openwrt/staging/blogic.git
8 years agodrm/amdgpu: make the VMID owner always 64bit
Christian König [Wed, 4 May 2016 08:20:01 +0000 (10:20 +0200)]
drm/amdgpu: make the VMID owner always 64bit

Otherwise we could (in theory) run into problems on 32bit systems.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: two minor 80 char fixes
Christian König [Tue, 3 May 2016 16:46:19 +0000 (18:46 +0200)]
drm/amdgpu: two minor 80 char fixes

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: hdp flush&inval should always do
Monk Liu [Wed, 4 May 2016 08:27:41 +0000 (16:27 +0800)]
drm/amdgpu: hdp flush&inval should always do

This fixes Tonga vm-fault issue when running disaster
(a multiple context GL heavy tests),
We should always flush & invalidate hdp no matter vm
used or not.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <David1.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
8 years agodrm/amd/amdgpu: Enable CG for UVD6 on Carrizo
Tom St Denis [Tue, 3 May 2016 14:36:28 +0000 (10:36 -0400)]
drm/amd/amdgpu:  Enable CG for UVD6 on Carrizo

Tested via vdpau/mpv.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add pipeline sync for compute job
Chunming Zhou [Wed, 27 Apr 2016 10:07:41 +0000 (18:07 +0800)]
drm/amdgpu: add pipeline sync for compute job

hardware ring is async processed, the job is executed in parallel.
In some case, this will result vm fault, like jobs with different vmids.

This works around a CPC hw issue which will eventually be fixed in fw.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: keep vm in job instead of ib (v2)
Monk Liu [Tue, 19 Apr 2016 12:11:32 +0000 (20:11 +0800)]
drm/amdgpu: keep vm in job instead of ib (v2)

ib.vm is a legacy way to get vm, after scheduler
implemented vm should be get from job, and all ibs
from one job share the same vm, no need to keep ib.vm
just move vm field to job.

this patch as well add job as paramter to ib_schedule
so it can get vm from job->vm.

v2: agd: sqaush in:
drm/amdgpu: check if ring emit_vm_flush exists in vm flush

No vm flush on engines that don't support VM.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=95195

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: make vmid owner be client_id
Chunming Zhou [Mon, 25 Apr 2016 02:23:34 +0000 (10:23 +0800)]
drm/amdgpu: make vmid owner be client_id

Using the pointer is not adequate.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add client id for every vm
Chunming Zhou [Mon, 25 Apr 2016 02:19:13 +0000 (10:19 +0800)]
drm/amdgpu: add client id for every vm

This adds a unique id for each vm client so we can
properly track them.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: fix wrong release of vmid owner
Chunming Zhou [Mon, 25 Apr 2016 02:28:24 +0000 (10:28 +0800)]
drm/amdgpu: fix wrong release of vmid owner

The release of the vmid owner was not handled
correctly.  We need to take the lock and walk
the lru list.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agoMerge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux into...
Dave Airlie [Tue, 10 May 2016 05:01:47 +0000 (15:01 +1000)]
Merge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux into drm-next

MT8173 DRM support

- device tree binding documentation for all MT8173 display
  subsystem components
- basic mediatek-drm driver for MT8173 with two optional,
  currently fixed output paths:
- DSI encoder support for DSI and (via bridge) eDP panels
- DPI encoder support for output to HDMI bridge
- necessary clock tree changes for the DPI->HDMI path
- export mtk-smi functions used by mediatek-drm

* tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux:
  clk: mediatek: remove hdmitx_dig_cts from TOP clocks
  clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output
  clk: mediatek: make dpi0_sel propagate rate changes
  drm/mediatek: Add DPI sub driver
  drm/mediatek: Add DSI sub driver
  drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.
  dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding
  memory: mtk-smi: export mtk_smi_larb_get/put

8 years agoMerge tag 'v4.6-rc7' into drm-next
Dave Airlie [Mon, 9 May 2016 03:49:56 +0000 (13:49 +1000)]
Merge tag 'v4.6-rc7' into drm-next

Merge this back as we've built up a fair few conflicts, and I have
some newer trees to pull in.

8 years agodrm/amdgpu: fix build on aarch64.
Dave Airlie [Mon, 9 May 2016 00:30:42 +0000 (10:30 +1000)]
drm/amdgpu: fix build on aarch64.

Same fix went in previously for some other files.

Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm...
Dave Airlie [Mon, 9 May 2016 00:19:38 +0000 (10:19 +1000)]
Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next

Mostly cleanups, fixes, and 'struct fence' conversion this time
around, with one reservation patch which is a-b Sumit (which the fence
conversion patches depend on).

* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (25 commits)
  drm/msm: Drop load/unload drm_driver ops
  drm/msm: Centralize connector registration/unregistration
  drm/msm/hdmi: Prevent gpio_free related kernel warnings
  drm/msm: print offender task name on hangcheck recovery
  drm/msm: fix leak in failed submit path
  drm/msm: de-indent submit_create()
  drm/msm: drop return from gpu->submit()
  drm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver
  drm/msm/edp: Drop regulator_set_voltage call
  drm/msm/dsi: Fix regulator API abuse
  drm/msm: Move call to PTR_ERR_OR_ZERO after reassignment
  drm/msm/mdp: Add support for more RGBX formats
  drm: msm: remove unused variable
  drm/msm: fix ->last_fence() after recover
  drm/msm: 'struct fence' conversion
  drm/msm: remove fence_cbs
  drm/msm: introduce msm_fence_context
  drm/msm: split locking and pinning BO's
  drm/msm/gpu: simplify tracking in-flight bo's
  drm/msm: split out timeout_to_jiffies helper
  ...

8 years agoMerge tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Mon, 9 May 2016 00:16:50 +0000 (10:16 +1000)]
Merge tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel into drm-next

Refcounting is hard, so here's a quick pull request with the one-liner to
fix up i915. Otherwise just a few other small things I picked up. Plus the
regression fix from Marten for rmfb behaviour that lingered around forever
since no testers. Feel free to cherry-pick that over to drm-fixes, but
given that there's not many who seemed to have cared, meh.

* tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Correctly refcount connectors in hw state readou
  drm/panel: Flesh out kerneldoc
  drm: Add gpu.tmpl docbook to MAINTAINERS entry
  drm/core: Do not preserve framebuffer on rmfb, v4.
  drm: Fix up markup fumble
  drm/fb_helper: Fix a few typos

8 years agoLinux 4.6-rc7
Linus Torvalds [Sun, 8 May 2016 21:38:32 +0000 (14:38 -0700)]
Linux 4.6-rc7

8 years agodrm/msm: Drop load/unload drm_driver ops
Archit Taneja [Mon, 2 May 2016 05:35:54 +0000 (11:05 +0530)]
drm/msm: Drop load/unload drm_driver ops

The load/unload drm_driver ops are deprecated. They should be removed as
they result in creation of devices visible to userspace even before
the drm_device is registered.

Drop these ops and use drm_dev_alloc/register and drm_dev_unregister/unref
to explicitly create and destroy the drm device in the msm platform
driver's bind and unbind ops. With this in use, the drm connectors are
only registered once the drm_device is registered.

It also fixes the issue of stray debugfs files after the msm module is
removed. With this, all the debugfs files are removed, and allows
successive module insertions/removals.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
8 years agodrm/msm: Centralize connector registration/unregistration
Archit Taneja [Mon, 2 May 2016 05:35:53 +0000 (11:05 +0530)]
drm/msm: Centralize connector registration/unregistration

Move the drm_connector registration from the encoder(HDMI/DSI etc) drivers
to the msm platform driver. This will simplify the task of ensuring that
the connectors are registered only after the drm_device itself is
registered.

