
- btrfs_assert_delayed_root_empty(root);
-
- btrfs_destroy_all_delalloc_inodes(root->fs_info);
-
- btrfs_destroy_marked_extents(root, &t->dirty_pages,
- EXTENT_DIRTY);
-
- btrfs_destroy_pinned_extent(root,
- root->fs_info->pinned_extents);
-
- t->state = TRANS_STATE_COMPLETED;
- smp_mb();
- if (waitqueue_active(&t->commit_wait))
- wake_up(&t->commit_wait);
+ while (!list_empty(&root->fs_info->trans_list)) {
+ t = list_first_entry(&root->fs_info->trans_list,
+ struct btrfs_transaction, list);
+ if (t->state >= TRANS_STATE_COMMIT_START) {
+ atomic_inc(&t->use_count);
+ spin_unlock(&root->fs_info->trans_lock);
+ btrfs_wait_for_commit(root, t->transid);
+ btrfs_put_transaction(t);
+ spin_lock(&root->fs_info->trans_lock);
+ continue;
+ }
+ if (t == root->fs_info->running_transaction) {
+ t->state = TRANS_STATE_COMMIT_DOING;
+ spin_unlock(&root->fs_info->trans_lock);
+ /*
+ * We wait for 0 num_writers since we don't hold a trans
+ * handle open currently for this transaction.
+ */
+ wait_event(t->writer_wait,
+ atomic_read(&t->num_writers) == 0);
+ } else {
+ spin_unlock(&root->fs_info->trans_lock);
+ }
+ btrfs_cleanup_one_transaction(t, root);

- atomic_set(&t->use_count, 0);
+ spin_lock(&root->fs_info->trans_lock);
+ if (t == root->fs_info->running_transaction)
+ root->fs_info->running_transaction = NULL;
list_del_init(&t->list);
- memset(t, 0, sizeof(*t));
- kmem_cache_free(btrfs_transaction_cachep, t);
- }
+ spin_unlock(&root->fs_info->trans_lock);

+ btrfs_put_transaction(t);
+ trace_btrfs_transaction_commit(root);
+ spin_lock(&root->fs_info->trans_lock);
+ }
+ spin_unlock(&root->fs_info->trans_lock);
+ btrfs_destroy_all_ordered_extents(root->fs_info);
+ btrfs_destroy_delayed_inodes(root);
+ btrfs_assert_delayed_root_empty(root);
+ btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents);
+ btrfs_destroy_all_delalloc_inodes(root->fs_info);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);

return 0;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index f98b976ce2b5..3b2acdeb659c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -57,7 +57,7 @@ static unsigned int btrfs_blocked_trans_types[TRANS_STATE_MAX] = {
__TRANS_JOIN_NOLOCK),
};

-static void put_transaction(struct btrfs_transaction *transaction)
+void btrfs_put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(atomic_read(&transaction->use_count) == 0);
if (atomic_dec_and_test(&transaction->use_count)) {
@@ -332,7 +332,7 @@ static void wait_current_trans(struct btrfs_root *root)
wait_event(root->fs_info->transaction_wait,
cur_trans->state >= TRANS_STATE_UNBLOCKED ||
cur_trans->aborted);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
@@ -610,7 +610,7 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)
}

wait_for_commit(root, cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
out:
return ret;
}
@@ -729,7 +729,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
smp_mb();
if (waitqueue_active(&cur_trans->writer_wait))
wake_up(&cur_trans->writer_wait);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);

if (current->journal_info == trans)
current->journal_info = NULL;
@@ -1506,7 +1506,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
if (current->journal_info == trans)
current->journal_info = NULL;

- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
return 0;
}

@@ -1550,8 +1550,8 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans,

if (trans->type & __TRANS_FREEZABLE)
sb_end_intwrite(root->fs_info->sb);
- put_transaction(cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);

trace_btrfs_transaction_commit(root);

@@ -1667,7 +1667,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,

wait_for_commit(root, cur_trans);

- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);

return ret;
}
@@ -1684,7 +1684,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,

wait_for_commit(root, prev_trans);

- put_transaction(prev_trans);
+ btrfs_put_transaction(prev_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
@@ -1883,8 +1883,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
list_del_init(&cur_trans->list);
spin_unlock(&root->fs_info->trans_lock);

- put_transaction(cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);

if (trans->type & __TRANS_FREEZABLE)
sb_end_intwrite(root->fs_info->sb);
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 5c2af8491621..306f88ae1de3 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -166,4 +166,5 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages, int mark);
int btrfs_transaction_blocked(struct btrfs_fs_info *info);
int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
+void btrfs_put_transaction(struct btrfs_transaction *transaction);
#endif

[Jiri Slaby]

From: Filipe David Borba Manana <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 9b1998598625fb5b798e8291cafda1a8ec17c1bd upstream.

Currently the fs sync function (super.c:btrfs_sync_fs()) doesn't
wait for delayed work to finish before returning success to the
caller. This change fixes this, ensuring that there's no data loss
if a power failure happens right after fs sync returns success to
the caller and before the next commit happens.

Steps to reproduce the data loss issue:

$ mkfs.btrfs -f /dev/sdb3
$ mount /dev/sdb3 /mnt/btrfs
$ perl -e '$d = ("\x41" x 6001); open($f,">","/mnt/btrfs/foobar"); print $f $d; close($f);' && btrfs fi sync /mnt/btrfs

Right after the btrfs fi sync command (a second or 2 for example), power
off the machine and reboot it. The file will be empty, as it can be verified
after mounting the filesystem and through btrfs-debug-tree:

$ btrfs-debug-tree /dev/sdb3 | egrep '\(257 INODE_ITEM 0\) itemoff' -B 3 -A 8
item 3 key (256 DIR_INDEX 2) itemoff 3751 itemsize 36
location key (257 INODE_ITEM 0) type FILE
namelen 6 datalen 0 name: foobar
item 4 key (257 INODE_ITEM 0) itemoff 3591 itemsize 160
inode generation 7 transid 7 size 0 block group 0 mode 100644 links 1
item 5 key (257 INODE_REF 256) itemoff 3575 itemsize 16
inode ref index 2 namelen 6 name: foobar
checksum tree key (CSUM_TREE ROOT_ITEM 0)
leaf 29429760 items 0 free space 3995 generation 7 owner 7
fs uuid 6192815c-af2a-4b75-b3db-a959ffb6166e
chunk uuid b529c44b-938c-4d3d-910a-013b4700bcae
uuid tree key (UUID_TREE ROOT_ITEM 0)

After this patch, the data loss no longer happens after a power failure and
btrfs-debug-tree shows:

