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This commit fixes two errors in documents for perf-script-python and
perf-script-perl as below:
- /sys/kernel/debug/tracing events -> /sys/kernel/debug/tracing/events/
- trace_handled -> trace_unhandled
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Fixes: cff68e582237 ("perf/scripts: Add perf-trace-python Documentation")
Link: http://lkml.kernel.org/r/20170530111827.21732-3-sj38.park@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Script generated by the '--gen-script' option contains an outdated
comment. It mentions a 'perf-trace-python' document while it has been
renamed to 'perf-script-python'. Fix it.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 133dc4c39c57 ("perf: Rename 'perf trace' to 'perf script'")
Link: http://lkml.kernel.org/r/20170530111827.21732-2-sj38.park@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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An example in perf-probe documentation for pattern of function name
based probe addition is not providing example command for that case.
This commit fixes the example to give appropriate example command.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Fixes: ee391de876ae ("perf probe: Update perf probe document")
Link: http://lkml.kernel.org/r/20170507103642.30560-1-sj38.park@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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The Lifebook E546 and E557 touchpad were also not functioning and
worked after running:
echo "1" > /sys/devices/platform/i8042/serio2/crc_enabled
Add them to the list of machines that need this workaround.
Signed-off-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Reviewed-by: Arjan Opmeer <arjan@opmeer.net>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
- Only print NMI watchdog hint in 'perf stat' when it is enabled (Andi Kleen)
- Fix sys_mmap/sys_old_mmap shandling in s390 in 'perf trace' (Jiri Olsa)
- Disable breakpoint signal tests in powerpc, that lacks the perf kernel
glue to set breakpoint events and makes 'perf test' always fail (Jiri Olsa)
- Fix 'perf annotate' for branch instruction with multiple operands (Kim Phillips)
- Add missing powerpc triplet when disassembling with 'objdump' in 'perf
annotate' (Kim Phillips)
- Do not trow away partial unwound stacks when using libdw, making
callchains produced with it similar to those produced when linked with
the other DWARF unwind library supported in perf, libunwind (Milian Wolff)
- Fixes to properly handle kernel modules when processing build-id meta
events (Namhyung Kim)
- Fix handling of compressed modules in the build-id cache (Namhyung Kim)
- Fix 'perf annotate' failure when filename has special chars (Ravi Bangoria)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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hard disk IO latency varies a lot depending on spindle move. The latency
range could be from several microseconds to several milliseconds. It's
pretty hard to get the baseline latency used by io.low.
We will use a different stragety here. The idea is only using IO with
spindle move to determine if cgroup IO is in good state. For HD, if io
latency is small (< 1ms), we ignore the IO. Such IO is likely from
sequential IO, and is helpless to help determine if a cgroup's IO is
impacted by other cgroups. With this, we only account IO with big
latency. Then we can choose a hardcoded baseline latency for HD (4ms,
which is typical IO latency with seek). With all these settings, the
io.low latency works for both HD and SSD.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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While introducing HDMI support, component matching on connectors node
were bypassed since no driver would actually bind on the DT node.
But when only a CVBS connector is present, only a single node is found
in the graph, but ignored and a NULL match table is given to the
component code.
This code permits bypassing the components framework by binding directly
the DRM driver when no components needs to be loaded.
Fixes: a41e82e6c457 ("drm/meson: Add support for components")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1496067352-8733-1-git-send-email-narmstrong@baylibre.com
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I have encountered a NULL pointer dereference in
throtl_schedule_pending_timer:
[ 413.735396] BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
[ 413.735535] IP: [<ffffffff812ebbbf>] throtl_schedule_pending_timer+0x3f/0x210
[ 413.735643] PGD 22c8cf067 PUD 22cb34067 PMD 0
[ 413.735713] Oops: 0000 [#1] SMP
......
This is caused by the following case:
blk_throtl_bio
throtl_schedule_next_dispatch <= sq is top level one without parent
throtl_schedule_pending_timer
sq_to_tg(sq)->td->throtl_slice <= sq_to_tg(sq) returns NULL
Fix it by using sq_to_td instead of sq_to_tg(sq)->td, which will always
return a valid td.
Fixes: 297e3d854784 ("blk-throttle: make throtl_slice tunable")
Signed-off-by: Joseph Qi <qijiang.qj@alibaba-inc.com>
Reviewed-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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The clipped src coordinates have already been rotated by 270 degrees for
when the plane rotation is 90/270 degrees, hence the FBC code should no
longer swap the width and height.
Cc: stable@vger.kernel.org
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Fixes: b63a16f6cd89 ("drm/i915: Compute display surface offset in the plane check hook for SKL+")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170331180056.14086-4-ville.syrjala@linux.intel.com
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
(cherry picked from commit 73714c05df97d7527e7eaaa771472ef2ede46fa3)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Restore the lost has_fbc flag for mobile ILK.