The connectors' destroy ops are made to use kzalloc instead of
devm_kzalloc to ensure that that the connectors can be successfully
unregistered when the msm driver module is removed. The memory for the
connectors is unallocated when drm_mode_config_cleanup() is called
during either during an error or during driver remove.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/hdmi: Prevent gpio_free related kernel warnings
Archit Taneja [Mon, 2 May 2016 05:35:52 +0000 (11:05 +0530)]
drm/msm/hdmi: Prevent gpio_free related kernel warnings

Calling the legacy gpio_free on an invalid GPIO (a GPIO numbered -1)
results in kernel warnings. This causes a lot of backtraces when
we try to unload the drm/msm module.

Call gpio_free only on valid GPIOs.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: print offender task name on hangcheck recovery
Rob Clark [Tue, 3 May 2016 14:10:15 +0000 (10:10 -0400)]
drm/msm: print offender task name on hangcheck recovery

Track the pid per submit, so we can print the name of the task which
submitted the batch that caused the gpu to hang.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: fix leak in failed submit path
Rob Clark [Tue, 3 May 2016 13:50:26 +0000 (09:50 -0400)]
drm/msm: fix leak in failed submit path

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: de-indent submit_create()
Rob Clark [Tue, 3 May 2016 13:49:40 +0000 (09:49 -0400)]
drm/msm: de-indent submit_create()

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: drop return from gpu->submit()
Rob Clark [Tue, 3 May 2016 13:46:49 +0000 (09:46 -0400)]
drm/msm: drop return from gpu->submit()

At this point, there is nothing left to fail.  And submit already has a
fence assigned and is added to the submit_list.  Any problems from here
on out are asynchronous (ie. hangcheck/recovery).

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver
Archit Taneja [Fri, 29 Apr 2016 09:49:37 +0000 (15:19 +0530)]
drm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver

The MDP4 driver tries to request and set voltages for regulators required
by the DSI PLLs.

Firstly, the MDP4 driver shouldn't manage the DSI regulators, this should
be handled in the DSI driver. Secondly, it shouldn't try to set a fixed
voltage for regulators. Voltage constraints should be specified on the
regulator via DT and managed by the regulator core.

Remove all the DSI PLL regulator related code from the MDP4 driver. It's
managed in the DSI driver for MSM8960/APQ8064 already.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/edp: Drop regulator_set_voltage call
Archit Taneja [Fri, 29 Apr 2016 09:49:36 +0000 (15:19 +0530)]
drm/msm/edp: Drop regulator_set_voltage call

The eDP driver tries to set a fixed voltage for one of its regulators(vdda)
before enabling it. This shouldn't be done by the driver, the voltage
constraints should be specified on the regulator via DT and managed by
the regulator core. A driver should call regulator_set_voltage only if
it needs to change the voltage during runtime. Drop the
regulator_set_voltage call. Mention in a comment the voltage that the
regulator expects.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Fix regulator API abuse
Archit Taneja [Fri, 29 Apr 2016 09:49:35 +0000 (15:19 +0530)]
drm/msm/dsi: Fix regulator API abuse

The voltage changing code in this driver is broken and should be
removed.  The driver sets a single, exact voltage on probe.  Unless
there is a very good reason for this (which should be documented in
comments) constraints like this need to be set via the machine
constraints, voltage setting in a driver is expected to be used in cases
where the voltage varies at runtime.

In addition client drivers should almost never be calling
regulator_can_set_voltage(), if the device needs to set a voltage it
needs to set the voltage and the regulator core will handle the case
where the regulator is fixed voltage.  If the driver simply skips
setting the voltage if it doesn't have permission then it should just
not bother in the first place.

Originally authored by Mark Brown <broonie@kernel.org>

Remove the min/max voltage data entries per SoC managed by the driver.
These aren't needed as we don't try to set voltages any more. Mention in
comments the voltages that each regulator expects.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: Move call to PTR_ERR_OR_ZERO after reassignment
Vaishali Thakkar [Thu, 28 Apr 2016 13:22:49 +0000 (18:52 +0530)]
drm/msm: Move call to PTR_ERR_OR_ZERO after reassignment

Here, a location is reset to NULL before being passed to PTR_ERR.
So, PTR_ERR should be called before its argument is reassigned
to NULL. Further to simplify things use PTR_ERR_OR_ZERO instead
of PTR_ERR and IS_ERR.

Problem found using Coccinelle.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
[fixed fmt string warning (s/%ld/%d/)]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp: Add support for more RGBX formats
Rob Herring [Mon, 11 Apr 2016 23:23:51 +0000 (18:23 -0500)]
drm/msm/mdp: Add support for more RGBX formats

Android needs XBGR8888 format. Add all the missing 32-bpp formats
without alpha for completeness.

Cc: Archit Taneja <architt@codeaurora.org>
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm: msm: remove unused variable
Arnd Bergmann [Sat, 16 Apr 2016 20:41:46 +0000 (22:41 +0200)]
drm: msm: remove unused variable

A recent cleanup removed the only user of the 'kms' variable in
msm_preclose(), causing a harmless compiler warning:

drivers/gpu/drm/msm/msm_drv.c: In function 'msm_preclose':
drivers/gpu/drm/msm/msm_drv.c:468:18: error: unused variable 'kms' [-Werror=unused-variable]

This removes the variable as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4016260ba47a ("drm/msm: fix bug after preclose removal")
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: fix ->last_fence() after recover
Rob Clark [Thu, 17 Mar 2016 14:18:38 +0000 (10:18 -0400)]
drm/msm: fix ->last_fence() after recover

It is no longer true that we discard all in-flight submits on recover
(these days we only discard the first one that hung).  After the first
re-submitted batch completes it would overwrite the fence with a correct
value, but there would be a window of time which showed all re-submitted
batches as already complete.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: 'struct fence' conversion
Rob Clark [Tue, 15 Mar 2016 22:26:28 +0000 (18:26 -0400)]
drm/msm: 'struct fence' conversion

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: remove fence_cbs
Rob Clark [Wed, 16 Mar 2016 22:18:17 +0000 (18:18 -0400)]
drm/msm: remove fence_cbs

This was only used for atomic commit these days.  So instead just give
atomic it's own work-queue where we can do a block on each bo in turn.
Simplifies things a whole bunch and makes the 'struct fence' conversion
easier.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: introduce msm_fence_context
Rob Clark [Tue, 15 Mar 2016 21:22:13 +0000 (17:22 -0400)]
drm/msm: introduce msm_fence_context

Better encapsulate the per-timeline stuff into fence-context.  For now
there is just a single fence-context, but eventually we'll also have one
per-CRTC to enable fully explicit fencing.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: split locking and pinning BO's
Rob Clark [Mon, 14 Mar 2016 17:56:37 +0000 (13:56 -0400)]
drm/msm: split locking and pinning BO's

Split up locking and pinning buffers in the submit path.  This is needed
because we'll want to insert fencing in between the two steps.

This makes things end up looking more similar to etnaviv submit code
(which was originally modelled on the msm code but has already added
'struct fence' support).