$ btrfs-debug-tree /dev/sdb3 | egrep '\(257 INODE_ITEM 0\) itemoff' -B 3 -A 8
item 3 key (256 DIR_INDEX 2) itemoff 3751 itemsize 36
location key (257 INODE_ITEM 0) type FILE
namelen 6 datalen 0 name: foobar
item 4 key (257 INODE_ITEM 0) itemoff 3591 itemsize 160
inode generation 6 transid 6 size 6001 block group 0 mode 100644 links 1
item 5 key (257 INODE_REF 256) itemoff 3575 itemsize 16
inode ref index 2 namelen 6 name: foobar
item 6 key (257 EXTENT_DATA 0) itemoff 3522 itemsize 53
extent data disk byte 12845056 nr 8192
extent data offset 0 nr 8192 ram 8192
extent compression 0
checksum tree key (CSUM_TREE ROOT_ITEM 0)

Signed-off-by: Filipe David Borba Manana <***@gmail.com>
Reviewed-by: Miao Xie <***@cn.fujitsu.com>
Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/ioctl.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 45301541349e..ad6a08c5801e 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4564,9 +4564,15 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_logical_to_ino(root, argp);
case BTRFS_IOC_SPACE_INFO:
return btrfs_ioctl_space_info(root, argp);
- case BTRFS_IOC_SYNC:
- btrfs_sync_fs(file->f_dentry->d_sb, 1);
- return 0;
+ case BTRFS_IOC_SYNC: {
+ int ret;
+
+ ret = btrfs_start_all_delalloc_inodes(root->fs_info, 0);
+ if (ret)
+ return ret;
+ ret = btrfs_sync_fs(file->f_dentry->d_sb, 1);
+ return ret;
+ }
case BTRFS_IOC_START_SYNC:
return btrfs_ioctl_start_sync(root, argp);
case BTRFS_IOC_WAIT_SYNC:

[Jiri Slaby]

From: Benjamin LaHaise <***@kvack.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit edfbbf388f293d70bf4b7c0bc38774d05e6f711a upstream.

A kernel memory disclosure was introduced in aio_read_events_ring() in v3.10
by commit a31ad380bed817aa25f8830ad23e1a0480fef797. The changes made to
aio_read_events_ring() failed to correctly limit the index into
ctx->ring_pages[], allowing an attacked to cause the subsequent kmap() of
an arbitrary page with a copy_to_user() to copy the contents into userspace.
This vulnerability has been assigned CVE-2014-0206. Thanks to Mateusz and
Petr for disclosing this issue.

This patch applies to v3.12+. A separate backport is needed for 3.10/3.11.

Signed-off-by: Benjamin LaHaise <***@kvack.org>
Cc: Mateusz Guzik <***@redhat.com>
Cc: Petr Matousek <***@redhat.com>
Cc: Kent Overstreet <***@daterainc.com>
Cc: Jeff Moyer <***@redhat.com>
Cc: ***@vger.kernel.org
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/aio.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/aio.c b/fs/aio.c
index a0ed6c7d2cd2..829bda2b26d7 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1062,6 +1062,9 @@ static long aio_read_events_ring(struct kioctx *ctx,
if (head == tail)
goto out;

+ head %= ctx->nr_events;
+ tail %= ctx->nr_events;
+
while (ret < nr) {
long avail;
struct io_event *ev;

[Jiri Slaby]

From: Guenter Roeck <***@roeck-us.net>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 8a8320c2e78d1b619a8fa8eb5ae946b8691de604 upstream.

Fix:

sm501 sm501: SM501 At b3e00000: Version 050100a0, 8 Mb, IRQ 100
Attribute dbg_regs: write permission without 'store'
------------[ cut here ]------------
WARNING: at drivers/base/core.c:620

dbg_regs does not have a write function and must therefore be marked
as read-only.

Signed-off-by: Guenter Roeck <***@roeck-us.net>
Signed-off-by: Lee Jones <***@linaro.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/mfd/sm501.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 33f040c558d0..3799a3d64415 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1232,7 +1232,7 @@ static ssize_t sm501_dbg_regs(struct device *dev,
}


-static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
+static DEVICE_ATTR(dbg_regs, 0444, sm501_dbg_regs, NULL);

/* sm501_init_reg
*

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 5a345c20c17d87099224a4be12e69e5bd7023dca upstream.

Fix race between write() and suspend() which could lead to writes being
dropped (or I/O while suspended) if the device is runtime suspended
while a write request is being processed.

Specifically, suspend() releases the write_lock after determining the
device is idle but before incrementing the susp_count, thus leaving a
window where a concurrent write() can submit an urb.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 0b5e381bcbe6..8bde4781d347 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1420,18 +1420,15 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
struct acm *acm = usb_get_intfdata(intf);
int cnt;

+ spin_lock_irq(&acm->read_lock);
+ spin_lock(&acm->write_lock);
if (PMSG_IS_AUTO(message)) {
- int b;
-
- spin_lock_irq(&acm->write_lock);
- b = acm->transmitting;
- spin_unlock_irq(&acm->write_lock);
- if (b)
+ if (acm->transmitting) {
+ spin_unlock(&acm->write_lock);
+ spin_unlock_irq(&acm->read_lock);
return -EBUSY;
+ }
}
-
- spin_lock_irq(&acm->read_lock);
- spin_lock(&acm->write_lock);
cnt = acm->susp_count++;
spin_unlock(&acm->write_lock);
spin_unlock_irq(&acm->read_lock);

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e144ed28bed10684f9aaec6325ed974d53f76110 upstream.

Fix race between write() and resume() due to improper locking that could
lead to writes being reordered.

Resume must be done atomically and susp_count be protected by the
write_lock in order to prevent racing with write(). This could otherwise
lead to writes being reordered if write() grabs the write_lock after
susp_count is decremented, but before the delayed urb is submitted.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 23 +++++++++--------------
1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 8bde4781d347..19263a3f3d0d 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1447,27 +1447,20 @@ static int acm_resume(struct usb_interface *intf)
struct acm *acm = usb_get_intfdata(intf);
struct acm_wb *wb;
int rv = 0;
- int cnt;

spin_lock_irq(&acm->read_lock);
- acm->susp_count -= 1;
- cnt = acm->susp_count;
- spin_unlock_irq(&acm->read_lock);
+ spin_lock(&acm->write_lock);

- if (cnt)
- return 0;
+ if (--acm->susp_count)
+ goto out;

if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
- rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
+ rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);

- spin_lock_irq(&acm->write_lock);
if (acm->delayed_wb) {
wb = acm->delayed_wb;
acm->delayed_wb = NULL;
- spin_unlock_irq(&acm->write_lock);
acm_start_wb(acm, wb);
- } else {
- spin_unlock_irq(&acm->write_lock);
}

/*
@@ -1475,12 +1468,14 @@ static int acm_resume(struct usb_interface *intf)
* do the write path at all cost
*/
if (rv < 0)
- goto err_out;
+ goto out;

- rv = acm_submit_read_urbs(acm, GFP_NOIO);
+ rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
}
+out:
+ spin_unlock(&acm->write_lock);
+ spin_unlock_irq(&acm->read_lock);

-err_out:
return rv;
}

[Jiri Slaby]

From: Jeff Layton <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a0ef5e19684f0447da9ff0654a12019c484f57ca upstream.

