Pull scheduler fix from Ingo Molnar:
 "Fix a NULL pointer dereference crash in certain environments"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Do not re-read ->h_load_next during hierarchical load calculation

Pull perf fixes from Ingo Molnar:
 "Six kernel side fixes: three related to NMI handling on AMD systems, a
  race fix, a kexec initialization fix and a PEBS sampling fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix perf_event_disable_inatomic() race
  x86/perf/amd: Remove need to check "running" bit in NMI handler
  x86/perf/amd: Resolve NMI latency issues for active PMCs
  x86/perf/amd: Resolve race condition when disabling PMC
  perf/x86/intel: Initialize TFA MSR
  perf/x86/intel: Fix handling of wakeup_events for multi-entry PEBS

Pull locking fix from Ingo Molnar:
 "Fixes a crash when accessing /proc/lockdep"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/lockdep: Zap lock classes even with lock debugging disabled

Pull irq fixes from Ingo Molnar:
 "Two genirq fixes, plus an irqchip driver error handling fix"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Respect IRQCHIP_SKIP_SET_WAKE in irq_chip_set_wake_parent()
  genirq: Initialize request_mutex if CONFIG_SPARSE_IRQ=n
  irqchip/irq-ls1x: Missing error code in ls1x_intc_of_init()

Pull core fixes from Ingo Molnar:
 "Fix an objtool warning plus fix a u64_to_user_ptr() macro expansion
  bug"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Add rewind_stack_do_exit() to the noreturn list
  linux/kernel.h: Use parentheses around argument in u64_to_user_ptr()

Pull dma-mapping fixes from Christoph Hellwig:
 "Fix a sparc64 sun4v_pci regression introduced in this merged window,
  and a dma-debug stracktrace regression from the big refactor last
  merge window"

* tag 'dma-mapping-5.1-1' of git://git.infradead.org/users/hch/dma-mapping:
  dma-debug: only skip one stackframe entry
  sparc64/pci_sun4v: fix ATU checks for large DMA masks

Pull IOMMU fix from Joerg Roedel:
 "Fix an AMD IOMMU issue where the driver didn't correctly setup the
  exclusion range in the hardware registers, resulting in exclusion
  ranges being one page too big.

  This can cause data corruption of the address of that last page is
  used by DMA operations"

* tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Set exclusion range correctly

Pull clang-format update from Miguel Ojeda:
 "The usual roughly-per-release .clang-format macro list update"

* tag 'clang-format-for-linus-v5.1-rc5' of git://github.com/ojeda/linux:
  clang-format: Update with the latest for_each macro list

Pull MMC host fixes from Ulf Hansson:

 - alcor: Stabilize data write requests

 - sdhci-omap: Fix command error path during tuning

* tag 'mmc-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning
  mmc: alcor: don't write data before command has completed

Pull sound fixes from Takashi Iwai:
 "Well, this one became unpleasantly larger than previous pull requests,
  but it's a kind of usual pattern: now it contains a collection of ASoC
  fixes, and nothing to worry too much.

  The fixes for ASoC core (DAPM, DPCM, topology) are all small and just
  covering corner cases. The rest changes are driver-specific, many of
  which are for x86 platforms and new drivers like STM32, in addition to
  the usual fixups for HD-audio"

* tag 'sound-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (66 commits)
  ASoC: wcd9335: Fix missing regmap requirement
  ALSA: hda: Fix racy display power access
  ASoC: pcm: fix error handling when try_module_get() fails.
  ASoC: stm32: sai: fix master clock management
  ASoC: Intel: kbl: fix wrong number of channels
  ALSA: hda - Add two more machines to the power_save_blacklist
  ASoC: pcm: update module refcount if module_get_upon_open is set
  ASoC: core: conditionally increase module refcount on component open
  ASoC: stm32: fix sai driver name initialisation
  ASoC: topology: Use the correct dobj to free enum control values and texts
  ALSA: seq: Fix OOB-reads from strlcpy
  ASoC: intel: skylake: add remove() callback for component driver
  ASoC: cs35l35: Disable regulators on driver removal
  ALSA: xen-front: Do not use stream buffer size before it is set
  ASoC: rockchip: pdm: change dma burst to 8
  ASoC: rockchip: pdm: fix regmap_ops hang issue
  ASoC: simple-card: don't select DPCM via simple-audio-card
  ASoC: audio-graph-card: don't select DPCM via audio-graph-card
  ASoC: tlv320aic32x4: Change author's name
  ALSA: hda/realtek - Add quirk for Tuxedo XC 1509
  ...