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/gpu: simplify tracking in-flight bo's
Rob Clark [Wed, 16 Mar 2016 20:07:38 +0000 (16:07 -0400)]
drm/msm/gpu: simplify tracking in-flight bo's

Since we already track the array of bo's in the submit object, just
unconditionally take and drop ref's per submit (rather than only taking
ref's if bo is not already active).  This simplifies later patches.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: split out timeout_to_jiffies helper
Rob Clark [Wed, 16 Mar 2016 18:57:22 +0000 (14:57 -0400)]
drm/msm: split out timeout_to_jiffies helper

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: use imported dmabuf's reservation object
Rob Clark [Wed, 16 Mar 2016 16:40:35 +0000 (12:40 -0400)]
drm/msm: use imported dmabuf's reservation object

This was always the intention, but somehow it was never wired up
properly.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: move fence code to it's own file
Rob Clark [Tue, 15 Mar 2016 19:35:08 +0000 (15:35 -0400)]
drm/msm: move fence code to it's own file

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: move debugfs code to it's own file
Rob Clark [Wed, 16 Mar 2016 16:56:12 +0000 (12:56 -0400)]
drm/msm: move debugfs code to it's own file

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agoreservation: add reservation_object_get_excl_rcu()
Rob Clark [Thu, 31 Mar 2016 20:23:51 +0000 (16:23 -0400)]
reservation: add reservation_object_get_excl_rcu()

In the atomic modesetting path, each driver simply wants to grab a ref
to the exclusive fence from a reservation object to store in the incoming
drm_plane_state, without doing the whole RCU dance.  Since each driver
will need to do this, lets make a helper.

v2: rename to _rcu instead of _unlocked to be more consistent

Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
8 years agodrm/msm: make HDCP support optional
Rob Clark [Sun, 20 Mar 2016 14:16:29 +0000 (10:16 -0400)]
drm/msm: make HDCP support optional

It is already optional at runtime.  But this at least simplifies
backports to kernels without QCOM_SCM.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agoMerge tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:53:32 +0000 (10:53 -0700)]
Merge tag 'char-misc-4.6-rc7' of git://git./linux/kernel/git/gregkh/char-misc

Pull misc driver fixes from Gfreg KH:
 "Here are three small fixes for some driver problems that were
  reported.  Full details in the shortlog below.

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  nvmem: mxs-ocotp: fix buffer overflow in read
  Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()
  misc: mic: Fix for double fetch security bug in VOP driver

8 years agoMerge tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:50:48 +0000 (10:50 -0700)]
Merge tag 'staging-4.6-rc7' of git://git./linux/kernel/git/gregkh/staging

Pull IIO driver fixes from Grek KH:
 "It's really just IIO drivers here, some small fixes that resolve some
  'crash on boot' errors that have shown up in the -rc series, and other
  bugfixes that are required.

  All have been in linux-next with no reported problems"

* tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: imu: mpu6050: Fix name/chip_id when using ACPI
  iio: imu: mpu6050: fix possible NULL dereferences
  iio:adc:at91-sama5d2: Repair crash on module removal
  iio: ak8975: fix maybe-uninitialized warning
  iio: ak8975: Fix NULL pointer exception on early interrupt

8 years agoMerge tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 7 May 2016 17:47:03 +0000 (10:47 -0700)]
Merge tag 'usb-4.6-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some last-remaining fixes for USB drivers to resolve issues
  that have shown up in testing.  And two new device ids as well.

  All of these have been in linux-next with no reported issues"

* tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  Revert "USB / PM: Allow USB devices to remain runtime-suspended when sleeping"
  usb: musb: jz4740: fix error check of usb_get_phy()
  Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half"
  usb: musb: gadget: nuke endpoint before setting its descriptor to NULL
  USB: serial: cp210x: add Straizona Focusers device ids
  USB: serial: cp210x: add ID for Link ECU

8 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sat, 7 May 2016 15:27:35 +0000 (08:27 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "These are a number of updates to fix a few problems found in the ARM
  nommu code over the last couple of years, caused mostly by changes on
  the mmu side"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8573/1: domain: move {set,get}_domain under config guard
  ARM: 8572/1: nommu: change memory reserve for the vectors
  ARM: 8571/1: nommu: fix PMSAv7 setup

8 years agoMerge tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Sat, 7 May 2016 15:17:45 +0000 (08:17 -0700)]
Merge tag 'media/v4.6-5' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

  - deadlock fixes on driver probe at exynos4-is and s43-camif drivers

  - a build breakage if media controller is enabled and USB or PCI is
   built as module.

* tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] media-device: fix builds when USB or PCI is compiled as module
  [media] media: s3c-camif: fix deadlock on driver probe()
  [media] media: exynos4-is: fix deadlock on driver probe

8 years agoMerge branch 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Sat, 7 May 2016 15:13:42 +0000 (08:13 -0700)]
Merge branch 'for-4.6-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
 "An ahci driver addition and updates to ahci port enable handling for
  some platform devices"

* 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: add AMD Seattle platform driver
  ARM: dts: apq8064: add ahci ports-implemented mask
  ata: ahci-platform: Add ports-implemented DT bindings.
  libahci: save port map for forced port map

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 7 May 2016 15:10:08 +0000 (08:10 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fix from Doug Ledford:
 "Fix for max sector calculation in iSER"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/iser: Fix max_sectors calculation

8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 6 May 2016 20:08:35 +0000 (13:08 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull writeback fix from Jens Axboe:
 "Just a single fix for domain aware writeback, fixing a regression that
  can cause balance_dirty_pages() to keep looping while not getting any
  work done"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: Fix performance regression in wb_over_bg_thresh()

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 19:59:27 +0000 (12:59 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "This contains two fixes: a boot fix for older SGI/UV systems, and an
  APIC calibration fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
  x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init

8 years agoMerge tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 6 May 2016 18:58:45 +0000 (11:58 -0700)]
Merge tag 'pm+acpi-4.6-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "Fixes for problems introduced or discovered recently (intel_pstate,
  sti-cpufreq, ARM64 cpuidle, Operating Performance Points framework,
  generic device properties framework) and one fix for a hotplug-related
  deadlock in ACPICA that's been there forever, but is nasty enough.

  Specifics:

   - Fix for a recent regression in the intel_pstate driver causing it
     to fail to restore the HWP (HW-managed P-states) configuration of
     the boot CPU after suspend-to-RAM (Rafael Wysocki).

   - Fix for two recent regressions in the intel_pstate driver, one that
     can trigger a divide by zero if the driver is accessed via sysfs
     before it manages to take the first sample and one causing it to
     fail to update a structure field used in a trace point, so the
     information coming from it is less useful (Rafael Wysocki).

   - Fix for a problem in the sti-cpufreq driver introduced during the
     4.5 cycle that causes it to break CPU PM in multi-platform kernels
     by registering cpufreq-dt (which subsequently doesn't work)
     unconditionally and preventing the driver that would actually work
     from registering (Sudeep Holla).

   - Stable-candidate fix for an ARM64 cpuidle issue causing idle state
     usage counters to be incorrectly updated for idle states that were
     not entered due to errors (James Morse).

   - Fix for a recently introduced issue in the OPP (Operating
     Performance Points) framework causing it to print bogus error
     messages for missing optional regulators (Viresh Kumar).

   - Fix for a recently introduced issue in the generic device
     properties framework that may cause it to attempt to dereferece and
     invalid pointer in some cases (Heikki Krogerus).

