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REPORT LUNS should not fail just because the allocation length is less
than 16. The relevant section of SPC-4 is:
4.2.5.6 Allocation length
The ALLOCATION LENGTH field specifies the maximum number of bytes or
blocks that an application client has allocated in the Data-In
Buffer. The ALLOCATION LENGTH field specifies bytes unless a
different requirement is stated in the command definition.
An allocation length of zero specifies that no data shall be
transferred. This condition shall not be considered an error.
So we should just truncate our response rather than return an error.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Spencer Baugh <sbaugh@catern.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fix from Vinod Koul:
"We recently found issue with dma_request_slave_channel() API causing
privatecnt value to go bad. This is fixed by balancing the privatecnt"
* tag 'dmaengine-fix-4.2-rc8' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: fix balance of privatecnt inc/dec operations
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The routines in scsi_rpm.c assume that if a runtime-PM callback is
invoked for a SCSI device, it can only mean that the device's driver
has asked the block layer to handle the runtime power management (by
calling blk_pm_runtime_init(), which among other things sets q->dev).
However, this assumption turns out to be wrong for things like the ses
driver. Normally ses devices are not allowed to do runtime PM, but
userspace can override this setting. If this happens, the kernel gets
a NULL pointer dereference when blk_post_runtime_resume() tries to use
the uninitialized q->dev pointer.
This patch fixes the problem by calling the block layer's runtime-PM
routines only if the device's driver really does have a runtime-PM
callback routine. Since ses doesn't define any such callbacks, the
crash won't occur.
This fixes Bugzilla #101371.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Stanisław Pitucha <viraptor@gmail.com>
Reported-by: Ilan Cohen <ilanco@gmail.com>
Tested-by: Ilan Cohen <ilanco@gmail.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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fnic_queuecommand() to avoid deadloack
We added changes in fnic driver patch 1.6.0.16 to acquire
io_req_lock in fnic_queuecommand() before issuing I/O so that io completion
is serialized. But when releasing the lock we check for the I/O flag and
this could be modified if IO abort occurs before I/O completion. In this case
we wont release the lock and causes deadlock in some scenerios. Using the
local variable to check the IO lock status will resolve the problem.
Fixes: 41df7b02db82cf6c14f094757bac3830d10a827f
Signed-off-by: Hiral Shah <hishah@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Anil Chintalapati <achintal@cisco.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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Pull drm fixes from Dave Airlie:
"These came in late last week, I wanted to look over the mst one before
forwarding, but it seems good.
Just three i915 and one MST fix"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/i915: Commit planes on each crtc separately.
drm/i915: calculate primary visibility changes instead of calling from set_config
drm/i915: Only dither on 6bpc panels
drm/dp/mst: Remove port after removing connector.
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If PM is enabled but PM_SLEEP is disabled, the suspend/resume functions
are still unused and produce a compiler warning.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: <stable@vger.kernel.org> # 4.1+
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git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma bugfix from Doug Ledford:
"Bugfix in iw_cxgb4"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
iw_cxgb4: gracefully handle unknown CQE status errors
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Three minor device-specific fixes and revert of NCQ autosense added
during this -rc1.
It turned out that NCQ autosense as currently implemented interferes
with the usual error handling behavior. It will be revisited in the
near future"
* 'for-4.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ata: ahci_brcmstb: Fix misuse of IS_ENABLED
sata_sx4: Check return code from pdc20621_i2c_read()
Revert "libata: Implement NCQ autosense"
Revert "libata: Implement support for sense data reporting"
Revert "libata-eh: Set 'information' field for autosense"
ata: ahci_brcmstb: Fix warnings with CONFIG_PM_SLEEP=n
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drivers/net/phy/smsc.c:127:3-4: Unneeded semicolon
Remove unneeded semicolon.
Generated by: scripts/coccinelle/misc/semicolon.cocci
CC: Igor Plyatov <plyatov@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is an HP-branded Sierra Wireless EM7355:
https://bugzilla.redhat.com/show_bug.cgi?id=1223646#c2
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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VxLAN offloading is not functional if the NIC is running in multichannel
mode (UMC, FLEX-10, VNIC...). Enabling this additionally kills whole
connectivity through the NIC and the device needs to be down and up to
restore it. The firmware should take care about it and does not allow
the conversion of interface to tunnel type (be_cmd_manage_iface) or should
support VxLAN offloading if multichannel config is enabled.
I have tested this on the latest available firmware (10.6.144.21).
Result:
[root@sm-04 ~]# ip link set enp5s0f0 up[root@sm-04 ~]# ip addr add 172.30.10.50/24 dev enp5s0f0
[root@sm-04 ~]# ping -c 3 172.30.10.254PING 172.30.10.254 (172.30.10.254) 56(84) bytes of data.