Pull ACPI fix from Rafael Wysocki:
 "Fix an ACPICA issue introduced during the 4.20 development cycle and
  causing some systems to crash because of leftover operation region
  data still maintained after the operation region in question has gone
  away (Erik Schmauss)"

* tag 'acpi-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Namespace: remove address node from global list after method termination

Pull drm fixes from Dave Airlie:
 "Fixes across the driver spectrum this week, the mediatek fbdev support
  might be a bit late for this round, but I looked over it and it's not
  very large and seems like a useful feature for them.

  Otherwise the main thing is a regression fix for i915 5.0 bug that
  caused black screens on a bunch of Dell XPS 15s I think, I know at
  least Fedora is waiting for this to land, and the udl fix is also for
  a regression since 5.0 where unplugging the device would end badly.

  core:
   - make atomic hooks optional

  i915:
   - Revert a 5.0 regression where some eDP panels stopped working
   - DSI related fixes for platforms up to IceLake
   - GVT (regression fix, warning fix, use-after free fix)

  amdgpu:
   - Cursor fixes
   - missing PCI ID fix for KFD
   - XGMI fix
   - shadow buffer handling after reset fix

  udl:
   - fix unplugging device crashes.

  mediatek:
   - stabilise MT2701 HDMI support
   - fbdev support

  tegra:
   - fix for build regression in rc1.

  sun4i:
   - Allwinner A6 max freq improvements
   - null ptr deref fix

  dw-hdmi:
   - SCDC configuration improvements

  omap:
   - CEC clock management policy fix"

* tag 'drm-fixes-2019-04-12' of git://anongit.freedesktop.org/drm/drm: (32 commits)
  gpu: host1x: Fix compile error when IOMMU API is not available
  drm/i915/gvt: Roundup fb->height into tile's height at calucation fb->size
  drm/i915/dp: revert back to max link rate and lane count on eDP
  drm/i915/icl: Fix port disable sequence for mipi-dsi
  drm/i915/icl: Ungate ddi clocks before IO enable
  drm/mediatek: no change parent rate in round_rate() for MT2701 hdmi phy
  drm/mediatek: using new factor for tvdpll for MT2701 hdmi phy
  drm/mediatek: remove flag CLK_SET_RATE_PARENT for MT2701 hdmi phy
  drm/mediatek: make implementation of recalc_rate() for MT2701 hdmi phy
  drm/mediatek: fix the rate and divder of hdmi phy for MT2701
  drm/mediatek: fix possible object reference leak
  drm/i915: Get power refs in encoder->get_power_domains()
  drm/i915: Fix pipe_bpp readout for BXT/GLK DSI
  drm/amd/display: Fix negative cursor pos programming (v2)
  drm/sun4i: tcon top: Fix NULL/invalid pointer dereference in sun8i_tcon_top_un/bind
  drm/udl: add a release method and delay modeset teardown
  drm/i915/gvt: Prevent use-after-free in ppgtt_free_all_spt()
  drm/i915/gvt: Annotate iomem usage
  drm/sun4i: DW HDMI: Lower max. supported rate for H6
  Revert "Documentation/gpu/meson: Remove link to meson_canvas.c"
  ...

The exlcusion range limit register needs to contain the
base-address of the last page that is part of the range, as
bits 0-11 of this register are treated as 0xfff by the
hardware for comparisons.

So correctly set the exclusion range in the hardware to the
last page which is _in_ the range.

Fixes: b2026aa2 ('x86, AMD IOMMU: add functions for programming IOMMU MMIO space')
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Re-run the shell fragment that generated the original list now that
there are two dozens of new entries after v5.1's merge window.
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>

Thomas-Mich Richter reported he triggered a WARN()ing from event_function_local()
on his s390. The problem boils down to:

	CPU-A				CPU-B

	perf_event_overflow()
	  perf_event_disable_inatomic()
	    @pending_disable = 1
	    irq_work_queue();

	sched-out
	  event_sched_out()
	    @pending_disable = 0

					sched-in
					perf_event_overflow()
					  perf_event_disable_inatomic()
					    @pending_disable = 1;
					    irq_work_queue(); // FAILS

	irq_work_run()
	  perf_pending_event()
	    if (@pending_disable)
	      perf_event_disable_local(); // WHOOPS

The problem exists in generic, but s390 is particularly sensitive
because it doesn't implement arch_irq_work_raise(), nor does it call
irq_work_run() from it's PMU interrupt handler (nor would that be
sufficient in this case, because s390 also generates
perf_event_overflow() from pmu::stop). Add to that the fact that s390
is a virtual architecture and (virtual) CPU-A can stall long enough
for the above race to happen, even if it would self-IPI.