Cc: Carlos Santa <carlos.santa@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Fixes: a13233804686 ("drm/i915: Introduce GEN5_FEATURES for device info")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170606133229.12439-1-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit c2d1a0ced2603c4a17fa9c53c37e415905cf5a6d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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The scanline counter is bonkers on VLV/CHV DSI. The scanline counter
increment is not lined up with the start of vblank like it is on
every other platform and output type. This causes problems for
both the vblank timestamping and atomic update vblank evasion.
On my FFRD8 machine at least, the scanline counter increment
happens about 1/3 of a scanline ahead of the start of vblank (which
is where all register latching happens still). That means we can't
trust the scanline counter to tell us whether we're in vblank or not
while we're on that particular line. In order to keep vblank
timestamping in working condition when called from the vblank irq,
we'll leave scanline_offset at one, which means that the entire
line containing the start of vblank is considered to be inside
the vblank.
For the vblank evasion we'll need to consider that entire line
to be bad, since we can't tell whether the registers already
got latched or not. And we can't actually use the start of vblank
interrupt to get us past that line as the interrupt would fire
too soon, and then we'd up waiting for the next start of vblank
instead. One way around that would using the frame start
interrupt instead since that wouldn't fire until the next
scanline, but that would require some bigger changes in the
interrupt code. So for simplicity we'll just poll until we get
past the bad line.
v2: Adjust the comments a bit
Cc: stable@vger.kernel.org
Cc: Jonas Aaberg <cja@gmx.net>
Tested-by: Jonas Aaberg <cja@gmx.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99086
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161215174734.28779-1-ville.syrjala@linux.intel.com
Tested-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
(cherry picked from commit ec1b4ee2834e66884e5b0d3d465f347ff212e372)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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The assertion that we want to make before disabling the pin of the pages
for the unknown swizzling quirk is that the quirk is indeed active, and
that the quirk is disabled before we do apply it to the pages.
Fixes: 2c3a3f44dc13 ("drm/i915: Fix pages pin counting around swizzle quirk")
Fixes: 957870f93412 ("drm/i915: Split out i915_gem_object_set_tiling()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170521124014.27678-1-chris@chris-wilson.co.uk
Reviewed-bhy: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 20bb377106af69d16269b1837e9a945b9f508a2e)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Commit 7c3f86b6dc51 ("drm/i915: Invalidate the guc ggtt TLB upon
insertion") added the restoration of the invalidation routine after the
GuC was disabled, but missed that the GuC was unconditionally disabled
when not used. This then overwrites the invalidate routine for the older
chipsets, causing havoc and breaking resume as the most obvious victim.
We place the guard inside i915_ggtt_disable_guc() to be backport
friendly (the bug was introduced into v4.11) but it would be preferred
to be in more control over when this was guard (i.e. do not try and
teardown the data structures before we have enabled them). That should
be true with the reorganisation of the guc loaders.
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: 7c3f86b6dc51 ("drm/i915: Invalidate the guc ggtt TLB upon insertion")
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: <stable@vger.kernel.org> # v4.11+
Link: http://patchwork.freedesktop.org/patch/msgid/20170531190514.3691-1-chris@chris-wilson.co.uk
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
(cherry picked from commit cb60606d835ca8b2f744835116bcabe64ce88849)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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On some systems there can be a race condition in which no crtc state is
added to the first atomic commit. This results in all crtc's having a
null DDB allocation, causing a FIFO underrun on any update until the
first modeset.
Changes since v1:
- Do not take the connection_mutex, this is already done below.
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Inspired-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 98d39494d375 ("drm/i915/gen9: Compute DDB allocation at atomic
check time (v4)")
Cc: <stable@vger.kernel.org> # v4.8+
Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170531154236.27180-1-maarten.lankhorst@linux.intel.com
Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
(cherry picked from commit 367d73d2806085bb507ab44c1f532640917fd5ca)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Since
commit bac2a909a096c9110525c18cbb8ce73c660d5f71
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Wed Jan 21 02:17:42 2015 +0100
PCI / PM: Avoid resuming PCI devices during system suspend
PCI devices will default to allowing the system suspend complete
optimization where devices are not woken up during system suspend if
they were already runtime suspended. This however breaks the i915/HDA
drivers for two reasons:
- The i915 driver has system suspend specific steps that it needs to
run, that bring the device to a different state than its runtime
suspended state.
- The HDA driver's suspend handler requires power that it will request
from the i915 driver's power domain handler. This in turn requires the
i915 driver to runtime resume itself, but this won't be possible if the
suspend complete optimization is in effect: in this case the i915
runtime PM is disabled and trying to get an RPM reference returns
-EACCESS.
Solve this by requiring the PCI/PM core to resume the device during
system suspend which in effect disables the suspend complete optimization.
Regardless of the above commit the optimization stayed disabled for DRM
devices until
commit d14d2a8453d650bea32a1c5271af1458cd283a0f
Author: Lukas Wunner <lukas@wunner.de>
Date: Wed Jun 8 12:49:29 2016 +0200
drm: Remove dev_pm_ops from drm_class
so this patch is in practice a fix for this commit. Another reason for
the bug staying hidden for so long is that the optimization for a device
is disabled if it's disabled for any of its children devices. i915 may
have a backlight device as its child which doesn't support runtime PM
and so doesn't allow the optimization either. So if this backlight
device got registered the bug stayed hidden.