   - Fix for a deadlock in the ACPICA core that may be triggered by
     device (eg Thunderbolt) hotplug (Prarit Bhargava)"

* tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Remove useless check
  ACPICA: Dispatcher: Update thread ID for recursive method calls
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
  device property: Avoid potential dereferences of invalid pointers

8 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:53:27 +0000 (11:53 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "This contains a single fix that fixes a nohz tick stopping bug when
  mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()

8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:40:24 +0000 (11:40 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "This tree contains two fixes: new Intel CPU model numbers and an
  AMD/iommu uncore PMU driver fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
  perf/x86: Add model numbers for Kabylake CPUs

8 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:33:02 +0000 (11:33 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "This tree contains three fixes: a console spam fix, a file pattern fix
  and a sysfb_efi fix for a bug that triggered on older ThinkPads"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sysfb_efi: Fix valid BAR address range check
  x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT
  MAINTAINERS: Remove asterisk from EFI directory names

8 years agoMerge branch 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 6 May 2016 18:27:05 +0000 (11:27 -0700)]
Merge branch 'parisc-4.6-5' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Patch from Dmitry V Levin to fix a kernel crash when a straced process
  calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls"

* 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

8 years agoMerge tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Fri, 6 May 2016 18:14:38 +0000 (11:14 -0700)]
Merge tag 'arc-4.6-rc7-fixes' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "Late in the cycle, but this has fixes for couple of issues: a PAE40
  boot crash and Arnd spotting lack of barriers in BE io-accessors.

  The 3rd patch for enabling highmem in low physical mem ;-) honestly is
  more than a "fix" but its been in works for some time, seems to be
  stable in testing and enables 2 of our customers to go forward with
  4.6 kernel.

   - Fix for PTE truncation in PAE40 builds
   - Fix for big endian IO accessors lacking IO barrier
   - Allow HIGHMEM to work with low physical addresses"

* tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: support HIGHMEM even without PAE40
  ARC: Fix PAE40 boot failures due to PTE truncation
  ARC: Add missing io barriers to io{read,write}{16,32}be()

8 years agoMerge tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 6 May 2016 18:05:07 +0000 (11:05 -0700)]
Merge tag 'powerpc-4.6-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "Fix bad inline asm constraint in create_zero_mask() from Anton
  Blanchard"

* tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Fix bad inline asm constraint in create_zero_mask()

8 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 6 May 2016 17:59:53 +0000 (10:59 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Fixes for i915, amdgpu/radeon and imx.

  The IMX fix is for an autoloading regression found in Fedora.  The
  radeon fixes, are the same fix to amdgpu/radeon to avoid a hardware
  lockup in some circumstances with a bad mode, and a double free bug I
  took a few hours chasing down the other morning.

  The i915 fixes are across the board, all stable material, and fixing
  some hangs and suspend/resume issues, along with a live status
  regressions"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
  drm/amdgpu: make sure vertical front porch is at least 1
  drm/radeon: make sure vertical front porch is at least 1
  drm/amdgpu: set metadata pointer to NULL after freeing.
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
  drm/i915: Fix system resume if PCI device remained enabled
  drm/i915: Avoid stalling on pending flips for legacy cursor updates

8 years agoclk: mediatek: remove hdmitx_dig_cts from TOP clocks
Philipp Zabel [Mon, 4 Jan 2016 17:36:45 +0000 (18:36 +0100)]
clk: mediatek: remove hdmitx_dig_cts from TOP clocks

The hdmitx_dig_cts clock signal is not a child of tvdpll_445p5m,
but is routed out of the HDMI PHY module.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agoclk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output
Philipp Zabel [Mon, 30 Nov 2015 21:07:53 +0000 (22:07 +0100)]
clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output

The configurable hdmi_ref output of the PLL block is derived from
the tvdpll_594m clock signal via a configurable PLL post-divider.
It is used as the PLL reference input to the HDMI PHY module.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agoclk: mediatek: make dpi0_sel propagate rate changes
Philipp Zabel [Mon, 4 Jan 2016 17:36:42 +0000 (18:36 +0100)]
clk: mediatek: make dpi0_sel propagate rate changes

This mux is supposed to select a fitting divider after the PLL
is already set to the correct rate.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agodrm/mediatek: Add DPI sub driver
Jie Qiu [Mon, 4 Jan 2016 17:36:36 +0000 (18:36 +0100)]
drm/mediatek: Add DPI sub driver

Add DPI connector/encoder to support HDMI output via the
attached HDMI bridge.

Signed-off-by: Jie Qiu <jie.qiu@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/mediatek: Add DSI sub driver
CK Hu [Mon, 4 Jan 2016 17:36:35 +0000 (18:36 +0100)]
drm/mediatek: Add DSI sub driver

This patch add a drm encoder/connector driver for the MIPI DSI function
block of the Mediatek display subsystem and a phy driver for the MIPI TX
D-PHY control module.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/mediatek: Add DRM Driver for Mediatek SoC MT8173.
CK Hu [Mon, 4 Jan 2016 17:36:34 +0000 (18:36 +0100)]
drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.

This patch adds an initial DRM driver for the Mediatek MT8173 DISP
subsystem. It currently supports two fixed output streams from the
OVL0/OVL1 sources to the DSI0/DPI0 sinks, respectively.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: YT Shen <yt.shen@mediatek.com>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: Mao Huang <littlecvr@chromium.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/i915: Correctly refcount connectors in hw state readou
Daniel Vetter [Fri, 6 May 2016 13:39:03 +0000 (15:39 +0200)]
drm/i915: Correctly refcount connectors in hw state readou

This was forgotten when adding the the refcounting to
drm_connector_state.

v2: Don't forget to unreference existing connectors. This isn't
relevant on driver load, but this code also runs on resume, and there
we already have an atomic state. Spotted by Chris Wilson.

Cc: Gabriel Feceoru <gabriel.feceoru@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Marius Vlad <marius.c.vlad@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Fixes: d2307dea14a4 ("drm/atomic: use connector references (v3)")
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462541943-19620-1-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/panel: Flesh out kerneldoc
Thierry Reding [Fri, 6 May 2016 14:01:37 +0000 (16:01 +0200)]
drm/panel: Flesh out kerneldoc

Write more complete kerneldoc comments for the DRM panel API and
integrate the helpers in the DRM DocBook reference.

Signed-off-by: Thierry Reding <treding@nvidia.com>drm/panel: Add helper for simple panel connector
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160506140137.GA4641@ulmo.ba.sec
8 years agoparisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
Dmitry V. Levin [Wed, 27 Apr 2016 01:56:11 +0000 (04:56 +0300)]
parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4fa8
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").

This bug was found by strace test suite.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agodt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding
CK Hu [Mon, 4 Jan 2016 17:36:33 +0000 (18:36 +0100)]
dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding

Add device tree binding documentation for the display subsystem in
Mediatek MT8173 SoCs.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
8 years agomemory: mtk-smi: export mtk_smi_larb_get/put
Philipp Zabel [Wed, 27 Apr 2016 08:48:00 +0000 (10:48 +0200)]
memory: mtk-smi: export mtk_smi_larb_get/put

To allow building mediatek-drm.ko as a module, the
mtk_smi_larb_get and mtk_smi_larb_put symbols have
to be exported.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agoMerge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:16:22 +0000 (13:16 +0200)]
Merge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'

* pm-opp-fixes:
  PM / OPP: Remove useless check

* pm-cpufreq-fixes:
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform

* pm-cpuidle-fixes:
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value

8 years agoMerge branches 'acpica-fixes' and 'device-properties-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:15:52 +0000 (13:15 +0200)]
Merge branches 'acpica-fixes' and 'device-properties-fixes'

* acpica-fixes:
  ACPICA: Dispatcher: Update thread ID for recursive method calls

* device-properties-fixes:
  device property: Avoid potential dereferences of invalid pointers

8 years agox86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
Chen Yu [Fri, 6 May 2016 03:33:39 +0000 (11:33 +0800)]
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO

Currently we read the tsc radio: ratio = (MSR_PLATFORM_INFO >> 8) & 0x1f;

Thus we get bit 8-12 of MSR_PLATFORM_INFO, however according to the SDM
(35.5), the ratio bits are bit 8-15.