64 bytes from 172.30.10.254: icmp_seq=1 ttl=64 time=0.317 ms
64 bytes from 172.30.10.254: icmp_seq=2 ttl=64 time=0.187 ms
64 bytes from 172.30.10.254: icmp_seq=3 ttl=64 time=0.188 ms
--- 172.30.10.254 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.187/0.230/0.317/0.063 ms
[root@sm-04 ~]# ip link add link enp5s0f0 vxlan10 type vxlan id 10 remote 172.30.10.60 dstport 4789
[root@sm-04 ~]# ip link set vxlan10 up
[ 7900.442811] be2net 0000:05:00.0: Enabled VxLAN offloads for UDP port 4789
[ 7900.455722] be2net 0000:05:00.1: Enabled VxLAN offloads for UDP port 4789
[ 7900.468635] be2net 0000:05:00.2: Enabled VxLAN offloads for UDP port 4789
[ 7900.481553] be2net 0000:05:00.3: Enabled VxLAN offloads for UDP port 4789
[root@sm-04 ~]# ping -c 3 172.30.10.254
PING 172.30.10.254 (172.30.10.254) 56(84) bytes of data.
--- 172.30.10.254 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 1999ms
[root@sm-04 ~]# ip link set vxlan10 down
[ 7959.434093] be2net 0000:05:00.0: Disabled VxLAN offloads for UDP port 4789
[ 7959.444792] be2net 0000:05:00.1: Disabled VxLAN offloads for UDP port 4789
[ 7959.455592] be2net 0000:05:00.2: Disabled VxLAN offloads for UDP port 4789
[ 7959.466416] be2net 0000:05:00.3: Disabled VxLAN offloads for UDP port 4789
[root@sm-04 ~]# ip link del vxlan10
[root@sm-04 ~]# ping -c 3 172.30.10.254
PING 172.30.10.254 (172.30.10.254) 56(84) bytes of data.
--- 172.30.10.254 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 1999ms
[root@sm-04 ~]# ip link set enp5s0f0 down
[root@sm-04 ~]# ip link set enp5s0f0 up
[ 8071.019003] be2net 0000:05:00.0 enp5s0f0: Link is Up
[root@sm-04 ~]# ping -c 3 172.30.10.254
PING 172.30.10.254 (172.30.10.254) 56(84) bytes of data.
64 bytes from 172.30.10.254: icmp_seq=1 ttl=64 time=0.318 ms
64 bytes from 172.30.10.254: icmp_seq=2 ttl=64 time=0.196 ms
64 bytes from 172.30.10.254: icmp_seq=3 ttl=64 time=0.194 ms
--- 172.30.10.254 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.194/0.236/0.318/0.057 ms
Cc: Sathya Perla <sathya.perla@avagotech.com>
Cc: Ajit Khaparde <ajit.khaparde@avagotech.com>
Cc: Padmanabh Ratnakar <padmanabh.ratnakar@avagotech.com>
Cc: Sriharsha Basavapatna <sriharsha.basavapatna@avagotech.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Ajit Khaparde <ajit.khaparde@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* Due to HW bug, LAN8700 sometimes does not detect presence of energy in the
Ethernet cable in Energy Detect Power-Down mode (e.g while EDPWRDOWN bit is
set, the ENERGYON bit does not asserted sometimes). This is a common bug of
LAN87xx family of PHY chips.
* The lan87xx_read_status() was improved to acquire ENERGYON bit. Its previous
algorythm still not reliable on 100 % and sometimes skip cable plugging.
Signed-off-by: Igor Plyatov <plyatov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The dma_mapping_error() function returns true or false. We should
return -ENOMEM if it there is a dma mapping error.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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PPP devices may get automatically unregistered when their network
namespace is getting removed. This happens if the ppp control plane
daemon (e.g. pppd) exits while it is the last user of this namespace.
This leads to several races:
* ppp_exit_net() may destroy the per namespace idr (pn->units_idr)
before all file descriptors were released. Successive ppp_release()
calls may then cleanup PPP devices with ppp_shutdown_interface() and
try to use the already destroyed idr.
* Automatic device unregistration may also happen before the
ppp_release() call for that device gets executed. Once called on
the file owning the device, ppp_release() will then clean it up and
try to unregister it a second time.
To fix these issues, operations defined in ppp_shutdown_interface() are
moved to the PPP device's ndo_uninit() callback. This allows PPP
devices to be properly cleaned up by unregister_netdev() and friends.
So checking for ppp->owner is now an accurate test to decide if a PPP
device should be unregistered.
Setting ppp->owner is done in ppp_create_interface(), before device
registration, in order to avoid unprotected modification of this field.
Finally, ppp_exit_net() now starts by unregistering all remaining PPP
devices to ensure that none will get unregistered after the call to
idr_destroy().
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, if phy state is PHY_RUNNING, we always register a CHANGE
when phy works in polling or interrupt ignored, this will make the
adjust_link being called even the phy link did Not changed.
checking the phy link to make sure the link did changed before we
register a CHANGE, if link did not changed, we do nothing.
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch increments privatecnt value and set DMA_PRIVATE in device
caps in dma_request_slave_channel() function. This is needed to keep
privatecnt increment/decrement balance.
As function dma_release_channel() decrements privatecnt counter, we need
to increment it when channel is requested. Otherwise privatecnt drops
into negatives after few dma_release_channel() calls.
Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Pull crypto fixes from Herbert Xu:
"This fixes the following issues:
- a regression caused by the conversion of IPsec ESP to the new AEAD
interface: ESN with authencesn no longer works because it relied on
the AD input SG list having a specific layout which is no longer
the case. In linux-next authencesn is fixed properly and no longer
assumes anything about the SG list format. While for this release
a minimal fix is applied to authencesn so that it works with the
new linear layout.
- fix memory corruption caused by bogus index in the caam hash code.
- fix powerpc nx SHA hashing which could cause module load failures
if module signature verification is enabled"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: caam - fix memory corruption in ahash_final_ctx
crypto: nx - respect sg limit bounds when building sg lists for SHA
crypto: authencesn - Fix breakage with new ESP code
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Everytime we use the logical context with execlists it becomes dirty (as
the hardware will write the new register values afterwards, as well as
the GPU state that will be used). We need to then flag the context as
dirty everytime since after a swap-out/swap-in cycle the dirty flag will
be cleared, and a further swap-out cycle will then loose the most recent
GPU state.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A smallish batch of fixes, a little more than expected this late, but
all fixes are contained to their platforms and seem reasonably low
risk:
- a somewhat large SMP fix for ux500 that still seemed warranted to
include here
- OMAP DT fixes for pbias regulator specification that broke due to
some DT reshuffling
- PCIe IRQ routing bugfix for i.MX
- networking fixes for keystone
- runtime PM for OMAP GPMC
- a couple of error path bug fixes for exynos"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: keystone: Fix the mdio bindings by moving it to soc specific file
ARM: dts: keystone: fix the clock node for mdio
memory: omap-gpmc: Don't try to save uninitialized GPMC context
ARM: imx6: correct i.MX6 PCIe interrupt routing
ARM: ux500: add an SMP enablement type and move cpu nodes
ARM: dts: dra7: Fix broken pbias device creation
ARM: dts: OMAP5: Fix broken pbias device creation
ARM: dts: OMAP4: Fix broken pbias device creation
ARM: dts: omap243x: Fix broken pbias device creation
ARM: EXYNOS: fix double of_node_put() on error path
ARM: EXYNOS: Fix potentian kfree() of ro memory
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This has two libfc fixes for bugs causing rare crashes, one iscsi fix
for a potential hang on shutdown, and a fix for an I/O blocksize issue
which caused a regression"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
sd: Fix maximum I/O size for BLOCK_PC requests
libfc: Fix fc_fcp_cleanup_each_cmd()
libfc: Fix fc_exch_recv_req() error path
libiscsi: Fix host busy blocking during connection teardown
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git://anongit.freedesktop.org/drm-intel into drm-next
single MST fixes from Maarten.
* tag 'topic/drm-fixes-2015-08-14' of git://anongit.freedesktop.org/drm-intel:
drm/dp/mst: Remove port after removing connector.
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git://anongit.freedesktop.org/drm-intel into drm-next
three display fixes for Intel.
* tag 'drm-intel-fixes-2015-08-14' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Commit planes on each crtc separately.
drm/i915: calculate primary visibility changes instead of calling from set_config
drm/i915: Only dither on 6bpc panels
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policy->max is the maximum allowed frequency defined by user and
clipped_freq is the maximum that thermal constraints allow.
If clipped_freq is lower than policy->max, then we need to readjust
policy->max.
But, if clipped_freq is greater than policy->max, we don't need to do
anything. We used to call cpufreq_verify_within_limits() in this case,
but it doesn't change anything in this case.
Lets skip this unnecessary call and write a comment that explains this.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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That's what it is for, lets name it properly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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That's what it is for, lets name it properly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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We just need to take care of single event here and there is no need to
increase indentation level of most of the code (which causes lines
longer that 80 columns to break).