Currently when we are processing a request, we try to scrape an expired
or over-limit entry off the list in preference to allocating a new one
from the slab.

This is unnecessarily complicated. Just use the slab layer.

Signed-off-by: Jeff Layton <***@redhat.com>
Signed-off-by: J. Bruce Fields <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/nfsd/nfscache.c | 36 ++++--------------------------------
1 file changed, 4 insertions(+), 32 deletions(-)

diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index b6af150c96b8..f8f060ffbf4f 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -132,13 +132,6 @@ nfsd_reply_cache_alloc(void)
}

static void
-nfsd_reply_cache_unhash(struct svc_cacherep *rp)
-{
- hlist_del_init(&rp->c_hash);
- list_del_init(&rp->c_lru);
-}
-
-static void
nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
{
if (rp->c_type == RC_REPLBUFF && rp->c_replvec.iov_base) {
@@ -416,22 +409,8 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)

/*
* Since the common case is a cache miss followed by an insert,
- * preallocate an entry. First, try to reuse the first entry on the LRU
- * if it works, then go ahead and prune the LRU list.
+ * preallocate an entry.
*/
- spin_lock(&cache_lock);
- if (!list_empty(&lru_head)) {
- rp = list_first_entry(&lru_head, struct svc_cacherep, c_lru);
- if (nfsd_cache_entry_expired(rp) ||
- num_drc_entries >= max_drc_entries) {
- nfsd_reply_cache_unhash(rp);
- prune_cache_entries();
- goto search_cache;
- }
- }
-
- /* No expired ones available, allocate a new one. */
- spin_unlock(&cache_lock);
rp = nfsd_reply_cache_alloc();
spin_lock(&cache_lock);
if (likely(rp)) {
@@ -439,7 +418,9 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
drc_mem_usage += sizeof(*rp);
}

-search_cache:
+ /* go ahead and prune the cache */
+ prune_cache_entries();
+
found = nfsd_cache_search(rqstp, csum);
if (found) {
if (likely(rp))
@@ -453,15 +434,6 @@ search_cache:
goto out;
}

- /*
- * We're keeping the one we just allocated. Are we now over the
- * limit? Prune one off the tip of the LRU in trade for the one we
- * just allocated if so.
- */
- if (num_drc_entries >= max_drc_entries)
- nfsd_reply_cache_free_locked(list_first_entry(&lru_head,
- struct svc_cacherep, c_lru));
-
nfsdstats.rcmisses++;
rqstp->rq_cacherep = rp;
rp->c_state = RC_INPROG;

[Jiri Slaby]

3.12-stable review patch. If anyone has any objections, please let me know.

===============

This reverts commit 7cbcb219e4113e10ce4b036118992abdbc4a8273,
misapplied upstream commit 5837c80e870bc3b12ac6a98cdc9ce7a9522a8fb6.

The upstream commit was applied twice to stable-3.12, the second time
to bio_integrity_generate. Revert this second application.

Cc: Martin K. Petersen <***@oracle.com>
Cc: Jens Axboe <***@kernel.dk>
Cc: Christoph Hellwig <***@lst.de>
Signed-off-by: Nicholas Bellinger <***@linux-iscsi.org>
Signed-off-by: Jens Axboe <***@kernel.dk>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/bio-integrity.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index b5ee393e2e8d..76273c1d26a6 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -316,7 +316,7 @@ static void bio_integrity_generate(struct bio *bio)
bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
bix.sector_size = bi->sector_size;

- bio_for_each_segment_all(bv, bio, i) {
+ bio_for_each_segment(bv, bio, i) {
void *kaddr = kmap_atomic(bv->bv_page);
bix.data_buf = kaddr + bv->bv_offset;
bix.data_size = bv->bv_len;

[Jiri Slaby]

From: Naoya Horiguchi <n-***@ah.jp.nec.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d4c54919ed86302094c0ca7d48a8cbd4ee753e92 upstream.

The age table walker doesn't check non-present hugetlb entry in common
path, so hugetlb_entry() callbacks must check it. The reason for this
behavior is that some callers want to handle it in its own way.

[ I think that reason is bogus, btw - it should just do what the regular
code does, which is to call the "pte_hole()" function for such hugetlb
entries - Linus]

However, some callers don't check it now, which causes unpredictable
result, for example when we have a race between migrating hugepage and
reading /proc/pid/numa_maps. This patch fixes it by adding !pte_present
checks on buggy callbacks.

This bug exists for years and got visible by introducing hugepage
migration.

ChangeLog v2:
- fix if condition (check !pte_present() instead of pte_present())

Reported-by: Sasha Levin <***@oracle.com>
Signed-off-by: Naoya Horiguchi <n-***@ah.jp.nec.com>
Cc: Rik van Riel <***@redhat.com>
Cc: <***@vger.kernel.org> [3.12+]
Signed-off-by: Andrew Morton <***@linux-foundation.org>
[ Backported to 3.15. Signed-off-by: Josh Boyer <***@fedoraproject.org> ]
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/proc/task_mmu.c | 2 +-
mm/mempolicy.c | 6 +++++-
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 390bdab01c3c..ad4df869c907 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1353,7 +1353,7 @@ static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask,
struct numa_maps *md;
struct page *page;

- if (pte_none(*pte))
+ if (!pte_present(*pte))
return 0;

page = pte_page(*pte);
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 927a69cf354a..a005cc9f6f18 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -525,9 +525,13 @@ static void queue_pages_hugetlb_pmd_range(struct vm_area_struct *vma,
#ifdef CONFIG_HUGETLB_PAGE
int nid;
struct page *page;
+ pte_t entry;

spin_lock(&vma->vm_mm->page_table_lock);
- page = pte_page(huge_ptep_get((pte_t *)pmd));
+ entry = huge_ptep_get((pte_t *)pmd);
+ if (!pte_present(entry))
+ goto unlock;
+ page = pte_page(entry);
nid = page_to_nid(page);
if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT))
goto unlock;

[Jiri Slaby]

From: Josef Bacik <***@fusionio.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4e121c06adf53aae478ebce3035116595d063413 upstream.