Credits to Marta, Tomi and David who enabled pstore logging,
that caught one instance of this issue across a suspend/
resume-to-ram and Ville who rememberd that the optimization was enabled
for some devices at one point.
The first WARN triggered by the problem:
[ 6250.746445] WARNING: CPU: 2 PID: 17384 at drivers/gpu/drm/i915/intel_runtime_pm.c:2846 intel_runtime_pm_get+0x6b/0xd0 [i915]
[ 6250.746448] pm_runtime_get_sync() failed: -13
[ 6250.746451] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel e1000e snd_hda_codec snd_hwdep snd_hda_core ptp mei_me pps_core snd_pcm lpc_ich mei prime_
numbers i2c_hid i2c_designware_platform i2c_designware_core [last unloaded: i915]
[ 6250.746512] CPU: 2 PID: 17384 Comm: kworker/u8:0 Tainted: G U W 4.11.0-rc5-CI-CI_DRM_334+ #1
[ 6250.746515] Hardware name: /NUC5i5RYB, BIOS RYBDWi35.86A.0362.2017.0118.0940 01/18/2017
[ 6250.746521] Workqueue: events_unbound async_run_entry_fn
[ 6250.746525] Call Trace:
[ 6250.746530] dump_stack+0x67/0x92
[ 6250.746536] __warn+0xc6/0xe0
[ 6250.746542] ? pci_restore_standard_config+0x40/0x40
[ 6250.746546] warn_slowpath_fmt+0x46/0x50
[ 6250.746553] ? __pm_runtime_resume+0x56/0x80
[ 6250.746584] intel_runtime_pm_get+0x6b/0xd0 [i915]
[ 6250.746610] intel_display_power_get+0x1b/0x40 [i915]
[ 6250.746646] i915_audio_component_get_power+0x15/0x20 [i915]
[ 6250.746654] snd_hdac_display_power+0xc8/0x110 [snd_hda_core]
[ 6250.746661] azx_runtime_resume+0x218/0x280 [snd_hda_intel]
[ 6250.746667] pci_pm_runtime_resume+0x76/0xa0
[ 6250.746672] __rpm_callback+0xb4/0x1f0
[ 6250.746677] ? pci_restore_standard_config+0x40/0x40
[ 6250.746682] rpm_callback+0x1f/0x80
[ 6250.746686] ? pci_restore_standard_config+0x40/0x40
[ 6250.746690] rpm_resume+0x4ba/0x740
[ 6250.746698] __pm_runtime_resume+0x49/0x80
[ 6250.746703] pci_pm_suspend+0x57/0x140
[ 6250.746709] dpm_run_callback+0x6f/0x330
[ 6250.746713] ? pci_pm_freeze+0xe0/0xe0
[ 6250.746718] __device_suspend+0xf9/0x370
[ 6250.746724] ? dpm_watchdog_set+0x60/0x60
[ 6250.746730] async_suspend+0x1a/0x90
[ 6250.746735] async_run_entry_fn+0x34/0x160
[ 6250.746741] process_one_work+0x1f2/0x6d0
[ 6250.746749] worker_thread+0x49/0x4a0
[ 6250.746755] kthread+0x107/0x140
[ 6250.746759] ? process_one_work+0x6d0/0x6d0
[ 6250.746763] ? kthread_create_on_node+0x40/0x40
[ 6250.746768] ret_from_fork+0x2e/0x40
[ 6250.746778] ---[ end trace 102a62fd2160f5e6 ]---
v2:
- Use the new pci_dev->needs_resume flag, to avoid any overhead during
the ->pm_prepare hook. (Rafael)
v3:
- Update commit message to reference the actual regressing commit.
(Lukas)
v4:
- Rebase on v4 of patch 1/2.
Fixes: d14d2a8453d6 ("drm: Remove dev_pm_ops from drm_class")
References: https://bugs.freedesktop.org/show_bug.cgi?id=100378
References: https://bugs.freedesktop.org/show_bug.cgi?id=100770
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Marta Lofstedt <marta.lofstedt@intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: linux-pci@vger.kernel.org
Cc: <stable@vger.kernel.org> # v4.10.x: 4d071c3 - PCI/PM: Add needs_resume flag
Cc: <stable@vger.kernel.org> # v4.10.x
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-and-tested-by: Marta Lofstedt <marta.lofstedt@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1493726649-32094-2-git-send-email-imre.deak@intel.com
(cherry picked from commit adfdf85d795f4d4f487b61ee0b169d64c6e19081)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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psr1 is also disabled for panel resolution greater than 32X20.