Kill the switch block.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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If a valid cpufreq_dev is found for policy->cpu, we should update the
policy and quit the for loop. There is no need to keep traversing the
list of cpufreq_dev's.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Its always set before getting used, don't initialize it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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A recent change to the cpu_cooling code introduced a AB-BA deadlock
scenario between the cpufreq_policy_notifier_list rwsem and the
cooling_cpufreq_lock. This is caused by cooling_cpufreq_lock being held
before the registration/removal of the notifier block (an operation
which takes the rwsem), and the notifier code itself which takes the
locks in the reverse order:
======================================================
[ INFO: possible circular locking dependency detected ]
3.18.0+ #1453 Not tainted
-------------------------------------------------------
rc.local/770 is trying to acquire lock:
(cooling_cpufreq_lock){+.+.+.}, at: [<c04abfc4>] cpufreq_thermal_notifier+0x34/0xfc
but task is already holding lock:
((cpufreq_policy_notifier_list).rwsem){++++.+}, at: [<c0042f04>] __blocking_notifier_call_chain+0x34/0x68
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 ((cpufreq_policy_notifier_list).rwsem){++++.+}:
[<c06bc3b0>] down_write+0x44/0x9c
[<c0043444>] blocking_notifier_chain_register+0x28/0xd8
[<c04ad610>] cpufreq_register_notifier+0x68/0x90
[<c04abe4c>] __cpufreq_cooling_register.part.1+0x120/0x180
[<c04abf44>] __cpufreq_cooling_register+0x98/0xa4
[<c04abf8c>] cpufreq_cooling_register+0x18/0x1c
[<bf0046f8>] imx_thermal_probe+0x1c0/0x470 [imx_thermal]
[<c037cef8>] platform_drv_probe+0x50/0xac
[<c037b710>] driver_probe_device+0x114/0x234
[<c037b8cc>] __driver_attach+0x9c/0xa0
[<c0379d68>] bus_for_each_dev+0x5c/0x90
[<c037b204>] driver_attach+0x24/0x28
[<c037ae7c>] bus_add_driver+0xe0/0x1d8
[<c037c0cc>] driver_register+0x80/0xfc
[<c037cd80>] __platform_driver_register+0x50/0x64
[<bf007018>] 0xbf007018
[<c0008a5c>] do_one_initcall+0x88/0x1d8
[<c0095da4>] load_module+0x1768/0x1ef8
[<c0096614>] SyS_init_module+0xe0/0xf4
[<c000ec00>] ret_fast_syscall+0x0/0x48
-> #0 (cooling_cpufreq_lock){+.+.+.}:
[<c00619f8>] lock_acquire+0xb0/0x124
[<c06ba3b4>] mutex_lock_nested+0x5c/0x3d8
[<c04abfc4>] cpufreq_thermal_notifier+0x34/0xfc
[<c0042bf4>] notifier_call_chain+0x4c/0x8c
[<c0042f20>] __blocking_notifier_call_chain+0x50/0x68
[<c0042f58>] blocking_notifier_call_chain+0x20/0x28
[<c04ae62c>] cpufreq_set_policy+0x7c/0x1d0
[<c04af3cc>] store_scaling_governor+0x74/0x9c
[<c04ad418>] store+0x90/0xc0
[<c0175384>] sysfs_kf_write+0x54/0x58
[<c01746b4>] kernfs_fop_write+0xdc/0x190
[<c010dcc0>] vfs_write+0xac/0x1b4
[<c010dfec>] SyS_write+0x44/0x90
[<c000ec00>] ret_fast_syscall+0x0/0x48
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock((cpufreq_policy_notifier_list).rwsem);
lock(cooling_cpufreq_lock);
lock((cpufreq_policy_notifier_list).rwsem);
lock(cooling_cpufreq_lock);
*** DEADLOCK ***
7 locks held by rc.local/770:
#0: (sb_writers#6){.+.+.+}, at: [<c010dda0>] vfs_write+0x18c/0x1b4
#1: (&of->mutex){+.+.+.}, at: [<c0174678>] kernfs_fop_write+0xa0/0x190
#2: (s_active#52){.+.+.+}, at: [<c0174680>] kernfs_fop_write+0xa8/0x190
#3: (cpu_hotplug.lock){++++++}, at: [<c0026a60>] get_online_cpus+0x34/0x90
#4: (cpufreq_rwsem){.+.+.+}, at: [<c04ad3e0>] store+0x58/0xc0
#5: (&policy->rwsem){+.+.+.}, at: [<c04ad3f8>] store+0x70/0xc0
#6: ((cpufreq_policy_notifier_list).rwsem){++++.+}, at: [<c0042f04>] __blocking_notifier_call_chain+0x34/0x68
stack backtrace:
CPU: 0 PID: 770 Comm: rc.local Not tainted 3.18.0+ #1453
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Backtrace:
[<c00121c8>] (dump_backtrace) from [<c0012360>] (show_stack+0x18/0x1c)
r6:c0b85a80 r5:c0b75630 r4:00000000 r3:00000000
[<c0012348>] (show_stack) from [<c06b6c48>] (dump_stack+0x7c/0x98)
[<c06b6bcc>] (dump_stack) from [<c06b42a4>] (print_circular_bug+0x28c/0x2d8)
r4:c0b85a80 r3:d0071d40
[<c06b4018>] (print_circular_bug) from [<c00613b0>] (__lock_acquire+0x1acc/0x1bb0)
r10:c0b50660 r8:c09e6d80 r7:d0071d40 r6:c11d0f0c r5:00000007 r4:d0072240
[<c005f8e4>] (__lock_acquire) from [<c00619f8>] (lock_acquire+0xb0/0x124)
r10:00000000 r9:c04abfc4 r8:00000000 r7:00000000 r6:00000000 r5:c0a06f0c
r4:00000000
[<c0061948>] (lock_acquire) from [<c06ba3b4>] (mutex_lock_nested+0x5c/0x3d8)
r10:ec853800 r9:c0a06ed4 r8:d0071d40 r7:c0a06ed4 r6:c11d0f0c r5:00000000