If we abort not during a transaction commit we won't clean up anything until we
unmount. Unfortunately if we abort in the middle of writing out an ordered
extent we won't clean it up and if somebody is waiting on that ordered extent
they will wait forever. To fix this just make the transaction kthread call the
cleanup transaction stuff if it notices theres an error, and make
btrfs_end_transaction wake up the transaction kthread if there is an error.
Thanks,

Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/disk-io.c | 3 +++
fs/btrfs/transaction.c | 4 +++-
2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 84d590a9e4ad..409dcbd234dc 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1780,6 +1780,9 @@ sleep:
wake_up_process(root->fs_info->cleaner_kthread);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);

+ if (unlikely(test_bit(BTRFS_FS_STATE_ERROR,
+ &root->fs_info->fs_state)))
+ btrfs_cleanup_transaction(root);
if (!try_to_freeze()) {
set_current_state(TASK_INTERRUPTIBLE);
if (!kthread_should_stop() &&
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 25d64e8e8e47..f98b976ce2b5 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -738,8 +738,10 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
btrfs_run_delayed_iputs(root);

if (trans->aborted ||
- test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))
+ test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) {
+ wake_up_process(info->transaction_kthread);
err = -EIO;
+ }
assert_qgroups_uptodate(trans);

kmem_cache_free(btrfs_trans_handle_cachep, trans);

[Jiri Slaby]

From: "J. Bruce Fields" <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 48385408b45523d9a432c66292d47ef43efcbb94 upstream.

27b11428b7de ("nfsd4: remove lockowner when removing lock stateid")
introduced a memory leak.

Cc: ***@vger.kernel.org
Reported-by: Jeff Layton <***@primarydata.com>
Signed-off-by: J. Bruce Fields <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/nfsd/nfs4state.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index ded7af3c45e1..5ae1dd340073 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3705,7 +3705,7 @@ nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
* correspondance, and we have to delete the lockowner when we
* delete the lock stateid:
*/
- unhash_lockowner(lo);
+ release_lockowner(lo);
return nfs_ok;
}

[Jiri Slaby]

From: Sachin Prabhu <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 39552ea8120a699dbd0360848c4d949f9f0e6deb upstream.

When mounting from a Windows 2012R2 server, we hit the following
problem:
1) Mount with any of the following versions - 2.0, 2.1 or 3.0
2) unmount
3) Attempt a mount again using a different SMB version >= 2.0.

You end up with the following failure:
Status code returned 0xc0000203 STATUS_USER_SESSION_DELETED
CIFS VFS: Send error in SessSetup = -5
CIFS VFS: cifs_mount failed w/return code = -5

I cannot reproduce this issue using a Windows 2008 R2 server.

This appears to be caused because we use the same client guid for the
connection on first mount which we then disconnect and attempt to mount
again using a different protocol version. By generating a new guid each
time a new connection is Negotiated, we avoid hitting this problem.

Signed-off-by: Sachin Prabhu <***@redhat.com>
Signed-off-by: Steve French <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/cifs/cifsfs.c | 8 --------
fs/cifs/cifsglob.h | 1 +
fs/cifs/connect.c | 3 +++
fs/cifs/smb2pdu.c | 5 +++--
fs/cifs/smb2pdu.h | 2 --
5 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index b38bd052ce6d..b9f5709b54ca 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -87,10 +87,6 @@ extern mempool_t *cifs_mid_poolp;

struct workqueue_struct *cifsiod_wq;

-#ifdef CONFIG_CIFS_SMB2
-__u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
-#endif
-
/*
* Bumps refcount for cifs super block.
* Note that it should be only called if a referece to VFS super block is
@@ -1192,10 +1188,6 @@ init_cifs(void)
spin_lock_init(&cifs_file_list_lock);
spin_lock_init(&GlobalMid_Lock);

-#ifdef CONFIG_CIFS_SMB2
- get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
-#endif
-
if (cifs_max_pending < 2) {
cifs_max_pending = 2;
cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index b6e1b2f36b69..465b65488b27 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -547,6 +547,7 @@ struct TCP_Server_Info {
int echo_credits; /* echo reserved slots */
int oplock_credits; /* oplock break reserved slots */
bool echoes:1; /* enable echoes */
+ __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
#endif
u16 dialect; /* dialect index that server chose */
bool oplocks:1; /* enable oplocks */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index a279ffc0bc29..89b5519085c2 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2144,6 +2144,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
sizeof(tcp_ses->srcaddr));
memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
sizeof(tcp_ses->dstaddr));
+#ifdef CONFIG_CIFS_SMB2
+ get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
+#endif
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index c54d7eb39b41..37de258d9a34 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -375,7 +375,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)

req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);

- memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
+ memcpy(req->ClientGUID, server->client_guid, SMB2_CLIENT_GUID_SIZE);

iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */
@@ -478,7 +478,8 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)

vneg_inbuf.Capabilities =
cpu_to_le32(tcon->ses->server->vals->req_capabilities);
- memcpy(vneg_inbuf.Guid, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
+ memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
+ SMB2_CLIENT_GUID_SIZE);

if (tcon->ses->sign)
vneg_inbuf.SecurityMode =
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 870f97303ef3..6133a4e45c6e 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -166,8 +166,6 @@ struct smb2_symlink_err_rsp {

#define SMB2_CLIENT_GUID_SIZE 16

-extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
-
struct smb2_negotiate_req {
struct smb2_hdr hdr;
__le16 StructureSize; /* Must be 36 */

[Jiri Slaby]

From: Konstantin Khlebnikov <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ebe06187bf2aec10d537ce4595e416035367d703 upstream.

This fixes use-after-free of epi->fllink.next inside list loop macro.
This loop actually releases elements in the body. The list is
rcu-protected but here we cannot hold rcu_read_lock because we need to
lock mutex inside.

The obvious solution is to use list_for_each_entry_safe(). RCU-ness
isn't essential because nobody can change this list under us, it's final
fput for this file.

The bug was introduced by ae10b2b4eb01 ("epoll: optimize EPOLL_CTL_DEL
using rcu")

Signed-off-by: Konstantin Khlebnikov <***@gmail.com>
Reported-by: Cyrill Gorcunov <***@openvz.org>
Cc: Stable <***@vger.kernel.org> # 3.13+
Cc: Sasha Levin <***@oracle.com>
Cc: Jason Baron <***@akamai.com>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/eventpoll.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index d76c9744c774..55ebb8886014 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -910,7 +910,7 @@ static const struct file_operations eventpoll_fops = {
void eventpoll_release_file(struct file *file)
{
struct eventpoll *ep;
- struct epitem *epi;
+ struct epitem *epi, *next;

/*
* We don't want to get "file->f_lock" because it is not
@@ -926,7 +926,7 @@ void eventpoll_release_file(struct file *file)
* Besides, ep_remove() acquires the lock, so we can't hold it here.
*/
mutex_lock(&epmutex);
- list_for_each_entry_rcu(epi, &file->f_ep_links, fllink) {
+ list_for_each_entry_safe(epi, next, &file->f_ep_links, fllink) {
ep = epi->ep;
mutex_lock_nested(&ep->mtx, 0);
ep_remove(ep, epi);

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 140cb81ac8c625942a1d695875932c615767a526 upstream.