Ignoring the upper bits can result in an incorrect tsc ratio, which causes the
TSC calibration and the Local APIC timer frequency to be incorrect.

Fix this problem by masking 0xff instead.

[ tglx: Massaged changelog ]

Fixes: 7da7c1561366 "x86, tsc: Add static (MSR) TSC calibration on Intel Atom SoCs"
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bin Gao <bin.gao@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1462505619-5516-1-git-send-email-yu.c.chen@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
8 years agoMerge branch 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu into drm-next
Dave Airlie [Fri, 6 May 2016 04:17:43 +0000 (14:17 +1000)]
Merge branch 'for-next' of git.agner.ch/git/linux-drm-fsl-dcu into drm-next

fsl-dcu pixel clock polarity support
* 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu:
  drm/fsl-dcu: use bus_flags for pixel clock polarity
  drm: introduce bus_flags in drm_display_info

8 years agoMerge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 6 May 2016 04:17:22 +0000 (14:17 +1000)]
Merge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm-next

This is the first big radeon/amdgpu pull request for 4.7.  Highlights:
    - Polaris support in amdgpu
      Current display stack on par with other asics, for advanced features DAL is required
      Power management support
      Support for GFX, Compute, SDMA, UVD, VCE
    - VCE and UVD init/fini cleanup in radeon
    - GPUVM improvements
    - Scheduler improvements
    - Clockgating improvements
    - Powerplay improvements
    - TTM changes to support driver specific LRU update mechanism
    - Radeon support for new Mesa features
    - ASYNC pageflip support for radeon
    - Lots of bug fixes and code cleanups

* 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux: (180 commits)
  drm/amdgpu: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
  drm/amdgpu: use drm_mode_vrefresh() rather than mode->vrefresh
  drm/amdgpu/uvd6: add bypass support for fiji (v3)
  drm/amdgpu/fiji: set UVD CG state when enabling UVD DPM (v2)
  drm/powerplay: add missing clockgating callback for tonga
  drm/amdgpu: Constify some tables
  drm/amd/powerplay: Delete dead struct declaration
  drm/amd/powerplay/hwmgr: don't add invalid voltage
  drm/amd/powerplay/hwmgr: prevent VDDC from exceeding 2V
  MAINTAINERS: Remove unneded wildcard for the Radeon/AMDGPU drivers
  drm/radeon: add cayman VM support for append packet.
  drm/amd/amdgpu: Add debugfs entries for smc/didt/pcie
  drm/amd/amdgpu: Drop print_status callbacks.
  drm/amd/powerplay: revise reading/writing pptable on Polaris10
  drm/amd/powerplay: revise reading/writing pptable on Tonga
  drm/amd/powerplay: revise reading/writing pptable on Fiji
  drm/amd/powerplay: revise caching the soft pptable and add it's size
  drm/amd/powerplay: add dpm force multiple levels on cz/tonga/fiji/polaris (v2)
  drm/amd/powerplay: fix fan speed percent setting error on Polaris10
  drm/amd/powerplay: fix bug dpm can't work when resume back on Polaris
  ...

8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Fri, 6 May 2016 03:48:35 +0000 (20:48 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "14 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  byteswap: try to avoid __builtin_constant_p gcc bug
  lib/stackdepot: avoid to return 0 handle
  mm: fix kcompactd hang during memory offlining
  modpost: fix module autoloading for OF devices with generic compatible property
  proc: prevent accessing /proc/<PID>/environ until it's ready
  mm/zswap: provide unique zpool name
  mm: thp: kvm: fix memory corruption in KVM with THP enabled
  MAINTAINERS: fix Rajendra Nayak's address
  mm, cma: prevent nr_isolated_* counters from going negative
  mm: update min_free_kbytes from khugepaged after core initialization
  huge pagecache: mmap_sem is unlocked when truncation splits pmd
  rapidio/mport_cdev: fix uapi type definitions
  mm: memcontrol: let v2 cgroups follow changes in system swappiness
  mm: thp: correct split_huge_pages file permission

8 years agomailmap: add John Paul Adrian Glaubitz
Linus Torvalds [Fri, 6 May 2016 03:07:14 +0000 (20:07 -0700)]
mailmap: add John Paul Adrian Glaubitz

Apparently patchwork ended up truncating the full name.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Fri, 6 May 2016 01:10:01 +0000 (18:10 -0700)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - a fix for the persistent memory 'struct page' driver.  The
   implementation overlooked the fact that pages are allocated in 2MB
   units leading to -ENOMEM when establishing some configurations.

   It's tagged for -stable as the problem was introduced with the
   initial implementation in 4.5.

 - The new "error status translation" routine, introduced with the 4.6
   updates to the nfit driver, missed a necessary path in
   acpi_nfit_ctl().

   The end result is that we are falsely assuming commands complete
   successfully when the embedded status says otherwise.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nfit: fix translation of command status results
  libnvdimm, pfn: fix memmap reservation sizing

8 years agobyteswap: try to avoid __builtin_constant_p gcc bug
Arnd Bergmann [Thu, 5 May 2016 23:22:39 +0000 (16:22 -0700)]
byteswap: try to avoid __builtin_constant_p gcc bug

This is another attempt to avoid a regression in wwn_to_u64() after that
started using get_unaligned_be64(), which in turn ran into a bug on
gcc-4.9 through 6.1.

The regression got introduced due to the combination of two separate
workarounds (commits e3bde9568d99: "include/linux/unaligned: force
inlining of byteswap operations" and ef3fb2422ffe: "scsi: fc: use
get/put_unaligned64 for wwn access") that each try to sidestep distinct
problems with gcc behavior (code growth and increased stack usage).

Unfortunately after both have been applied, a more serious gcc bug has
been uncovered, leading to incorrect object code that discards part of a
function and causes undefined behavior.

As part of this problem is how __builtin_constant_p gets evaluated on an
argument passed by reference into an inline function, this avoids the
use of __builtin_constant_p() for all architectures that set
CONFIG_ARCH_USE_BUILTIN_BSWAP.  Most architectures do not set
ARCH_SUPPORTS_OPTIMIZED_INLINING, which means they probably do not
suffer from the problem in the qla2xxx driver, but they might still run
into it elsewhere.

Both of the original workarounds were only merged in the 4.6 kernel, and
the bug that is fixed by this patch should only appear if both are
there, so we probably don't need to backport the fix.  On the other
hand, it works by simplifying the code path and should not have any
negative effects.

[arnd@arndb.de: fix older gcc warnings]
  (http://lkml.kernel.org/r/12243652.bxSxEgjgfk@wuerfel)
Link: https://lkml.org/lkml/headers/2016/4/12/1103
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70232
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70646
Fixes: e3bde9568d99 ("include/linux/unaligned: force inlining of byteswap operations")
Fixes: ef3fb2422ffe ("scsi: fc: use get/put_unaligned64 for wwn access")
Link: http://lkml.kernel.org/r/1780465.XdtPJpi8Tt@wuerfel
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Josh Poimboeuf <jpoimboe@redhat.com> # on gcc-5.3
Tested-by: Quinn Tran <quinn.tran@qlogic.com>
Cc: Martin Jambor <mjambor@suse.cz>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Jan Hubicka <hubicka@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agolib/stackdepot: avoid to return 0 handle
Joonsoo Kim [Thu, 5 May 2016 23:22:35 +0000 (16:22 -0700)]
lib/stackdepot: avoid to return 0 handle

Recently, we allow to save the stacktrace whose hashed value is 0.  It
causes the problem that stackdepot could return 0 even if in success.
User of stackdepot cannot distinguish whether it is success or not so we
need to solve this problem.  In this patch, 1 bit are added to handle
and make valid handle none 0 by setting this bit.  After that, valid
handle will not be 0 and 0 handle will represent failure correctly.