Adding a irq_work_sync() to event_sched_in() would work for all hardare
PMUs that properly use irq_work_run() but fails for software PMUs.

Instead encode the CPU number in @pending_disable, such that we can
tell which CPU requested the disable. This then allows us to detect
the above scenario and even redirect the IPI to make up for the failed
queue.
Reported-by: Thomas-Mich Richter <tmricht@linux.ibm.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'drm-intel-fixes-2019-04-11' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Revert back to max link rate and lane count on eDP.
- DSI related fixes for all platforms including Ice Lake.
- GVT Fixes including one vGPU display plane size regression fix,
one for preventing use-after-free in ppgtt shadow free function,
and another warning fix for iomem access annotation.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411235832.GA6476@intel.com

Pull btrfs fixes from David Sterba:

 - fix parsing of compression algorithm when set as a inode property,
   this could end up with eg. 'zst' or 'zli' in the value

 - don't allow trim on a filesystem with unreplayed log, this could
   cause data loss if there are pending updates to the block groups that
   would not be subject to trim after replay

* tag 'for-5.1-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: prop: fix vanished compression property after failed set
  btrfs: prop: fix zstd compression parameter validation
  Btrfs: do not allow trimming when a fs is mounted with the nologreplay option

 - core: Make atomic_enable and disable optional for CRTC
 - dw-hdmi: Lower max frequency for the Allwinner H6, SCDC configuration
            improvements for older controller versions
 - omap: a fix for the CEC clock management policy
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411151658.orm46ccd5zmrw27l@flea

With skip set to 1, I get a traceback like this:

[  106.867637] DMA-API: Mapped at:
[  106.870784]  afu_dma_map_region+0x2cd/0x4f0 [dfl_afu]
[  106.875839]  afu_ioctl+0x258/0x380 [dfl_afu]
[  106.880108]  do_vfs_ioctl+0xa9/0x720
[  106.883688]  ksys_ioctl+0x60/0x90
[  106.887007]  __x64_sys_ioctl+0x16/0x20

With the previous value of 2, afu_dma_map_region was being omitted.  I
suspect that the code paths have simply changed since the value of 2 was
chosen a decade ago, but it's also possible that it varies based on which
mapping function was used, compiler inlining choices, etc.  In any case,
it's best to err on the side of skipping less.
Signed-off-by: Scott Wood <swood@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

gvt-fixes-2019-04-11

- Fix sparse warning on iomem usage (Chris)
- Prevent use-after-free for ppgtt shadow table free (Chris)
- Fix display plane size regression for tiled surface (Xiong)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411064910.GF17995@zhen-hp.sh.intel.com

Merge tag 'asoc-fix-v5.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.1

A few core fixes along with the driver specific ones, mainly fixing
small issues that only affect x86 platforms for various reasons (their
unusual machine enumeration mechanisms mainly, plus a fix for error
handling in topology).

There's some of the driver fixes that look larger than they are, like
the hdmi-codec changes which resulted in an indentation change, and most
of the other large changes are for new drivers like the STM32 changes.

commit 5b0d6210 ("mmc: sdhci-omap: Add platform specific reset
callback") skips data resets during tuning operation. Because of this,
a data error or data finish interrupt might still arrive after a command
error has been handled and the mrq ended. This ends up with a "mmc0: Got
data interrupt 0x00000002 even though no data operation was in progress"
error message.

Fix this by adding a platform specific callback for sdhci_irq. Mark the
mrq as a failure but wait for a data interrupt instead of calling
finish_mrq().

Fixes: 5b0d6210 ("mmc: sdhci-omap: Add platform specific reset
callback")
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

A few fixes for 5.1:
- Cursor fixes
- Add missing picasso pci id to KFD
- XGMI fix
- Shadow buffer handling fix for GPU reset
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190410183031.3710-1-alexander.deucher@amd.com

Merge branch 'mediatek-drm-fixes-5.1' of https://github.com/ckhu-mediatek/linux.git-tags into drm-fixes

This include stable MT2701 HDMI, framebuffer device and some fixes for
mediatek drm driver.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1554860914.29842.4.camel@mtksdaap41

drm/tegra: Fixes for v5.1-rc5

A single, one-line fix for a build error introduced in v5.1-rc1.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411084106.7552-1-thierry.reding@gmail.com