r4:c04abfc4
[<c06ba358>] (mutex_lock_nested) from [<c04abfc4>] (cpufreq_thermal_notifier+0x34/0xfc)
r10:ec853800 r9:ec85380c r8:d00d7d3c r7:c0a06ed4 r6:d00d7d3c r5:00000000
r4:fffffffe
[<c04abf90>] (cpufreq_thermal_notifier) from [<c0042bf4>] (notifier_call_chain+0x4c/0x8c)
r7:00000000 r6:00000000 r5:00000000 r4:fffffffe
[<c0042ba8>] (notifier_call_chain) from [<c0042f20>] (__blocking_notifier_call_chain+0x50/0x68)
r8:c0a072a4 r7:00000000 r6:d00d7d3c r5:ffffffff r4:c0a06fc8 r3:ffffffff
[<c0042ed0>] (__blocking_notifier_call_chain) from [<c0042f58>] (blocking_notifier_call_chain+0x20/0x28)
r7:ec98b540 r6:c13ebc80 r5:ed76e600 r4:d00d7d3c
[<c0042f38>] (blocking_notifier_call_chain) from [<c04ae62c>] (cpufreq_set_policy+0x7c/0x1d0)
[<c04ae5b0>] (cpufreq_set_policy) from [<c04af3cc>] (store_scaling_governor+0x74/0x9c)
r7:ec98b540 r6:0000000c r5:ec98b540 r4:ed76e600
[<c04af358>] (store_scaling_governor) from [<c04ad418>] (store+0x90/0xc0)
r6:0000000c r5:ed76e6d4 r4:ed76e600
[<c04ad388>] (store) from [<c0175384>] (sysfs_kf_write+0x54/0x58)
r8:0000000c r7:d00d7f78 r6:ec98b540 r5:0000000c r4:ec853800 r3:0000000c
[<c0175330>] (sysfs_kf_write) from [<c01746b4>] (kernfs_fop_write+0xdc/0x190)
r6:ec98b540 r5:00000000 r4:00000000 r3:c0175330
[<c01745d8>] (kernfs_fop_write) from [<c010dcc0>] (vfs_write+0xac/0x1b4)
r10:0162aa70 r9:d00d6000 r8:0000000c r7:d00d7f78 r6:0162aa70 r5:0000000c
r4:eccde500
[<c010dc14>] (vfs_write) from [<c010dfec>] (SyS_write+0x44/0x90)
r10:0162aa70 r8:0000000c r7:eccde500 r6:eccde500 r5:00000000 r4:00000000
[<c010dfa8>] (SyS_write) from [<c000ec00>] (ret_fast_syscall+0x0/0x48)
r10:00000000 r8:c000edc4 r7:00000004 r6:000216cc r5:0000000c r4:0162aa70
Solve this by moving to finer grained locking - use one mutex to protect
the cpufreq_dev_list as a whole, and a separate lock to ensure correct
ordering of cpufreq notifier registration and removal.
cooling_list_lock is taken within cooling_cpufreq_lock on
(un)registration to preserve the behavior of the code, i.e. to
atomically add/remove to the list and (un)register the notifier.
Fixes: 2dcd851fe4b4 ("thermal: cpu_cooling: Update always cpufreq policy with
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Merge fixes from Andrew Morton:
"11 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
Update maintainers for DRM STI driver
mm: cma: mark cma_bitmap_maxno() inline in header
zram: fix pool name truncation
memory-hotplug: fix wrong edge when hot add a new node
.mailmap: Andrey Ryabinin has moved
ipc/sem.c: update/correct memory barriers
mm/hwpoison: fix panic due to split huge zero page
ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()
ipc,sem: fix use after free on IPC_RMID after a task using same semaphore set exits
mm/hwpoison: fix fail isolate hugetlbfs page w/ refcount held
mm/hwpoison: fix page refcount of unknown non LRU page
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clock fix from Stephen Boyd:
"A one-liner for a regression found in the PXA clock driver"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: pxa: pxa3xx: fix CKEN register access
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zram_meta_alloc() constructs a pool name for zs_create_pool() call as
snprintf(pool_name, sizeof(pool_name), "zram%d", device_id);
However, it defines pool name buffer to be only 8 bytes long (minus
trailing zero), which means that we can have only 1000 pool names: zram0
-- zram999.
With CONFIG_ZSMALLOC_STAT enabled an attempt to create a device zram1000
can fail if device zram100 already exists, because snprintf() will
truncate new pool name to zram100 and pass it debugfs_create_dir(),
causing:
debugfs dir <zram100> creation failed
zram: Error creating memory pool
... and so on.
Fix it by passing zram->disk->disk_name to zram_meta_alloc() instead of
divice_id. We construct zram%d name earlier and keep it as a ->disk_name,
no need to snprintf() it again.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When using reverse polarity for clock (spi-cpol) on a device
the clock line gets altered after chip-select has been asserted
resulting in an additional clock beat, which confuses hardware.
This did not show when using native-CS, as the same register
is used to control cs as well as polarity, so the changes came
into effect at the same time. Unfortunately this is not true
with gpio-cs.
To avoid this situation this patch moves the setup of polarity
(spi-cpol and spi-cpha) outside of the chip-select into
prepare_message, which is run prior to asserting chip-select.