Added psr2 check to disable only for psr2 panels having resolution
greater than 32X20.
issue was introduced by
commit-id : "acf45d11050abd751dcec986ab121cb2367dcbba"
commit message: "PSR2 is restricted to work with panel resolutions
upto 3200x2000, move the check to intel_psr_match_conditions and fully
block psr."
v2: (Rodrigo)
Add previous commit details which introduced the issue
Fixes: acf45d11050a ("drm/i915/psr: disable psr2 for resolution greater than 32X20")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Cc: Yaroslav Shabalin <yaroslav.shabalin@gmail.com>
Reported-by: Yaroslav Shabalin <yaroslav.shabalin@gmail.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: vathsala nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/49935bdff896ee3140bed471012b9f9110a863a4.1495729964.git.vathsala.nagaraju@intel.com
(cherry picked from commit bef8c056fba09aa4629fe5a2d3efe64068d049db)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Allow intel_engine_is_idle() to be called outside of the GT wakeref by
acquiring the device runtime pm for ourselves. This allows the function
to act as check after we assume the engine is idle and we release the GT
wakeref held whilst we have requests. At the moment, we do not call it
outside of an awake context but taking the wakeref as required makes it
more convenient to use for quick debugging in future.
[ 2613.401647] RPM wakelock ref not held during HW access
[ 2613.401684] ------------[ cut here ]------------
[ 2613.401720] WARNING: CPU: 5 PID: 7739 at drivers/gpu/drm/i915/intel_drv.h:1787 gen6_read32+0x21f/0x2b0 [i915]
[ 2613.401731] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_realtek coretemp snd_hda_codec_generic crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm r8169 mii mei_me lpc_ich mei prime_numbers [last unloaded: i915]
[ 2613.401823] CPU: 5 PID: 7739 Comm: drv_missed_irq Tainted: G U 4.12.0-rc2-CI-CI_DRM_421+ #1
[ 2613.401825] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
[ 2613.401840] task: ffff880409e3a740 task.stack: ffffc900084dc000
[ 2613.401861] RIP: 0010:gen6_read32+0x21f/0x2b0 [i915]
[ 2613.401863] RSP: 0018:ffffc900084dfce8 EFLAGS: 00010292
[ 2613.401869] RAX: 000000000000002a RBX: ffff8804016a8000 RCX: 0000000000000006
[ 2613.401871] RDX: 0000000000000006 RSI: ffffffff81cbf2d9 RDI: ffffffff81c9e3a7
[ 2613.401874] RBP: ffffc900084dfd18 R08: ffff880409e3afc8 R09: 0000000000000000
[ 2613.401877] R10: 000000008a1c483f R11: 0000000000000000 R12: 000000000000209c
[ 2613.401879] R13: 0000000000000001 R14: ffff8804016a8000 R15: ffff8804016ac150
[ 2613.401882] FS: 00007f39ef3dd8c0(0000) GS:ffff88041fb40000(0000) knlGS:0000000000000000
[ 2613.401885] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2613.401887] CR2: 00000000023717c8 CR3: 00000002e7b34000 CR4: 00000000001406e0
[ 2613.401889] Call Trace:
[ 2613.401912] intel_engine_is_idle+0x76/0x90 [i915]
[ 2613.401931] i915_gem_wait_for_idle+0xe6/0x1e0 [i915]
[ 2613.401951] fault_irq_set+0x40/0x90 [i915]
[ 2613.401970] i915_ring_test_irq_set+0x42/0x50 [i915]
[ 2613.401976] simple_attr_write+0xc7/0xe0
[ 2613.401981] full_proxy_write+0x4f/0x70
[ 2613.401987] __vfs_write+0x23/0x120
[ 2613.401992] ? rcu_read_lock_sched_held+0x75/0x80
[ 2613.401996] ? rcu_sync_lockdep_assert+0x2a/0x50
[ 2613.401999] ? __sb_start_write+0xfa/0x1f0
[ 2613.402004] vfs_write+0xc5/0x1d0
[ 2613.402008] ? trace_hardirqs_on_caller+0xe7/0x1c0
[ 2613.402013] SyS_write+0x44/0xb0
[ 2613.402020] entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 2613.402022] RIP: 0033:0x7f39eded6670
[ 2613.402025] RSP: 002b:00007fffdcdcb1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 2613.402030] RAX: ffffffffffffffda RBX: ffffffff81470203 RCX: 00007f39eded6670
[ 2613.402033] RDX: 0000000000000001 RSI: 000000000041bc33 RDI: 0000000000000006
[ 2613.402036] RBP: ffffc900084dff88 R08: 00007f39ef3dd8c0 R09: 0000000000000001
[ 2613.402038] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000041bc33
[ 2613.402041] R13: 0000000000000006 R14: 0000000000000000 R15: 0000000000000000
[ 2613.402046] ? __this_cpu_preempt_check+0x13/0x20
[ 2613.402052] Code: 01 9b fa e0 0f ff e9 28 fe ff ff 80 3d 6a dd 0e 00 00 0f 85 29 fe ff ff 48 c7 c7 48 19 29 a0 c6 05 56 dd 0e 00 01 e8 da 9a fa e0 <0f> ff e9 0f fe ff ff b9 01 00 00 00 ba 01 00 00 00 44 89 e6 48
[ 2613.402199] ---[ end trace 31f0cfa93ab632bf ]---
Fixes: 5400367a864d ("drm/i915: Ensure the engine is idle before manually changing HWS")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170530121334.17364-2-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
(cherry picked from commit a091d4ee931b16ce4fef945d39a20b851a7e17b7)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
|
|
If the device is asleep (no GT wakeref), we know the GPU is already idle.