The current ACM runtime-suspend implementation is broken in several
ways:

Firstly, it buffers only the first write request being made while
suspended -- any further writes are silently dropped.

Secondly, writes being dropped also leak write urbs, which are never
reclaimed (until the device is unbound).

Thirdly, even the single buffered write is not cleared at shutdown
(which may happen before the device is resumed), something which can
lead to another urb leak as well as a PM usage-counter leak.

Fix this by implementing a delayed-write queue using urb anchors and
making sure to discard the queue properly at shutdown.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Reported-by: Xiao Jin <***@intel.com>
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 32 ++++++++++++++++++++++----------
drivers/usb/class/cdc-acm.h | 2 +-
2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 19263a3f3d0d..d9e346cf1eb8 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -559,6 +559,8 @@ static void acm_port_destruct(struct tty_port *port)
static void acm_port_shutdown(struct tty_port *port)
{
struct acm *acm = container_of(port, struct acm, port);
+ struct urb *urb;
+ struct acm_wb *wb;
int i;

dev_dbg(&acm->control->dev, "%s\n", __func__);
@@ -567,6 +569,16 @@ static void acm_port_shutdown(struct tty_port *port)
if (!acm->disconnected) {
usb_autopm_get_interface(acm->control);
acm_set_control(acm, acm->ctrlout = 0);
+
+ for (;;) {
+ urb = usb_get_from_anchor(&acm->delayed);
+ if (!urb)
+ break;
+ wb = urb->context;
+ wb->use = 0;
+ usb_autopm_put_interface_async(acm->control);
+ }
+
usb_kill_urb(acm->ctrlurb);
for (i = 0; i < ACM_NW; i++)
usb_kill_urb(acm->wb[i].urb);
@@ -634,12 +646,9 @@ static int acm_tty_write(struct tty_struct *tty,

usb_autopm_get_interface_async(acm->control);
if (acm->susp_count) {
- if (!acm->delayed_wb)
- acm->delayed_wb = wb;
- else
- usb_autopm_put_interface_async(acm->control);
+ usb_anchor_urb(wb->urb, &acm->delayed);
spin_unlock_irqrestore(&acm->write_lock, flags);
- return count; /* A white lie */
+ return count;
}
usb_mark_last_busy(acm->dev);

@@ -1176,6 +1185,7 @@ made_compressed_probe:
acm->bInterval = epread->bInterval;
tty_port_init(&acm->port);
acm->port.ops = &acm_port_ops;
+ init_usb_anchor(&acm->delayed);

buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
if (!buf) {
@@ -1445,7 +1455,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
static int acm_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
- struct acm_wb *wb;
+ struct urb *urb;
int rv = 0;

spin_lock_irq(&acm->read_lock);
@@ -1457,10 +1467,12 @@ static int acm_resume(struct usb_interface *intf)
if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);

- if (acm->delayed_wb) {
- wb = acm->delayed_wb;
- acm->delayed_wb = NULL;
- acm_start_wb(acm, wb);
+ for (;;) {
+ urb = usb_get_from_anchor(&acm->delayed);
+ if (!urb)
+ break;
+
+ acm_start_wb(acm, urb->context);
}

/*
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 0f76e4af600e..1683ac161cf6 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -117,7 +117,7 @@ struct acm {
unsigned int throttled:1; /* actually throttled */
unsigned int throttle_req:1; /* throttle requested */
u8 bInterval;
- struct acm_wb *delayed_wb; /* write queued for a device about to be woken */
+ struct usb_anchor delayed; /* writes queued for a device about to be woken */
};

#define CDC_DATA_INTERFACE_TYPE 0x0a

[Jiri Slaby]

From: Greg Kroah-Hartman <***@linuxfoundation.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 206204a1162b995e2185275167b22468c00d6b36 upstream.

Given some pathologically compressed data, lz4 could possibly decide to
wrap a few internal variables, causing unknown things to happen. Catch
this before the wrapping happens and abort the decompression.

Reported-by: "Don A. Bailey" <***@securitymouse.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
lib/lz4/lz4_decompress.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index df6839e3ce08..99a03acb7d47 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -72,6 +72,8 @@ static int lz4_uncompress(const char *source, char *dest, int osize)
len = *ip++;
for (; len == 255; length += 255)
len = *ip++;
+ if (unlikely(length > (size_t)(length + len)))
+ goto _output_error;
length += len;
}

[Jiri Slaby]

From: Lidong Zhong <***@suse.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 883854c5457a97190f7b0ee20f03bcd9664fc0c2 upstream.

The connection struct with nodeid 0 is the listening socket,
not a connection to another node. The sctp resend function
was not checking that the nodeid was valid (non-zero), so it
would mistakenly get and resend on the listening connection
when nodeid was zero.

Signed-off-by: Lidong Zhong <***@suse.com>
Signed-off-by: David Teigland <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/dlm/lowcomms.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index a5e34dd6a32c..1381d3fb3738 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -617,6 +617,11 @@ static void retry_failed_sctp_send(struct connection *recv_con,
int nodeid = sn_send_failed->ssf_info.sinfo_ppid;

log_print("Retry sending %d bytes to node id %d", len, nodeid);
+
+ if (!nodeid) {
+ log_print("Shouldn't resend data via listening connection.");
+ return;
+ }

con = nodeid2con(nodeid, 0);
if (!con) {

[Jiri Slaby]

From: Josef Bacik <***@fusionio.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b6d08f0630d51ec09d67f16f6d7839699bbc0402 upstream.

I've been testing our error paths and I was tripping the BUG_ON() in
drop_outstanding_extent because our outstanding_extents is 0 for space cache
inodes. This is because we don't reserve metadata space for these inodes since
we depend on the global block reserve for our space. To fix this we need to
make sure the DO_ACCOUNTING stuff doesn't actually call release_metadata for
space cache inodes. With this patch I'm no longer panicing. Thanks,

Signed-off-by: Josef Bacik <***@fusionio.com>
Signed-off-by: Chris Mason <***@fusionio.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/inode.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 250ed4ef6b91..fa8010c1b628 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1551,7 +1551,13 @@ static void btrfs_clear_bit_hook(struct inode *inode,
spin_unlock(&BTRFS_I(inode)->lock);
}

- if (*bits & EXTENT_DO_ACCOUNTING)
+ /*
+ * We don't reserve metadata space for space cache inodes so we
+ * don't need to call dellalloc_release_metadata if there is an
+ * error.
+ */
+ if (*bits & EXTENT_DO_ACCOUNTING &&
+ root != root->fs_info->tree_root)
btrfs_delalloc_release_metadata(inode, len);

if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ed797074031a37bb9bf4a70952fffc606b77274d upstream.