Fixes: 33334e25769c ("lib/stackdepot.c: allow the stack trace hash to be zero")
Link: http://lkml.kernel.org/r/1462252403-1106-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: fix kcompactd hang during memory offlining
Vlastimil Babka [Thu, 5 May 2016 23:22:32 +0000 (16:22 -0700)]
mm: fix kcompactd hang during memory offlining

Assume memory47 is the last online block left in node1.  This will hang:

  # echo offline > /sys/devices/system/node/node1/memory47/state

After a couple of minutes, the following pops up in dmesg:

  INFO: task bash:957 blocked for more than 120 seconds.
         Not tainted 4.6.0-rc6+ #6
  "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  bash            D ffff8800b7adbaf8     0   957    951 0x00000000
  Call Trace:
    schedule+0x35/0x80
    schedule_timeout+0x1ac/0x270
    wait_for_completion+0xe1/0x120
    kthread_stop+0x4f/0x110
    kcompactd_stop+0x26/0x40
    __offline_pages.constprop.28+0x7e6/0x840
    offline_pages+0x11/0x20
    memory_block_action+0x73/0x1d0
    memory_subsys_offline+0x47/0x60
    device_offline+0x86/0xb0
    store_mem_state+0xda/0xf0
    dev_attr_store+0x18/0x30
    sysfs_kf_write+0x37/0x40
    kernfs_fop_write+0x11d/0x170
    __vfs_write+0x37/0x120
    vfs_write+0xa9/0x1a0
    SyS_write+0x55/0xc0
    entry_SYSCALL_64_fastpath+0x1a/0xa4

kcompactd is waiting for kcompactd_max_order > 0 when it's woken up to
actually exit.  Check kthread_should_stop() to break out of the wait.

Fixes: 698b1b306 ("mm, compaction: introduce kcompactd").
Reported-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Tested-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomodpost: fix module autoloading for OF devices with generic compatible property
Philipp Zabel [Thu, 5 May 2016 23:22:29 +0000 (16:22 -0700)]
modpost: fix module autoloading for OF devices with generic compatible property

Since the wildcard at the end of OF module aliases is gone, autoloading
of modules that don't match a device's last (most generic) compatible
value fails.

For example the CODA960 VPU on i.MX6Q has the SoC specific compatible
"fsl,imx6q-vpu" and the generic compatible "cnm,coda960".  Since the
driver currently only works with knowledge about the SoC specific
integration, it doesn't list "cnm,cod960" in the module device table.

This results in the device compatible
"of:NvpuT<NULL>Cfsl,imx6q-vpuCcnm,coda960" not matching the module alias
"of:N*T*Cfsl,imx6q-vpu" anymore, whereas before commit 2f632369ab79
("modpost: don't add a trailing wildcard for OF module aliases") it
matched the module alias "of:N*T*Cfsl,imx6q-vpu*".

This patch adds two module aliases for each compatible, one without the
wildcard and one with "C*" appended.

  $ modinfo coda | grep imx6q
  alias:          of:N*T*Cfsl,imx6q-vpuC*
  alias:          of:N*T*Cfsl,imx6q-vpu

Fixes: 2f632369ab79 ("modpost: don't add a trailing wildcard for OF module aliases")
Link: http://lkml.kernel.org/r/1462203339-15340-1-git-send-email-p.zabel@pengutronix.de
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoproc: prevent accessing /proc/<PID>/environ until it's ready
Mathias Krause [Thu, 5 May 2016 23:22:26 +0000 (16:22 -0700)]
proc: prevent accessing /proc/<PID>/environ until it's ready

If /proc/<PID>/environ gets read before the envp[] array is fully set up
in create_{aout,elf,elf_fdpic,flat}_tables(), we might end up trying to
read more bytes than are actually written, as env_start will already be
set but env_end will still be zero, making the range calculation
underflow, allowing to read beyond the end of what has been written.

Fix this as it is done for /proc/<PID>/cmdline by testing env_end for
zero.  It is, apparently, intentionally set last in create_*_tables().

This bug was found by the PaX size_overflow plugin that detected the
arithmetic underflow of 'this_len = env_end - (env_start + src)' when
env_end is still zero.

The expected consequence is that userland trying to access
/proc/<PID>/environ of a not yet fully set up process may get
inconsistent data as we're in the middle of copying in the environment
variables.

Fixes: https://forums.grsecurity.net/viewtopic.php?f=3&t=4363
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=116461
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: Pax Team <pageexec@freemail.hu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Mateusz Guzik <mguzik@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/zswap: provide unique zpool name
Dan Streetman [Thu, 5 May 2016 23:22:23 +0000 (16:22 -0700)]
mm/zswap: provide unique zpool name

Instead of using "zswap" as the name for all zpools created, add an
atomic counter and use "zswap%x" with the counter number for each zpool
created, to provide a unique name for each new zpool.

As zsmalloc, one of the zpool implementations, requires/expects a unique
name for each pool created, zswap should provide a unique name.  The
zsmalloc pool creation does not fail if a new pool with a conflicting
name is created, unless CONFIG_ZSMALLOC_STAT is enabled; in that case,
zsmalloc pool creation fails with -ENOMEM.  Then zswap will be unable to
change its compressor parameter if its zpool is zsmalloc; it also will
be unable to change its zpool parameter back to zsmalloc, if it has any
existing old zpool using zsmalloc with page(s) in it.  Attempts to
change the parameters will result in failure to create the zpool.  This
changes zswap to provide a unique name for each zpool creation.

Fixes: f1c54846ee45 ("zswap: dynamic pool creation")
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <dan.streetman@canonical.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: thp: kvm: fix memory corruption in KVM with THP enabled
Andrea Arcangeli [Thu, 5 May 2016 23:22:20 +0000 (16:22 -0700)]
mm: thp: kvm: fix memory corruption in KVM with THP enabled

After the THP refcounting change, obtaining a compound pages from
get_user_pages() no longer allows us to assume the entire compound page
is immediately mappable from a secondary MMU.

A secondary MMU doesn't want to call get_user_pages() more than once for
each compound page, in order to know if it can map the whole compound
page.  So a secondary MMU needs to know from a single get_user_pages()
invocation when it can map immediately the entire compound page to avoid
a flood of unnecessary secondary MMU faults and spurious
atomic_inc()/atomic_dec() (pages don't have to be pinned by MMU notifier
users).

Ideally instead of the page->_mapcount < 1 check, get_user_pages()
should return the granularity of the "page" mapping in the "mm" passed
to get_user_pages().  However it's non trivial change to pass the "pmd"
status belonging to the "mm" walked by get_user_pages up the stack (up
to the caller of get_user_pages).  So the fix just checks if there is
not a single pte mapping on the page returned by get_user_pages, and in
turn if the caller can assume that the whole compound page is mapped in
the current "mm" (in a pmd_trans_huge()).  In such case the entire
compound page is safe to map into the secondary MMU without additional
get_user_pages() calls on the surrounding tail/head pages.  In addition
of being faster, not having to run other get_user_pages() calls also
reduces the memory footprint of the secondary MMU fault in case the pmd
split happened as result of memory pressure.

Without this fix after a MADV_DONTNEED (like invoked by QEMU during
postcopy live migration or balloning) or after generic swapping (with a
failure in split_huge_page() that would only result in pmd splitting and
not a physical page split), KVM would map the whole compound page into
the shadow pagetables, despite regular faults or userfaults (like
UFFDIO_COPY) may map regular pages into the primary MMU as result of the
pte faults, leading to the guest mode and userland mode going out of
sync and not working on the same memory at all times.