If we add an early return, we can avoid touching registers and checking
hw state outside of the assumed GT wakelock. This prevents causing such
errors whilst debugging:
[ 2613.401647] RPM wakelock ref not held during HW access
[ 2613.401684] ------------[ cut here ]------------
[ 2613.401720] WARNING: CPU: 5 PID: 7739 at drivers/gpu/drm/i915/intel_drv.h:1787 gen6_read32+0x21f/0x2b0 [i915]
[ 2613.401731] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_realtek coretemp snd_hda_codec_generic crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm r8169 mii mei_me lpc_ich mei prime_numbers [last unloaded: i915]
[ 2613.401823] CPU: 5 PID: 7739 Comm: drv_missed_irq Tainted: G U 4.12.0-rc2-CI-CI_DRM_421+ #1
[ 2613.401825] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
[ 2613.401840] task: ffff880409e3a740 task.stack: ffffc900084dc000
[ 2613.401861] RIP: 0010:gen6_read32+0x21f/0x2b0 [i915]
[ 2613.401863] RSP: 0018:ffffc900084dfce8 EFLAGS: 00010292
[ 2613.401869] RAX: 000000000000002a RBX: ffff8804016a8000 RCX: 0000000000000006
[ 2613.401871] RDX: 0000000000000006 RSI: ffffffff81cbf2d9 RDI: ffffffff81c9e3a7
[ 2613.401874] RBP: ffffc900084dfd18 R08: ffff880409e3afc8 R09: 0000000000000000
[ 2613.401877] R10: 000000008a1c483f R11: 0000000000000000 R12: 000000000000209c
[ 2613.401879] R13: 0000000000000001 R14: ffff8804016a8000 R15: ffff8804016ac150
[ 2613.401882] FS: 00007f39ef3dd8c0(0000) GS:ffff88041fb40000(0000) knlGS:0000000000000000
[ 2613.401885] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2613.401887] CR2: 00000000023717c8 CR3: 00000002e7b34000 CR4: 00000000001406e0
[ 2613.401889] Call Trace:
[ 2613.401912] intel_engine_is_idle+0x76/0x90 [i915]
[ 2613.401931] i915_gem_wait_for_idle+0xe6/0x1e0 [i915]
[ 2613.401951] fault_irq_set+0x40/0x90 [i915]
[ 2613.401970] i915_ring_test_irq_set+0x42/0x50 [i915]
[ 2613.401976] simple_attr_write+0xc7/0xe0
[ 2613.401981] full_proxy_write+0x4f/0x70
[ 2613.401987] __vfs_write+0x23/0x120
[ 2613.401992] ? rcu_read_lock_sched_held+0x75/0x80
[ 2613.401996] ? rcu_sync_lockdep_assert+0x2a/0x50
[ 2613.401999] ? __sb_start_write+0xfa/0x1f0
[ 2613.402004] vfs_write+0xc5/0x1d0
[ 2613.402008] ? trace_hardirqs_on_caller+0xe7/0x1c0
[ 2613.402013] SyS_write+0x44/0xb0
[ 2613.402020] entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 2613.402022] RIP: 0033:0x7f39eded6670
[ 2613.402025] RSP: 002b:00007fffdcdcb1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 2613.402030] RAX: ffffffffffffffda RBX: ffffffff81470203 RCX: 00007f39eded6670
[ 2613.402033] RDX: 0000000000000001 RSI: 000000000041bc33 RDI: 0000000000000006
[ 2613.402036] RBP: ffffc900084dff88 R08: 00007f39ef3dd8c0 R09: 0000000000000001
[ 2613.402038] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000041bc33
[ 2613.402041] R13: 0000000000000006 R14: 0000000000000000 R15: 0000000000000000
[ 2613.402046] ? __this_cpu_preempt_check+0x13/0x20
[ 2613.402052] Code: 01 9b fa e0 0f ff e9 28 fe ff ff 80 3d 6a dd 0e 00 00 0f 85 29 fe ff ff 48 c7 c7 48 19 29 a0 c6 05 56 dd 0e 00 01 e8 da 9a fa e0 <0f> ff e9 0f fe ff ff b9 01 00 00 00 ba 01 00 00 00 44 89 e6 48
[ 2613.402199] ---[ end trace 31f0cfa93ab632bf ]---
Fixes: 25112b64b3d2 ("drm/i915: Wait for all engines to be idle as part of i915_gem_wait_for_idle()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170530121334.17364-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 863e9fde1a7061dad09bb299c65bed5f1ccb44ff)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
|
|
The decoupled MMIO feature doesn't work as intended by HW team. Enabling
it with forcewake will only make debugging efforts more difficult, so
let's disable it.