We should stop I/O unconditionally at suspend rather than rely on the
tty-port initialised flag (which is set prior to stopping I/O during
shutdown) in order to prevent suspend returning with URBs still active.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index d89871b49f11..ae4d028b4209 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1456,8 +1456,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
if (cnt)
return 0;

- if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
- stop_data_traffic(acm);
+ stop_data_traffic(acm);

return 0;
}

[Jiri Slaby]

From: Jeff Layton <***@primarydata.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1b19453d1c6abcfa7c312ba6c9f11a277568fc94 upstream.

Currently, the DRC cache pruner will stop scanning the list when it
hits an entry that is RC_INPROG. It's possible however for a call to
take a *very* long time. In that case, we don't want it to block other
entries from being pruned if they are expired or we need to trim the
cache to get back under the limit.

Fix the DRC cache pruner to just ignore RC_INPROG entries.

Signed-off-by: Jeff Layton <***@primarydata.com>
Signed-off-by: J. Bruce Fields <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/nfsd/nfscache.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index f8f060ffbf4f..6040da8830ff 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -224,13 +224,6 @@ hash_refile(struct svc_cacherep *rp)
hlist_add_head(&rp->c_hash, cache_hash + hash_32(rp->c_xid, maskbits));
}

-static inline bool
-nfsd_cache_entry_expired(struct svc_cacherep *rp)
-{
- return rp->c_state != RC_INPROG &&
- time_after(jiffies, rp->c_timestamp + RC_EXPIRE);
-}
-
/*
* Walk the LRU list and prune off entries that are older than RC_EXPIRE.
* Also prune the oldest ones when the total exceeds the max number of entries.
@@ -242,8 +235,14 @@ prune_cache_entries(void)
long freed = 0;

list_for_each_entry_safe(rp, tmp, &lru_head, c_lru) {
- if (!nfsd_cache_entry_expired(rp) &&
- num_drc_entries <= max_drc_entries)
+ /*
+ * Don't free entries attached to calls that are still
+ * in-progress, but do keep scanning the list.
+ */
+ if (rp->c_state == RC_INPROG)
+ continue;
+ if (num_drc_entries <= max_drc_entries &&
+ time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
break;
nfsd_reply_cache_free_locked(rp);
freed++;

[Jiri Slaby]

From: Anatol Pomozov <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e02ba72aabfade4c9cd6e3263e9b57bf890ad25c upstream.

deletes aio context and all resources related to. It makes sense that
no IO operations connected to the context should be running after the context
is destroyed. As we removed io_context we have no chance to
get requests status or call io_getevents().

man page for io_destroy says that this function may block until
all context's requests are completed. Before kernel 3.11 io_destroy()
blocked indeed, but since aio refactoring in 3.11 it is not true anymore.

Here is a pseudo-code that shows a testcase for a race condition discovered
in 3.11:

initialize io_context
io_submit(read to buffer)
io_destroy()

// context is destroyed so we can free the resources
free(buffers);

// if the buffer is allocated by some other user he'll be surprised
// to learn that the buffer still filled by an outstanding operation
// from the destroyed io_context

The fix is straight-forward - add a completion struct and wait on it
in io_destroy, complete() should be called when number of in-fligh requests
reaches zero.

If two or more io_destroy() called for the same context simultaneously then
only the first one waits for IO completion, other calls behaviour is undefined.

Tested: ran http://pastebin.com/LrPsQ4RL testcase for several hours and
do not see the race condition anymore.

Signed-off-by: Anatol Pomozov <***@gmail.com>
Signed-off-by: Benjamin LaHaise <***@kvack.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/aio.c | 36 ++++++++++++++++++++++++++++++++----
1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 04cd7686555d..a0ed6c7d2cd2 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -112,6 +112,11 @@ struct kioctx {

struct work_struct free_work;

+ /*
+ * signals when all in-flight requests are done
+ */
+ struct completion *requests_done;
+
struct {
/*
* This counts the number of available slots in the ringbuffer,
@@ -508,6 +513,10 @@ static void free_ioctx_reqs(struct percpu_ref *ref)
{
struct kioctx *ctx = container_of(ref, struct kioctx, reqs);

+ /* At this point we know that there are no any in-flight requests */
+ if (ctx->requests_done)
+ complete(ctx->requests_done);
+
INIT_WORK(&ctx->free_work, free_ioctx);
schedule_work(&ctx->free_work);
}
@@ -718,7 +727,8 @@ err:
* when the processes owning a context have all exited to encourage
* the rapid destruction of the kioctx.
*/
-static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx)
+static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx,
+ struct completion *requests_done)
{
if (!atomic_xchg(&ctx->dead, 1)) {
struct kioctx_table *table;
@@ -747,7 +757,11 @@ static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx)
if (ctx->mmap_size)
vm_munmap(ctx->mmap_base, ctx->mmap_size);

+ ctx->requests_done = requests_done;
percpu_ref_kill(&ctx->users);
+ } else {
+ if (requests_done)
+ complete(requests_done);
}
}

@@ -809,7 +823,7 @@ void exit_aio(struct mm_struct *mm)
*/
ctx->mmap_size = 0;

- kill_ioctx(mm, ctx);
+ kill_ioctx(mm, ctx, NULL);
}
}

@@ -1185,7 +1199,7 @@ SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
if (!IS_ERR(ioctx)) {
ret = put_user(ioctx->user_id, ctxp);
if (ret)
- kill_ioctx(current->mm, ioctx);
+ kill_ioctx(current->mm, ioctx, NULL);
percpu_ref_put(&ioctx->users);
}

@@ -1203,8 +1217,22 @@ SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
{
struct kioctx *ioctx = lookup_ioctx(ctx);
if (likely(NULL != ioctx)) {
- kill_ioctx(current->mm, ioctx);
+ struct completion requests_done =
+ COMPLETION_INITIALIZER_ONSTACK(requests_done);
+
+ /* Pass requests_done to kill_ioctx() where it can be set
+ * in a thread-safe way. If we try to set it here then we have
+ * a race condition if two io_destroy() called simultaneously.
+ */
+ kill_ioctx(current->mm, ioctx, &requests_done);
percpu_ref_put(&ioctx->users);
+
+ /* Wait until all IO for the context are done. Otherwise kernel
+ * keep using user-space buffers even if user thinks the context
+ * is destroyed.
+ */
+ wait_for_completion(&requests_done);
+
return 0;
}
pr_debug("EINVAL: io_destroy: invalid context id\n");

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e4c36076c2a6195ec62c35b03c3fde84d0087dc8 upstream.