In case the IOMMU API is not available compiling host1x fails with
the following error:

  In file included from drivers/gpu/host1x/hw/host1x06.c:27:
  drivers/gpu/host1x/hw/channel_hw.c: In function ‘host1x_channel_set_streamid’:
  drivers/gpu/host1x/hw/channel_hw.c:118:30: error: implicit declaration of function
    ‘dev_iommu_fwspec_get’; did you mean ‘iommu_fwspec_free’?  [-Werror=implicit-function-declaration]
  struct iommu_fwspec *spec = dev_iommu_fwspec_get(channel->dev->parent);
                              ^~~~~~~~~~~~~~~~~~~~
                              iommu_fwspec_free

Fixes: de5469c2 ("gpu: host1x: Program the channel stream ID")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>

When fb is tiled and fb->height isn't the multiple of tile's height,
the format fb->size = fb->stride * fb->height, will get a smaller size
than the actual size. As the memory height of tiled fb should be multiple
of tile's height.

Fixes: 7f1a93b1 ("drm/i915/gvt: Correct the calculation of plane size")
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

Now that we allow drivers to always need to set larger than required
DMA masks we need to be a little more careful in the sun4v PCI iommu
driver to chose when to select the ATU support - a larger DMA mask
can be set even when the platform does not support ATU, so we always
have to check if it is avaiable before using it.  Add a little helper
for that and use it in all the places where we make ATU usage decisions
based on the DMA mask.

Fixes: 24132a41 ("sparc64/pci_sun4v: allow large DMA masks")
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Meelis Roos <mroos@linux.ee>
Acked-by: David S. Miller <davem@davemloft.net>

Pull rdma fixes from Jason Gunthorpe:
 "Several driver bug fixes posted in the last several weeks

   - Several bug fixes for the hfi1 driver 'TID RDMA' functionality
     merged into 5.1. Since TID RDMA is on by default these all seem to
     be regressions.

   - Wrong software permission checks on memory in mlx5

   - Memory leak in vmw_pvrdma during driver remove

   - Several bug fixes for hns driver features merged into 5.1"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  IB/hfi1: Do not flush send queue in the TID RDMA second leg
  RDMA/hns: Bugfix for SCC hem free
  RDMA/hns: Fix bug that caused srq creation to fail
  RDMA/vmw_pvrdma: Fix memory leak on pvrdma_pci_remove
  IB/mlx5: Reset access mask when looping inside page fault handler
  IB/hfi1: Fix the allocation of RSM table
  IB/hfi1: Eliminate opcode tests on mr deref
  IB/hfi1: Clear the IOWAIT pending bits when QP is put into error state
  IB/hfi1: Failed to drain send queue when QP is put into error state

When a QP is put into error state, the send queue will be flushed.
This mechanism is implemented in both the first and the second leg
of the send engine. Since the second leg is only responsible for
data transactions in the KDETH space for the TID RDMA WRITE request,
it should not perform the flushing of the send queue.

This patch removes the flushing function of the second leg, but
still keeps the bailing out of the QP if it is put into error state.

Fixes: 70dcb2e3 ("IB/hfi1: Add the TID second leg send packet builder")
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Pull virtio fixes from Michael Tsirkin:
 "Several fixes, add more reviewers to the list"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio: Honour 'may_reduce_num' in vring_create_virtqueue
  MAiNTAINERS: add Paolo, Stefan for virtio blk/scsi
  virtio_pci: fix a NULL pointer reference in vp_del_vqs

wcd9335.c: undefined reference to 'devm_regmap_add_irq_chip'
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

Commit 7769db58 ("drm/i915/dp: optimize eDP 1.4+ link config fast
and narrow") started to optize the eDP 1.4+ link config, both per spec
and as preparation for display stream compression support.

Sadly, we again face panels that flat out fail with parameters they
claim to support. Revert, and go back to the drawing board.

v2: Actually revert to max params instead of just wide-and-slow.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109959
Fixes: 7769db58 ("drm/i915/dp: optimize eDP 1.4+ link config fast and narrow")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.0+
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Tested-by: Albert Astals Cid <aacid@kde.org> # v5.0 backport
Tested-by: Emanuele Panigati <ilpanich@gmail.com> # v5.0 backport
Tested-by: Matteo Iervasi <matteoiervasi@gmail.com> # v5.0 backport
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190405075220.9815-1-jani.nikula@intel.com
(cherry picked from commit f11cb1c1)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Re-enable clock gating of DDI clocks.