Any other secondary MMU notifier manager (KVM is just one of the many
MMU notifier users) will need the same information if it doesn't want to
run a flood of get_user_pages_fast and it can support multiple
granularity in the secondary MMU mappings, so I think it is justified to
be exposed not just to KVM.

The other option would be to move transparent_hugepage_adjust to
mm/huge_memory.c but that currently has all kind of KVM data structures
in it, so it's definitely not a cut-and-paste work, so I couldn't do a
fix as cleaner as this one for 4.6.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: "Li, Liang Z" <liang.z.li@intel.com>
Cc: Amit Shah <amit.shah@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMAINTAINERS: fix Rajendra Nayak's address
Eric Engestrom [Thu, 5 May 2016 23:22:17 +0000 (16:22 -0700)]
MAINTAINERS: fix Rajendra Nayak's address

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Cc: Rajendra Nayak <rnayak@codeaurora.org>
Cc: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, cma: prevent nr_isolated_* counters from going negative
Hugh Dickins [Thu, 5 May 2016 23:22:15 +0000 (16:22 -0700)]
mm, cma: prevent nr_isolated_* counters from going negative

/proc/sys/vm/stat_refresh warns nr_isolated_anon and nr_isolated_file go
increasingly negative under compaction: which would add delay when
should be none, or no delay when should delay.  The bug in compaction
was due to a recent mmotm patch, but much older instance of the bug was
also noticed in isolate_migratepages_range() which is used for CMA and
gigantic hugepage allocations.

The bug is caused by putback_movable_pages() in an error path
decrementing the isolated counters without them being previously
incremented by acct_isolated().  Fix isolate_migratepages_range() by
removing the error-path putback, thus reaching acct_isolated() with
migratepages still isolated, and leaving putback to caller like most
other places do.

Fixes: edc2ca612496 ("mm, compaction: move pageblock checks up from isolate_migratepages_range()")
[vbabka@suse.cz: expanded the changelog]
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: update min_free_kbytes from khugepaged after core initialization
Jason Baron [Thu, 5 May 2016 23:22:12 +0000 (16:22 -0700)]
mm: update min_free_kbytes from khugepaged after core initialization

Khugepaged attempts to raise min_free_kbytes if its set too low.
However, on boot khugepaged sets min_free_kbytes first from
subsys_initcall(), and then the mm 'core' over-rides min_free_kbytes
after from init_per_zone_wmark_min(), via a module_init() call.

Khugepaged used to use a late_initcall() to set min_free_kbytes (such
that it occurred after the core initialization), however this was
removed when the initialization of min_free_kbytes was integrated into
the starting of the khugepaged thread.

The fix here is simply to invoke the core initialization using a
core_initcall() instead of module_init(), such that the previous
initialization ordering is restored.  I didn't restore the
late_initcall() since start_stop_khugepaged() already sets
min_free_kbytes via set_recommended_min_free_kbytes().

This was noticed when we had a number of page allocation failures when
moving a workload to a kernel with this new initialization ordering.  On
an 8GB system this restores min_free_kbytes back to 67584 from 11365
when CONFIG_TRANSPARENT_HUGEPAGE=y is set and either
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y or
CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y.

Fixes: 79553da293d3 ("thp: cleanup khugepaged startup")
Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agohuge pagecache: mmap_sem is unlocked when truncation splits pmd
Hugh Dickins [Thu, 5 May 2016 23:22:09 +0000 (16:22 -0700)]
huge pagecache: mmap_sem is unlocked when truncation splits pmd

zap_pmd_range()'s CONFIG_DEBUG_VM !rwsem_is_locked(&mmap_sem) BUG() will
be invalid with huge pagecache, in whatever way it is implemented:
truncation of a hugely-mapped file to an unhugely-aligned size would
easily hit it.

(Although anon THP could in principle apply khugepaged to private file
mappings, which are not excluded by the MADV_HUGEPAGE restrictions, in
practice there's a vm_ops check which excludes them, so it never hits
this BUG() - there's no interface to "truncate" an anonymous mapping.)

We could complicate the test, to check i_mmap_rwsem also when there's a
vm_file; but my inclination was to make zap_pmd_range() more readable by
simply deleting this check.  A search has shown no report of the issue
in the years since commit e0897d75f0b2 ("mm, thp: print useful
information when mmap_sem is unlocked in zap_pmd_range") expanded it
from VM_BUG_ON() - though I cannot point to what commit I would say then
fixed the issue.

But there are a couple of other patches now floating around, neither yet
in the tree: let's agree to retain the check as a VM_BUG_ON_VMA(), as
Matthew Wilcox has done; but subject to a vma_is_anonymous() check, as
Kirill Shutemov has done.  And let's get this in, without waiting for
any particular huge pagecache implementation to reach the tree.

Matthew said "We can reproduce this BUG() in the current Linus tree with
DAX PMDs".

Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Matthew Wilcox <willy@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Yang Shi <yang.shi@linaro.org>
Cc: Ning Qu <quning@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agorapidio/mport_cdev: fix uapi type definitions
Alexandre Bounine [Thu, 5 May 2016 23:22:06 +0000 (16:22 -0700)]
rapidio/mport_cdev: fix uapi type definitions

Fix problems in uapi definitions reported by Gabriel Laskar: (see
https://lkml.org/lkml/2016/4/5/205 for details)

 - move public header file rio_mport_cdev.h to include/uapi/linux directory
 - change types in data structures passed as IOCTL parameters
 - improve parameter checking in some IOCTL service routines

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Reported-by: Gabriel Laskar <gabriel@lse.epita.fr>
Tested-by: Barry Wood <barry.wood@idt.com>
Cc: Gabriel Laskar <gabriel@lse.epita.fr>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: memcontrol: let v2 cgroups follow changes in system swappiness
Johannes Weiner [Thu, 5 May 2016 23:22:03 +0000 (16:22 -0700)]
mm: memcontrol: let v2 cgroups follow changes in system swappiness

Cgroup2 currently doesn't have a per-cgroup swappiness setting.  We
might want to add one later - that's a different discussion - but until
we do, the cgroups should always follow the system setting.  Otherwise
it will be unchangeably set to whatever the ancestor inherited from the
system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: <stable@vger.kernel.org> [4.5]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: thp: correct split_huge_pages file permission
Yang Shi [Thu, 5 May 2016 23:22:00 +0000 (16:22 -0700)]
mm: thp: correct split_huge_pages file permission

split_huge_pages doesn't support get method at all, so the read
permission sounds confusing, change the permission to write only.

And, add "\n" to the output of set method to make it more readable.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...
Linus Torvalds [Thu, 5 May 2016 22:40:38 +0000 (15:40 -0700)]
Merge tag 'asm-generic-4.6' of git://git./linux/kernel/git/arnd/asm-generic

Pull asm-generic syscall fix from Arnd Bergmann:
 "My last pull request for asm-generic had just one patch that added two
  new system calls to asm/unistd.h, but unfortunately it turned out to
  be wrong, pointing arch/tile compat mode at the native handlers rather
  than the compat ones.

  This was spotted by Yury Norov, who is working on ILP32 mode for
  arch/arm64, which would have the same problem when merged.  This fixes
  the table to use the correct compat syscalls, like the other 64-bit
  architectures do.

  I'll try to find the time to come up with a solution that prevents
  this problem from happening again, by allowing all future system calls
  to just get added in a single file for use by all architectures"

* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: use compat version for preadv2 and pwritev2

8 years agoMerge tag 'iio-fixes-for-4.6d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
Greg Kroah-Hartman [Thu, 5 May 2016 22:38:07 +0000 (15:38 -0700)]
Merge tag 'iio-fixes-for-4.6d' of git://git./linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Fourth set of IIO fixes for the 4.6 cycle.