Make sure to kill any already submitted read urbs on read-urb submission
failures in open in order to prevent doing I/O for a closed port.

Fixes: 088c64f81284 ("USB: cdc-acm: re-write read processing")
Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 6774bf165083..ebbe89f60f7b 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -494,6 +494,7 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
{
struct acm *acm = container_of(port, struct acm, port);
int retval = -ENODEV;
+ int i;

dev_dbg(&acm->control->dev, "%s\n", __func__);

@@ -542,6 +543,8 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
return 0;

error_submit_read_urbs:
+ for (i = 0; i < acm->rx_buflimit; i++)
+ usb_kill_urb(acm->read_urbs[i]);
acm->ctrlout = 0;
acm_set_control(acm, acm->ctrlout);
error_set_control:

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 5292afa657d0e790b7479ad8eef9450c1e040b3d upstream.

Make sure only to decrement the PM counters if they were actually
incremented.

Note that the USB PM counter, but not necessarily the driver core PM
counter, is reset when the interface is unbound.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ebbe89f60f7b..669836ae53e0 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -575,12 +575,13 @@ static void acm_port_shutdown(struct tty_port *port)
struct urb *urb;
struct acm_wb *wb;
int i;
+ int pm_err;

dev_dbg(&acm->control->dev, "%s\n", __func__);

mutex_lock(&acm->mutex);
if (!acm->disconnected) {
- usb_autopm_get_interface(acm->control);
+ pm_err = usb_autopm_get_interface(acm->control);
acm_set_control(acm, acm->ctrlout = 0);

for (;;) {
@@ -598,7 +599,8 @@ static void acm_port_shutdown(struct tty_port *port)
for (i = 0; i < acm->rx_buflimit; i++)
usb_kill_urb(acm->read_urbs[i]);
acm->control->needs_remote_wakeup = 0;
- usb_autopm_put_interface(acm->control);
+ if (!pm_err)
+ usb_autopm_put_interface(acm->control);
}
mutex_unlock(&acm->mutex);
}

[Jiri Slaby]

From: Johan Hovold <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 183a45087d126d126e8dd1d9b2602fc129dff9ad upstream.

Make sure to check return value of autopm get in write() in order to
avoid urb leak and PM counter imbalance on errors.

Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <***@gmail.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/class/cdc-acm.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ae4d028b4209..6774bf165083 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -654,7 +654,13 @@ static int acm_tty_write(struct tty_struct *tty,
memcpy(wb->buf, buf, count);
wb->len = count;

- usb_autopm_get_interface_async(acm->control);
+ stat = usb_autopm_get_interface_async(acm->control);
+ if (stat) {
+ wb->use = 0;
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return stat;
+ }
+
if (acm->susp_count) {
usb_anchor_urb(wb->urb, &acm->delayed);
spin_unlock_irqrestore(&acm->write_lock, flags);

[Jiri Slaby]

From: Michal Kubecek <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 21ee543edc0dea36ab58d24523fcd42b8a270df8 upstream.

The xfrm_user module registers its pernet init/exit after xfrm
itself so that its net exit function xfrm_user_net_exit() is
executed before xfrm_net_exit() which calls xfrm_state_fini() to
cleanup the SA's (xfrm states). This opens a window between
zeroing net->xfrm.nlsk pointer and deleting all xfrm_state
instances which may access it (via the timer). If an xfrm state
expires in this window, xfrm_exp_state_notify() will pass null
pointer as socket to nlmsg_multicast().

As the notifications are called inside rcu_read_lock() block, it
is sufficient to retrieve the nlsk socket with rcu_dereference()
and check the it for null.

Signed-off-by: Michal Kubecek <***@suse.cz>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/xfrm/xfrm_user.c | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 352dfa4c39ee..32a2dd39b785 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -930,6 +930,20 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
return skb;
}

+/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
+ * Must be called with RCU read lock.
+ */
+static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
+ u32 pid, unsigned int group)
+{
+ struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
+
+ if (nlsk)
+ return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
+ else
+ return -1;
+}
+
static inline size_t xfrm_spdinfo_msgsize(void)
{
return NLMSG_ALIGN(4)
@@ -2253,7 +2267,7 @@ static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
}
#else
static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
@@ -2440,7 +2454,7 @@ static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
return -EMSGSIZE;
}

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
}

static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
@@ -2455,7 +2469,7 @@ static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event
if (build_aevent(skb, x, c) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
}

static int xfrm_notify_sa_flush(const struct km_event *c)
@@ -2481,7 +2495,7 @@ static int xfrm_notify_sa_flush(const struct km_event *c)

nlmsg_end(skb, nlh);

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
}

static inline size_t xfrm_sa_len(struct xfrm_state *x)
@@ -2568,7 +2582,7 @@ static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)

nlmsg_end(skb, nlh);

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);

out_free_skb:
kfree_skb(skb);
@@ -2659,7 +2673,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
if (build_acquire(skb, x, xt, xp) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
}

/* User gives us xfrm_user_policy_info followed by an array of 0
@@ -2773,7 +2787,7 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct
if (build_polexpire(skb, xp, dir, c) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
}

static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
@@ -2835,7 +2849,7 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_e

nlmsg_end(skb, nlh);

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);

out_free_skb:
kfree_skb(skb);
@@ -2863,7 +2877,7 @@ static int xfrm_notify_policy_flush(const struct km_event *c)

nlmsg_end(skb, nlh);

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);

out_free_skb:
kfree_skb(skb);
@@ -2932,7 +2946,7 @@ static int xfrm_send_report(struct net *net, u8 proto,
if (build_report(skb, proto, sel, addr) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
}

static inline size_t xfrm_mapping_msgsize(void)
@@ -2984,7 +2998,7 @@ static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
if (build_mapping(skb, x, ipaddr, sport) < 0)
BUG();

- return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
}

static struct xfrm_mgr netlink_mgr = {

[Jiri Slaby]

=46rom: Benjamin Poirier <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit cdb3f4a31b64c3a1c6eef40bc01ebc9594c58a8c upstream.

There are many cases where this feature does not improve performance or=
even
reduces it.