Fixes: 85ee17ebeedd ("drm/i915/bxt: Broxton decoupled MMIO")
Cc: Zhe Wang <zhe1.wang@intel.com>
Cc: Praveen Paneri <praveen.paneri@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Kai Chen <kai.chen@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170523215812.18328-2-kai.chen@intel.com
(cherry picked from commit 0051c10acabb631cfd439eae73289e6e4c39b2b7)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
|
|
This member was dropped long time ago.
Fixes: 774439e1 ("drm/i915/guc: re-optimise i915_guc_client layout")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170518113104.54400-1-michal.wajdeczko@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 4afc67be8e203ee8f5e95e829c0777eae7a14702)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
|
|
While the atomic modesetting capability is signaled also elsewhere, also
reflect it by a driver minor bump.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
|
|
These function implementations and/or declarations are no longer used
now that atomic is enabled.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reported-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
|
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Trivial fix to spelling mistake in DRM_ERROR error message.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
|
|
The previous attempt at this had an issue with with num_clips > 1
because it would always end up using the coordinates of the last
clip while using width and height calculated from the bounding
box of all the clips.
So if the last clip happens to be not at the top-left corner of
the bounding box, the CPU blit operation would go out of bounds.
The original intent was to coalesce all the clips into one blit,
and to do that we need to also track the starting point of the
content buffer.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
|
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When a new FB is bound, we have to send an update command otherwise
the new FB may not be shown
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
|
|
When vmw_gb_surface_define_ioctl() is called with an existing buffer,
we end up returning an uninitialized variable in the backup_handle.
The fix is to first initialize backup_handle to 0 just to be sure, and
second, when a user-provided buffer is found, we will use the
req->buffer_handle as the backup_handle.
Cc: <stable@vger.kernel.org>
Reported-by: Murray McAllister <murray.mcallister@insomniasec.com>
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
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If vmalloc() fails then we need to a bit of cleanup before returning.
Cc: <stable@vger.kernel.org>
Fixes: fb1d9738ca05 ("drm/vmwgfx: Add DRM driver for VMware Virtual GPU")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
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With atomic, the cursor surface is treated like a FB. Creating
a proxy surface for cursor doesn't gain us much benefit.
This fixes the issue on atomic enabled 2D VMs where the cursor
disappears.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
|
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The 'req->mip_levels' parameter in vmw_gb_surface_define_ioctl() is
a user-controlled 'uint32_t' value which is used as a loop count limit.
This can lead to a kernel lockup and DoS. Add check for 'req->mip_levels'.
References:
https://bugzilla.redhat.com/show_bug.cgi?id=1437431
Cc: <stable@vger.kernel.org>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
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BXT has a H/W issue with IOMMU which can lead to system hangs when
Aperture accesses are queued within the GAM behind GTT Accesses.
This patch avoids the condition by wrapping all GTT updates in stop_machine
and using a flushing read prior to restarting the machine.
The stop_machine guarantees no new Aperture accesses can begin while
the PTE writes are being emmitted. The flushing read ensures that
any following Aperture accesses cannot begin until the PTE writes
have been cleared out of the GAM's fifo.
Only FOLLOWING Aperture accesses need to be separated from in flight
PTE updates. PTE Writes may follow tightly behind already in flight
Aperture accesses, so no flushing read is required at the start of
a PTE update sequence.
This issue was reproduced by running
igt/gem_readwrite and
igt/gem_render_copy
simultaneously from different processes, each in a tight loop,
with INTEL_IOMMU enabled.
This patch was originally published as:
drm/i915: Serialize GTT Updates on BXT
[Note: This will cause a performance penalty for some use cases, but
avoiding hangs trumps performance hits. This may need to be worked
around in Mesa to recover the lost performance.]
v2: Move bxt/iommu detection into static function
Remove #ifdef CONFIG_INTEL_IOMMU protection
Make function names more reflective of purpose
Move flushing read into static function
v3: Tidy up for checkpatch.pl
Testcase: igt/gem_concurrent_blit
Signed-off-by: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: John Harrison <john.C.Harrison@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: stable@vger.kernel.org
Link: http://patchwork.freedesktop.org/patch/msgid/1495641251-30022-1-git-send-email-jon.bloomfield@intel.com
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 0ef34ad6222abfa513117515fec720c33a58f105)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Commit 5995a68 "xen/privcmd: Add support for Linux 64KB page granularity" did
not go far enough to support 64KB in mmap_batch_fn.
The variable 'nr' is the number of 4KB chunk to map. However, when Linux
is using 64KB page granularity the array of pages (vma->vm_private_data)
contain one page per 64KB. Fix it by incrementing st->index correctly.
Furthermore, st->va is not correctly incremented as PAGE_SIZE !=
XEN_PAGE_SIZE.
Fixes: 5995a68 ("xen/privcmd: Add support for Linux 64KB page granularity")
CC: stable@vger.kernel.org
Reported-by: Feng Kan <fkan@apm.com>
Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
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Christoph Hellwig suggests we should to make APST work out of the box.
Hence relax the the default max latency to make them able to enter
deepest power state on default.