Also fixes resetting 3-wire mode after use of rx-mode, so that
a 3-Wire sequence TX, RX, TX works as well (right now it runs
TX, RX, RX instead)
Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Ingo Molnar:
"A single clocksource driver suspend/resume fix"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clockevents/drivers/sh_cmt: Only perform clocksource suspend/resume if enabled
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The ACK of an inexistent IRQ can trigger an spurious IRQ that breaks the
txrx logic. This has been observed on axi_quad_spi:3.2 core.
This patch only ACKs IRQs that have not been Acknowledge jet.
Reported-by: Edward Kigwana <ekigwana@scires.com>
Tested-by: Edward Kigwana <ekigwana@scires.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
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During probe free the memory allocated to "exynos_info" in case of
unknown SoC type.
Signed-off-by: Shailendra Verma <shailendra.capricorn@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
[k.kozlowski: Rebased the patch around if(of_machine_is_compatible)]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Before this commit, the following would happen:
a) acpi_video_get_backlight_type() gets called
b) acpi_video_get_backlight_type() calls acpi_video_init_backlight_type()
c) acpi_video_init_backlight_type() locks its function static init_mutex
d) acpi_video_init_backlight_type() calls backlight_register_notifier()
e) backlight_register_notifier() takes its notifier-chain lock
And when the backlight notifier chain gets called we've:
1) blocking_notifier_call_chain() gets called
2) blocking_notifier_call_chain() takes the notifier-chain lock
3) blocking_notifier_call_chain() calls acpi_video_backlight_notify()
4) acpi_video_backlight_notify() calls acpi_video_get_backlight_type()
5) acpi_video_get_backlight_type() calls acpi_video_init_backlight_type()
6) acpi_video_init_backlight_type() locks its function static init_mutex
So in the first call sequence we have:
a) init_mutex gets locked
b) notifier-chain gets locked
and in the second call sequence we have:
1) notifier-chain gets locked
2) init_mutex gets locked
And we've a circular locking dependency. This specific locking dependency
is fixable without using the big hammer otherwise known as a workqueue,
but further analysis shows a similar problem with the backlight notifier
chain lock vs register_count_mutex from drivers/acpi/acpi_video.c,
and fixing that becomes problematic.
So this commit simply fixes this with the big hammer, performance
wise this is a non issue as we expect the work to get scheduled
exactly zero or one times during normal system use.
Fixes: 93a291dfaf9c (ACPI / video: Move backlight notifier to video_detect.c)
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reported-and-tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The code in question is called outside of standard driver
probe()/remove() callbacks and thus will not benefit from use of devm*
infrastructure.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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There are some MAC registers that need to be kept in sync
with the link state parameters, see adjust_link().
However, after a MAC soft reset default values for
these registers are assumed. In some cases (excepting
if down/ if up for example) adjust_link() does not see
that these values were reset to default because the
priv->old* link parameters were left unchanged.
So, reset the priv->old* link params as well during a
MAC reset to let adjust_link() restore the MAC link
settings to the actual link state values.
Fixes following case, for example:
Setting link to 100M, changing MTU (implies MAC reset),
link state remains unchanged to 100M but MAC registers
were reset to default (1G) breaking the connectivity w/
the PHY. Closing and re-opening the interface would
restore the MAC link parameters to the correct values.
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reverts commit 1addc1264852
This commit seems to cause crashes in gk104_fifo_intr_runlist() by
returning 0xbad0da00 when register 0x2a00 is read. Since this commit was
intended for GM20B which is not completely supported yet, let's revert
it for the time being.
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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This addresses two issues that cause problems with viewperf maya-03 in
situation with memory pressure.
The first issue causes attempts to unreserve buffers if batched
reservation fails due to, for example, a signal pending. While previously
the ttm_eu api was resistant against this type of error, it is no longer
and the lockdep code will complain about attempting to unreserve buffers
that are not reserved. The issue is resolved by avoid calling
ttm_eu_backoff_reservation in the buffer reserve error path.
The second issue is that the binding_mutex may be held when user-space
fence objects are created and hence during memory reclaims. This may cause
recursive attempts to grab the binding mutex. The issue is resolved by not
holding the binding mutex across fence creation and submission.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
This pull request fixes memory leak and some issues related to
mixer and gscaler driver issues.
* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos/fimc: fix runtime pm support
drm/exynos/mixer: always update INT_EN cache
drm/exynos/mixer: correct vsync configuration sequence
drm/exynos/mixer: fix interrupt clearing
drm/exynos/hdmi: fix edid memory leak
drm/exynos: gsc: fix wrong bitwise operation for swap detection
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- two stable fixes for corruption seen in a snapshot of thinp metadata;
metadata snapshots aren't widely used but help provide a consistent
view of the metadata associated with an active thin-pool.