This last minute set is concerned with a regression in the mpu6050 driver.
The regression causes a null pointer dereference on any ACPI device
that has one of these present such as the ASUS T100TA Baytrail/T.

The issue was known but thought (i.e. missunderstood by me)
to only be a possible with no reports, so was routed via the normal merge
window.  Turns out this was wrong (thanks to Alan for reporting the crash).

The pull is just for the null dereference fix and a followup fix
that also stops the reported name of the device being NULL.

* mpu6050
  - Fix a 'possible' NULL dereference introduced as part of splitting the
  driver to allow both i2c and spi to be supported.  The issue affects ACPI
  systems with this device.
  - Fix a follow up issue where the name and chip id both get set to null if
  the device driver instance is instantiated from ACPI tables.

8 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Thu, 5 May 2016 22:31:35 +0000 (15:31 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Here are a couple last-minute fixes for ARM SoCs.  Most of them are
  for the OMAP platforms, the rest are all for different platforms.

  OMAP:
     All dts fixes, mostly affecting voltages and pinctrl for various
     device drivers:

      - Regulator minimum voltage fixes for omap5
      - ISP syscon register offset fix for omap3
      - Fix regulator initial modes for n900
      - Fix omap5 pinctrl wkup instance size

  Allwinner:
     Remove incorrect constraints from a dcdc1 regulator

  Alltera SoCFPGA:
     Fix compilation in thumb2 mode

  Samsung exynos:
     Fix a potential oops in the pm-domain error handling

  Davinci:
     Avoid a link error if NVMEM is disabled

  Renesas:
     Do not mark an external uart clock as disabled, to allow probing
     the uarts"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: davinci: only use NVMEM when available
  ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel
  ARM: dts: omap5: fix range of permitted wakeup pinmux registers
  ARM: dts: omap3-n900: Specify peripherals LDO regulators initial mode
  ARM: dts: omap3: Fix ISP syscon register offset
  ARM: dts: omap5-cm-t54: fix ldo1_reg and ldo4_reg ranges
  ARM: dts: omap5-board-common: fix ldo1_reg and ldo4_reg ranges
  arm64: dts: r8a7795: Don't disable referenced optional scif clock
  ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
  ARM: dts: sun8i-q8-common: Do not set constraints on dc1sw regulator

8 years agomaintainers: update rmk's email address(es)
Russell King [Thu, 5 May 2016 16:12:54 +0000 (17:12 +0100)]
maintainers: update rmk's email address(es)

Update my email and web addresses in the kernel maintainers file.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agowriteback: Fix performance regression in wb_over_bg_thresh()
Howard Cochran [Thu, 10 Mar 2016 06:12:39 +0000 (01:12 -0500)]
writeback: Fix performance regression in wb_over_bg_thresh()

Commit 947e9762a8dd ("writeback: update wb_over_bg_thresh() to use
wb_domain aware operations") unintentionally changed this function's
meaning from "are there more dirty pages than the background writeback
threshold" to "are there more dirty pages than the writeback threshold".
The background writeback threshold is typically half of the writeback
threshold, so this had the effect of raising the number of dirty pages
required to cause a writeback worker to perform background writeout.

This can cause a very severe performance regression when a BDI uses
BDI_CAP_STRICTLIMIT because balance_dirty_pages() and the writeback worker
can now disagree on whether writeback should be initiated.

For example, in a system having 1GB of RAM, a single spinning disk, and a
"pass-through" FUSE filesystem mounted over the disk, application code
mmapped a 128MB file on the disk and was randomly dirtying pages in that
mapping.

Because FUSE uses strictlimit and has a default max_ratio of only 1%, in
balance_dirty_pages, thresh is ~200, bg_thresh is ~100, and the
dirty_freerun_ceiling is the average of those, ~150. So, it pauses the
dirtying processes when we have 151 dirty pages and wakes up a background
writeback worker. But the worker tests the wrong threshold (200 instead of
100), so it does not initiate writeback and just returns.

Thus, balance_dirty_pages keeps looping, sleeping and then waking up the
worker who will do nothing. It remains stuck in this state until the few
dirty pages that we have finally expire and we write them back for that
reason. Then the whole process repeats, resulting in near-zero throughput
through the FUSE BDI.

The fix is to call the parameterized variant of wb_calc_thresh, so that the
worker will do writeback if the bg_thresh is exceeded which was the
behavior before the referenced commit.

Fixes: 947e9762a8dd ("writeback: update wb_over_bg_thresh() to use wb_domain aware operations")
Signed-off-by: Howard Cochran <hcochran@kernelspring.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # v4.2+
Tested-by Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
8 years agoARM: 8573/1: domain: move {set,get}_domain under config guard
Vladimir Murzin [Wed, 4 May 2016 09:39:02 +0000 (10:39 +0100)]
ARM: 8573/1: domain: move {set,get}_domain under config guard

Recursive undefined instrcution falut is seen with R-class taking an
exception. The reson for that is __show_regs() tries to get domain
information, but domains is not available on !MMU cores, like R/M
class.

Fix it by puting {set,get}_domain functions under CONFIG_CPU_CP15_MMU
guard and providing stubs for the case where domains is not supported.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: 8572/1: nommu: change memory reserve for the vectors
Jean-Philippe Brucker [Wed, 4 May 2016 09:38:12 +0000 (10:38 +0100)]
ARM: 8572/1: nommu: change memory reserve for the vectors

Commit 19accfd3 (ARM: move vector stubs) moved the vector stubs in an
additional page above the base vector one. This change wasn't taken into
account by the nommu memreserve.
This patch ensures that the kernel won't overwrite any vector stub on
nommu.

[changed the MPU side too]

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: 8571/1: nommu: fix PMSAv7 setup
Jean-Philippe Brucker [Wed, 4 May 2016 09:37:22 +0000 (10:37 +0100)]
ARM: 8571/1: nommu: fix PMSAv7 setup

Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) broke the support for
MPU on ARMv7-R. This patch adapts the code inside CONFIG_ARM_MPU to use
memblocks appropriately.

MPU initialisation only uses the first memory region, and removes all
subsequent ones. Because looping over all regions that need removal is
inefficient, and memblock_remove already handles memory ranges, we can
flatten the 'for_each_memblock' part.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agodrm/fsl-dcu: use bus_flags for pixel clock polarity
Stefan Agner [Mon, 8 Feb 2016 20:50:13 +0000 (12:50 -0800)]
drm/fsl-dcu: use bus_flags for pixel clock polarity

The drivers current default configuration drives the pixel data
on rising edge of the pixel clock. However, most display sample
data on rising edge... This leads to color shift artefacts visible
especially at edges.

This patch changes the relevant defines to be useful and actually
set the bits, and changes pixel clock polarity to drive the pixel
data on falling edge by default. The patch also adds an explicit
pixel clock polarity flag to the display introduced with the driver
(NEC WQVGA "nec,nl4827hc19-05b") using the new bus_flags field to
retain the initial behavior.

Signed-off-by: Stefan Agner <stefan@agner.ch>
8 years agodrm: introduce bus_flags in drm_display_info
Stefan Agner [Mon, 8 Feb 2016 19:38:14 +0000 (11:38 -0800)]
drm: introduce bus_flags in drm_display_info

Introduce bus_flags to specify display bus properties like signal
polarities. This is useful for parallel display buses, e.g. to
specify the pixel clock or data enable polarity.

Suggested-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Stefan Agner <stefan@agner.ch>