v2: Fix the default ddi clk state for mipi-dsi (Imre)

Fixes: 1026bea0 ("drm/i915/icl: Ungate DSI clocks")
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553513202-13863-2-git-send-email-vandita.kulkarni@intel.com
(cherry picked from commit 942d1cf4)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

IO enable sequencing needs ddi clocks enabled.
These clocks will be gated at a later point in
the enable sequence.

v2: Fix the commit header (Uma)
v3: Remove the redundant read (Ville)

Fixes: 949fc52a ("drm/i915/icl: add pll mapping for DSI")
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553513202-13863-1-git-send-email-vandita.kulkarni@intel.com
(cherry picked from commit c5b81a32)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

snd_hdac_display_power() doesn't handle the concurrent calls carefully
enough, and it may lead to the doubly get_power or put_power calls,
when a runtime PM and an async work get called in racy way.

This patch addresses it by reusing the bus->lock mutex that has been
used for protecting the link state change in ext bus code, so that it
can protect against racy display state changes.  The initialization of
bus->lock was moved from snd_hdac_ext_bus_init() to
snd_hdac_bus_init() as well accordingly.

Testcase: igt/i915_pm_rpm/module-reload #glk-dsi
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

The following commit:

  a0b0fd53 ("locking/lockdep: Free lock classes that are no longer in use")

changed the behavior of lockdep_free_key_range() from
unconditionally zapping lock classes into only zapping lock classes if
debug_lock == true. Not zapping lock classes if debug_lock == false leaves
dangling pointers in several lockdep datastructures, e.g. lock_class::name
in the all_lock_classes list.

The shell command "cat /proc/lockdep" causes the kernel to iterate the
all_lock_classes list. Hence the "unable to handle kernel paging request" cash
that Shenghui encountered by running cat /proc/lockdep.

Since the new behavior can cause cat /proc/lockdep to crash, restore the
pre-v5.1 behavior.

This patch avoids that cat /proc/lockdep triggers the following crash
with debug_lock == false:

  BUG: unable to handle kernel paging request at fffffbfff40ca448
  RIP: 0010:__asan_load1+0x28/0x50
  Call Trace:
   string+0xac/0x180
   vsnprintf+0x23e/0x820
   seq_vprintf+0x82/0xc0
   seq_printf+0x92/0xb0
   print_name+0x34/0xb0
   l_show+0x184/0x200
   seq_read+0x59e/0x6c0
   proc_reg_read+0x11f/0x170
   __vfs_read+0x4d/0x90
   vfs_read+0xc5/0x1f0
   ksys_read+0xab/0x130
   __x64_sys_read+0x43/0x50
   do_syscall_64+0x71/0x210
   entry_SYSCALL_64_after_hwframe+0x49/0xbe
Reported-by: shenghui <shhuiw@foxmail.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Fixes: a0b0fd53 ("locking/lockdep: Free lock classes that are no longer in use") # v5.1-rc1.
Link: https://lkml.kernel.org/r/20190403233552.124673-1-bvanassche@acm.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>

Handle error before returning when try_module_get() fails
to prevent inconsistent mutex lock/unlock.

Fixes: 52034add (ASoC: pcm: update module refcount if
		  module_get_upon_open is set)
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Before commit c5459b82 ("LSM: Plumb visibility into optional "enabled"
state"), /sys/module/apparmor/parameters/enabled would show "Y" or "N"
since it was using the "bool" handler. After being changed to "int",
this switched to "1" or "0", breaking the userspace AppArmor detection
of dbus-broker. This restores the Y/N output while keeping the LSM
infrastructure happy.

Before:
	$ cat /sys/module/apparmor/parameters/enabled
	1

After:
	$ cat /sys/module/apparmor/parameters/enabled
	Y
Reported-by: David Rheinsberg <david.rheinsberg@gmail.com>
Reviewed-by: David Rheinsberg <david.rheinsberg@gmail.com>
Link: https://lkml.kernel.org/r/CADyDSO6k8vYb1eryT4g6+EHrLCvb68GAbHVWuULkYjcZcYNhhw@mail.gmail.com
Fixes: c5459b82 ("LSM: Plumb visibility into optional "enabled" state")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>

When master clock is used, master clock rate is set exclusively.
Parent clocks of master clock cannot be changed after a call to
clk_set_rate_exclusive(). So the parent clock of SAI kernel clock
must be set before.
Ensure also that exclusive rate operations are balanced
in STM32 SAI driver.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>