Here are id-ctrl excerpts from two high latency NVMes:
vid : 0x14a4
ssvid : 0x1b4b
mn : CX2-GB1024-Q11 NVMe LITEON 1024GB
ps 3 : mp:0.1000W non-operational enlat:5000 exlat:5000 rrt:3 rrl:3
rwt:3 rwl:3 idle_power:- active_power:-
ps 4 : mp:0.0100W non-operational enlat:50000 exlat:100000 rrt:4 rrl:4
rwt:4 rwl:4 idle_power:- active_power:-
vid : 0x15b7
ssvid : 0x1b4b
mn : A400 NVMe SanDisk 512GB
ps 3 : mp:0.0500W non-operational enlat:51000 exlat:10000 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:- active_power:-
ps 4 : mp:0.0055W non-operational enlat:1000000 exlat:100000 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:- active_power:-
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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|
When a NVMe is in non-op states, the latency is exlat.
The latency will be enlat + exlat only when the NVMe tries to transit
from operational state right atfer it begins to transit to
non-operational state, which should be a rare case.
Therefore, as Andy Lutomirski suggests, use exlat only when deciding power
states to trainsit to.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
The failure case, of a create controller request, called
nvme_uninit_ctrl() but didn't do a put to allow the nvme
controller to be deleted.
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
Per FC-NVME, when lldd or transport detects an i/o error, the
connection must be terminated, which in turn requires the association
to be termianted. Currently the transport simply creates a nvme
completion status of transport error and returns the io. The FC-NVME
spec makes the mandate as initiator and host, depending on the error,
can get out of sync on outstanding io counts (sqhd/sqtail).
Implement the association teardown on lldd or transport detected
errors.
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
|
|
When we encounter an transport/controller errors, error recovery
kicks in which performs:
1. stops io/admin queues
2. moves transport queues out of LIVE state
3. fast fail pending io
4. schedule periodic reconnects.
But we also need to fast fail incoming IO taht enters after we
already scheduled. Given that our queue is not LIVE anymore, simply
restart the request queues to fail in .queue_rq
Reported-by: Alex Turin <alex@vastdata.com>
Reported-by: shahar.salzman <shahar.salzman@gmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
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Commit c5f6ce97c1210 tries to address multiple resets but fails as
work_busy doesn't involve any synchronization and can fail. This is
reproducible easily as can be seen by WARNING below which is triggered
with line:
WARN_ON(dev->ctrl.state == NVME_CTRL_RESETTING)
Allowing multiple resets can result in multiple controller removal as
well if different conditions inside nvme_reset_work fail and which
might deadlock on device_release_driver.
[ 480.327007] WARNING: CPU: 3 PID: 150 at drivers/nvme/host/pci.c:1900 nvme_reset_work+0x36c/0xec0
[ 480.327008] Modules linked in: rfcomm fuse nf_conntrack_netbios_ns nf_conntrack_broadcast...
[ 480.327044] btusb videobuf2_core ghash_clmulni_intel snd_hwdep cfg80211 acer_wmi hci_uart..
[ 480.327065] CPU: 3 PID: 150 Comm: kworker/u16:2 Not tainted 4.12.0-rc1+ #13
[ 480.327065] Hardware name: Acer Predator G9-591/Mustang_SLS, BIOS V1.10 03/03/2016
[ 480.327066] Workqueue: nvme nvme_reset_work
[ 480.327067] task: ffff880498ad8000 task.stack: ffffc90002218000
[ 480.327068] RIP: 0010:nvme_reset_work+0x36c/0xec0
[ 480.327069] RSP: 0018:ffffc9000221bdb8 EFLAGS: 00010246
[ 480.327070] RAX: 0000000000460000 RBX: ffff880498a98128 RCX: dead000000000200
[ 480.327070] RDX: 0000000000000001 RSI: ffff8804b1028020 RDI: ffff880498a98128
[ 480.327071] RBP: ffffc9000221be50 R08: 0000000000000000 R09: 0000000000000000
[ 480.327071] R10: ffffc90001963ce8 R11: 000000000000020d R12: ffff880498a98000
[ 480.327072] R13: ffff880498a53500 R14: ffff880498a98130 R15: ffff880498a98128
[ 480.327072] FS: 0000000000000000(0000) GS:ffff8804c1cc0000(0000) knlGS:0000000000000000
[ 480.327073] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 480.327074] CR2: 00007ffcf3c37f78 CR3: 0000000001e09000 CR4: 00000000003406e0
[ 480.327074] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 480.327075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 480.327075] Call Trace:
[ 480.327079] ? __switch_to+0x227/0x400
[ 480.327081] process_one_work+0x18c/0x3a0
[ 480.327082] worker_thread+0x4e/0x3b0
[ 480.327084] kthread+0x109/0x140
[ 480.327085] ? process_one_work+0x3a0/0x3a0
[ 480.327087] ? kthread_park+0x60/0x60
[ 480.327102] ret_from_fork+0x2c/0x40
[ 480.327103] Code: e8 5a dc ff ff 85 c0 41 89 c1 0f.....