- a dm-cache fix for the 4.2 "default" policy switch from "mq" to "smq"
* tag 'dm-4.2-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache policy smq: move 'dm-cache-default' module alias to SMQ
dm btree: add ref counting ops for the leaves of top level btrees
dm thin metadata: delete btrees when releasing metadata snapshot
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Pull xen block driver fixes from Jens Axboe:
"A few small bug fixes for xen-blk{front,back} that have been sitting
over my vacation"
* 'for-linus' of git://git.kernel.dk/linux-block:
xen-blkback: replace work_pending with work_busy in purge_persistent_gnt()
xen-blkfront: don't add indirect pages to list when !feature_persistent
xen-blkfront: introduce blkfront_gather_backend_features()
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen bug fixes from David Vrabel:
- revert a fix from 4.2-rc5 that was causing lots of WARNING spam.
- fix a memory leak affecting backends in HVM guests.
- fix PV domU hang with certain configurations.
* tag 'for-linus-4.2-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/xenbus: Don't leak memory when unmapping the ring on HVM backend
Revert "xen/events/fifo: Handle linked events when closing a port"
x86/xen: build "Xen PV" APIC driver for domU as well
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Pull networking fixes from David Miller:
1) Workaround hw bug when acquiring PCI bos ownership of iwlwifi
devices, from Emmanuel Grumbach.
2) Falling back to vmalloc in conntrack should not emit a warning, from
Pablo Neira Ayuso.
3) Fix NULL deref when rtlwifi driver is used as an AP, from Luis
Felipe Dominguez Vega.
4) Rocker doesn't free netdev on device removal, from Ido Schimmel.
5) UDP multicast early sock demux has route handling races, from Eric
Dumazet.
6) Fix L4 checksum handling in openvswitch, from Glenn Griffin.
7) Fix use-after-free in skb_set_peeked, from Herbert Xu.
8) Don't advertize NETIF_F_FRAGLIST in virtio_net driver, this can lead
to fraglists longer than the driver can support. From Jason Wang.
9) Fix mlx5 on non-4k-pagesize systems, from Carol L Soto.
10) Fix interrupt storm in bna driver, from Ivan Vecera.
11) Don't propagate -EBUSY from netlink_insert(), from Daniel Borkmann.
12) Fix inet request sock leak, from Eric Dumazet.
13) Fix TX interrupt masking and marking in TX descriptors of fs_enet
driver, from LEROY Christophe.
14) Get rid of rule optimizer in gianfar driver, it's buggy and unlikely
to get fixed any time soon. From Jakub Kicinski
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (61 commits)
cosa: missing error code on failure in probe()
gianfar: remove faulty filer optimizer
gianfar: correct list membership accounting
gianfar: correct filer table writing
bonding: Gratuitous ARP gets dropped when first slave added
net: dsa: Do not override PHY interface if already configured
net: fs_enet: mask interrupts for TX partial frames.
net: fs_enet: explicitly remove I flag on TX partial frames
inet: fix possible request socket leak
inet: fix races with reqsk timers
mkiss: Fix error handling in mkiss_open()
bnx2x: Free NVRAM lock at end of each page
bnx2x: Prevent null pointer dereference on SKB release
cxgb4: missing curly braces in t4_setup_debugfs()
net-timestamp: Update skb_complete_tx_timestamp comment
ipv6: don't reject link-local nexthop on other interface
netlink: make sure -EBUSY won't escape from netlink_insert
bna: fix interrupts storm caused by erroneous packets
net: mvpp2: replace TX coalescing interrupts with hrtimer
net: mvpp2: enable proper per-CPU TX buffers unmapping
...
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git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
Pull EDAC fix from Borislav Petkov:
"A ppc4xx_edac fix for accessing ->csrows properly. This driver was
missed during the conversion a couple of years ago"
* tag 'edac_fix_for_4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC, ppc4xx: Access mci->csrows array elements properly
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Once the module process a transfer in irq mode, the next poll transfer
will not work because the transmitter is left in inhibited state.
Fixes: 22417352f6b7f623 (Use polling mode on small transfers)
Reported-by: Edward Kigwana <ekigwana@scires.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
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This patch is based on the upstream commit 5ac1c4bcf073ad and amended
for v4.2 to make sure it works as intended.