=46or example, here are the results from tests that I've run using 3.12=
=2E6 on one
Intel Xeon W3565 and one i7 920 connected by ixgbe adapters. The result=
s are
from the Xeon, but they're similar on the i7. All numbers report the
mean=C2=B1stddev over 10 runs of 10s.

1) latency tests similar to what is described in "c6e1a0d net: Allow no=
-cache
copy from user on transmit"
There is no statistically significant difference between tx-nocache-cop=
y
on/off.
nic irqs spread out (one queue per cpu)

200x netperf -r 1400,1
tx-nocache-copy off
692000=C2=B11000 tps
50/90/95/99% latency (us): 275=C2=B12/643.8=C2=B10.4/799=C2=B11=
/2474.4=C2=B10.3
tx-nocache-copy on
693000=C2=B11000 tps
50/90/95/99% latency (us): 274=C2=B11/644.1=C2=B10.7/800=C2=B12=
/2474.5=C2=B10.7

200x netperf -r 14000,14000
tx-nocache-copy off
86450=C2=B180 tps
50/90/95/99% latency (us): 334.37=C2=B10.02/838=C2=B11/2100=C2=B1=
20/3990=C2=B140
tx-nocache-copy on
86110=C2=B160 tps
50/90/95/99% latency (us): 334.28=C2=B10.01/837=C2=B12/2110=C2=B1=
20/3990=C2=B120

2) single stream throughput tests
tx-nocache-copy leads to higher service demand

throughput cpu0 cpu1 demand
(Gb/s) (Gcycle) (Gcycle) (cycle/B)

nic irqs and netperf on cpu0 (1x netperf -T0,0 -t omni -- -d send)

tx-nocache-copy off 9402=C2=B15 9.4=C2=B10.2 0=
=2E80=C2=B10.01
tx-nocache-copy on 9403=C2=B13 9.85=C2=B10.04 0=
=2E838=C2=B10.004

nic irqs on cpu0, netperf on cpu1 (1x netperf -T1,1 -t omni -- -d send)

tx-nocache-copy off 9401=C2=B15 5.83=C2=B10.03 5.0=C2=B10.1 =
0.923=C2=B10.007
tx-nocache-copy on 9404=C2=B12 5.74=C2=B10.03 5.523=C2=B10.=
009 0.958=C2=B10.002

As a second example, here are some results from Eric Dumazet with lates=
t
net-next.
tx-nocache-copy also leads to higher service demand

(cpu is Intel(R) Xeon(R) CPU X5660 @ 2.80GHz)

lpq83:~# ./ethtool -K eth0 tx-nocache-copy on
lpq83:~# perf stat ./netperf -H lpq84 -c
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpq84=
=2Eprod.google.com () port 0 AF_INET
Recv Send Send Utilization Service =
Demand
Socket Socket Message Elapsed Send Recv Send =
Recv
Size Size Size Time Throughput local remote local =
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB =
us/KB

87380 16384 16384 10.00 9407.44 2.50 -1.00 0.522 =
-1.000

Performance counter stats for './netperf -H lpq84 -c':

4282.648396 task-clock # 0.423 CPUs utilized
9,348 context-switches # 0.002 M/sec
88 CPU-migrations # 0.021 K/sec
355 page-faults # 0.083 K/sec
11,812,797,651 cycles # 2.758 GHz =
[82.79%]
9,020,522,817 stalled-cycles-frontend # 76.36% frontend cycles=
idle [82.54%]
4,579,889,681 stalled-cycles-backend # 38.77% backend cycles=
idle [67.33%]
6,053,172,792 instructions # 0.51 insns per cycle
# 1.49 stalled cycles =
per insn [83.64%]
597,275,583 branches # 139.464 M/sec =
[83.70%]
8,960,541 branch-misses # 1.50% of all branches=
[83.65%]

10.128990264 seconds time elapsed

lpq83:~# ./ethtool -K eth0 tx-nocache-copy off
lpq83:~# perf stat ./netperf -H lpq84 -c
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpq84=
=2Eprod.google.com () port 0 AF_INET
Recv Send Send Utilization Service =
Demand
Socket Socket Message Elapsed Send Recv Send =
Recv
Size Size Size Time Throughput local remote local =
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB =
us/KB

87380 16384 16384 10.00 9412.45 2.15 -1.00 0.449 =
-1.000

Performance counter stats for './netperf -H lpq84 -c':

2847.375441 task-clock # 0.281 CPUs utilized
11,632 context-switches # 0.004 M/sec
49 CPU-migrations # 0.017 K/sec
354 page-faults # 0.124 K/sec
7,646,889,749 cycles # 2.686 GHz =
[83.34%]
6,115,050,032 stalled-cycles-frontend # 79.97% frontend cycles=
idle [83.31%]
1,726,460,071 stalled-cycles-backend # 22.58% backend cycles=
idle [66.55%]
2,079,702,453 instructions # 0.27 insns per cycle
# 2.94 stalled cycles =
per insn [83.22%]
363,773,213 branches # 127.757 M/sec =
[83.29%]
4,242,732 branch-misses # 1.17% of all branches=
[83.51%]

10.128449949 seconds time elapsed

CC: Tom Herbert <***@google.com>
Signed-off-by: Benjamin Poirier <***@suse.de>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/core/dev.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 58990d60e65b..704c0c5bed1f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5636,13 +5636,8 @@ int register_netdevice(struct net_device *dev)
dev->features |=3D NETIF_F_SOFT_FEATURES;
dev->wanted_features =3D dev->features & dev->hw_features;
=20
- /* Turn on no cache copy if HW is doing checksum */
if (!(dev->flags & IFF_LOOPBACK)) {
dev->hw_features |=3D NETIF_F_NOCACHE_COPY;
- if (dev->features & NETIF_F_ALL_CSUM) {
- dev->wanted_features |=3D NETIF_F_NOCACHE_COPY;
- dev->features |=3D NETIF_F_NOCACHE_COPY;
- }
}
=20
/* Make NETIF_F_HIGHDMA inheritable to VLAN devices.
--=20
2.0.0

[Jiri Slaby]

From: Liu Bo <***@oracle.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cd857dd6bc2ae9ecea14e75a34e8a8fdc158e307 upstream.

We want to make sure the point is still within the extent item, not to verify
the memory it's pointing to.

Signed-off-by: Liu Bo <***@oracle.com>
Signed-off-by: Chris Mason <***@fb.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/btrfs/backref.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 5eb50b5df777..79559682255a 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1409,7 +1409,7 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
*out_eiref = (struct btrfs_extent_inline_ref *)(ei + 1);
}
*ptr = (unsigned long)*out_eiref;
- if ((void *)*ptr >= (void *)ei + item_size)
+ if ((unsigned long)(*ptr) >= (unsigned long)ei + item_size)
return -ENOENT;
}