Repeated calls to begin_crtc_commit can cause warnings like this:
[ 169.127746] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:616
[ 169.127835] in_atomic(): 0, irqs_disabled(): 1, pid: 1947, name: kms_flip
[ 169.127840] 3 locks held by kms_flip/1947:
[ 169.127843] #0: (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff814774bc>] __drm_modeset_lock_all+0x9c/0x130
[ 169.127860] #1: (crtc_ww_class_acquire){+.+.+.}, at: [<ffffffff814774cd>] __drm_modeset_lock_all+0xad/0x130
[ 169.127870] #2: (crtc_ww_class_mutex){+.+.+.}, at: [<ffffffff81477178>] drm_modeset_lock+0x38/0x110
[ 169.127879] irq event stamp: 665690
[ 169.127882] hardirqs last enabled at (665689): [<ffffffff817ffdb5>] _raw_spin_unlock_irqrestore+0x55/0x70
[ 169.127889] hardirqs last disabled at (665690): [<ffffffffc0197a23>] intel_pipe_update_start+0x113/0x5c0 [i915]
[ 169.127936] softirqs last enabled at (665470): [<ffffffff8108a766>] __do_softirq+0x236/0x650
[ 169.127942] softirqs last disabled at (665465): [<ffffffff8108ae75>] irq_exit+0xc5/0xd0
[ 169.127951] CPU: 1 PID: 1947 Comm: kms_flip Not tainted 4.1.0-rc4-patser+ #4039
[ 169.127954] Hardware name: LENOVO 2349AV8/2349AV8, BIOS G1ETA5WW (2.65 ) 04/15/2014
[ 169.127957] ffff8800c49036f0 ffff8800cde5fa28 ffffffff817f6907 0000000080000001
[ 169.127964] 0000000000000000 ffff8800cde5fa58 ffffffff810aebed 0000000000000046
[ 169.127970] ffffffff81c5d518 0000000000000268 0000000000000000 ffff8800cde5fa88
[ 169.127981] Call Trace:
[ 169.127992] [<ffffffff817f6907>] dump_stack+0x4f/0x7b
[ 169.128001] [<ffffffff810aebed>] ___might_sleep+0x16d/0x270
[ 169.128008] [<ffffffff810aed38>] __might_sleep+0x48/0x90
[ 169.128017] [<ffffffff817fc359>] mutex_lock_nested+0x29/0x410
[ 169.128073] [<ffffffffc01635f0>] ? vgpu_write64+0x220/0x220 [i915]
[ 169.128138] [<ffffffffc017fddf>] ? ironlake_update_primary_plane+0x2ff/0x410 [i915]
[ 169.128198] [<ffffffffc0190e75>] intel_frontbuffer_flush+0x25/0x70 [i915]
[ 169.128253] [<ffffffffc01831ac>] intel_finish_crtc_commit+0x4c/0x180 [i915]
[ 169.128279] [<ffffffffc00784ac>] drm_atomic_helper_commit_planes+0x12c/0x240 [drm_kms_helper]
[ 169.128338] [<ffffffffc0184264>] __intel_set_mode+0x684/0x830 [i915]
[ 169.128378] [<ffffffffc018a84a>] intel_crtc_set_config+0x49a/0x620 [i915]
[ 169.128385] [<ffffffff817fdd39>] ? mutex_unlock+0x9/0x10
[ 169.128391] [<ffffffff81467b69>] drm_mode_set_config_internal+0x69/0x120
[ 169.128398] [<ffffffff8119b547>] ? might_fault+0x57/0xb0
[ 169.128403] [<ffffffff8146bf93>] drm_mode_setcrtc+0x253/0x620
[ 169.128409] [<ffffffff8145c600>] drm_ioctl+0x1a0/0x6a0
[ 169.128415] [<ffffffff810b3b41>] ? get_parent_ip+0x11/0x50
[ 169.128424] [<ffffffff811e9ab8>] do_vfs_ioctl+0x2f8/0x530
[ 169.128429] [<ffffffff810d0fcd>] ? trace_hardirqs_on+0xd/0x10
[ 169.128435] [<ffffffff812e7676>] ? selinux_file_ioctl+0x56/0x100
[ 169.128439] [<ffffffff811e9d71>] SyS_ioctl+0x81/0xa0
[ 169.128445] [<ffffffff81800697>] system_call_fastpath+0x12/0x6f
Solve it by using the newly introduced drm_atomic_helper_commit_planes_on_crtc.
The problem here was that the drm_atomic_helper_commit_planes() helper
we were using was basically designed to do
begin_crtc_commit(crtc #1)
begin_crtc_commit(crtc #2)
...
commit all planes
finish_crtc_commit(crtc #1)
finish_crtc_commit(crtc #2)
The problem here is that since our hardware relies on vblank evasion,
our CRTC 'begin' function waits until we're out of the danger zone in
which register writes might wind up straddling the vblank, then disables
interrupts; our 'finish' function re-enables interrupts after the
registers have been written. The expectation is that the operations between
'begin' and 'end' must be performed without sleeping (since interrupts
are disabled) and should happen as quickly as possible. By clumping all
of the 'begin' calls together, we introducing a couple problems:
* Subsequent 'begin' invocations might sleep (which is illegal)
* The first 'begin' ensured that we were far enough from the vblank that
we could write our registers safely and ensure they all fell within
the same frame. Adding extra delay waiting for subsequent CRTC's
wasn't accounted for and could put us back into the 'danger zone' for
CRTC #1.
This commit solves the problem by using a new helper that allows an
order of operations like:
for each crtc {
begin_crtc_commit(crtc) // sleep (maybe), then disable interrupts
commit planes for this specific CRTC
end_crtc_commit(crtc) // reenable interrupts
}
so that sleeps will only be performed while interrupts are enabled and
we can be sure that registers for a CRTC will be written immediately
once we know we're in the safe zone.
The crtc->config->base.crtc update may seem unrelated, but the helper
will use it to obtain the crtc for the state. Without the update it
will dereference NULL and crash.
Changes since v1:
- Use Matt Roper's commit message.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=90398
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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set_config
This should be much cleaner, with the same effects.
(cherry picked for v4.2 from commit fb9d6cf8c29bfcb0b3c602f7ded87f128d730382)
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=90398
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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