This patch addresses the problem by using state of controller to
decide whether reset should be queued or not as state change is
synchronizated using controller spinlock. Also cancel_work_sync is
used to make sure remove cancels the reset_work and waits for it to
finish. This patch also changes return value from -ENODEV to more
appropriate -EBUSY if nvme_reset fails to change state.
Fixes: c5f6ce97c1210 ("nvme: don't schedule multiple resets")
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
We need to start admin queues too in nvme_kill_queues()
for avoiding hang in remove path[1].
This patch is very similar with 806f026f9b901eaf(nvme: use
blk_mq_start_hw_queues() in nvme_kill_queues()).
[1] hang stack trace
[<ffffffff813c9716>] blk_execute_rq+0x56/0x80
[<ffffffff815cb6e9>] __nvme_submit_sync_cmd+0x89/0xf0
[<ffffffff815ce7be>] nvme_set_features+0x5e/0x90
[<ffffffff815ce9f6>] nvme_configure_apst+0x166/0x200
[<ffffffff815cef45>] nvme_set_latency_tolerance+0x35/0x50
[<ffffffff8157bd11>] apply_constraint+0xb1/0xc0
[<ffffffff8157cbb4>] dev_pm_qos_constraints_destroy+0xf4/0x1f0
[<ffffffff8157b44a>] dpm_sysfs_remove+0x2a/0x60
[<ffffffff8156d951>] device_del+0x101/0x320
[<ffffffff8156db8a>] device_unregister+0x1a/0x60
[<ffffffff8156dc4c>] device_destroy+0x3c/0x50
[<ffffffff815cd295>] nvme_uninit_ctrl+0x45/0xa0
[<ffffffff815d4858>] nvme_remove+0x78/0x110
[<ffffffff81452b69>] pci_device_remove+0x39/0xb0
[<ffffffff81572935>] device_release_driver_internal+0x155/0x210
[<ffffffff81572a02>] device_release_driver+0x12/0x20
[<ffffffff815d36fb>] nvme_remove_dead_ctrl_work+0x6b/0x70
[<ffffffff810bf3bc>] process_one_work+0x18c/0x3a0
[<ffffffff810bf61e>] worker_thread+0x4e/0x3b0
[<ffffffff810c5ac9>] kthread+0x109/0x140
[<ffffffff8185800c>] ret_from_fork+0x2c/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
Fixes: c5552fde102fc("nvme: Enable autonomous power state transitions")
Reported-by: Rakesh Pandit <rakesh@tuxera.com>
Tested-by: Rakesh Pandit <rakesh@tuxera.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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snd_timer_user_tselect() reallocates the queue buffer dynamically, but
it forgot to reset its indices. Since the read may happen
concurrently with ioctl and snd_timer_user_tselect() allocates the
buffer via kmalloc(), this may lead to the leak of uninitialized
kernel-space data, as spotted via KMSAN:
BUG: KMSAN: use of unitialized memory in snd_timer_user_read+0x6c4/0xa10
CPU: 0 PID: 1037 Comm: probe Not tainted 4.11.0-rc5+ #2739
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:16
dump_stack+0x143/0x1b0 lib/dump_stack.c:52
kmsan_report+0x12a/0x180 mm/kmsan/kmsan.c:1007
kmsan_check_memory+0xc2/0x140 mm/kmsan/kmsan.c:1086
copy_to_user ./arch/x86/include/asm/uaccess.h:725
snd_timer_user_read+0x6c4/0xa10 sound/core/timer.c:2004
do_loop_readv_writev fs/read_write.c:716
__do_readv_writev+0x94c/0x1380 fs/read_write.c:864
do_readv_writev fs/read_write.c:894
vfs_readv fs/read_write.c:908
do_readv+0x52a/0x5d0 fs/read_write.c:934
SYSC_readv+0xb6/0xd0 fs/read_write.c:1021
SyS_readv+0x87/0xb0 fs/read_write.c:1018
This patch adds the missing reset of queue indices. Together with the
previous fix for the ioctl/read race, we cover the whole problem.
Reported-by: Alexander Potapenko <glider@google.com>
Tested-by: Alexander Potapenko <glider@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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The read from ALSA timer device, the function snd_timer_user_tread(),
may access to an uninitialized struct snd_timer_user fields when the
read is concurrently performed while the ioctl like
snd_timer_user_tselect() is invoked. We have already fixed the races
among ioctls via a mutex, but we seem to have forgotten the race
between read vs ioctl.
This patch simply applies (more exactly extends the already applied
range of) tu->ioctl_lock in snd_timer_user_tread() for closing the
race window.
Reported-by: Alexander Potapenko <glider@google.com>
Tested-by: Alexander Potapenko <glider@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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As agreed with Ryan, change the maintainership.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Ryan Mallon <rmallon@gmail.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Revert commit eed4d47efe95 (ACPI / sleep: Ignore spurious SCI wakeups
from suspend-to-idle) as it turned out to be premature and triggered
a number of different issues on various systems.
That includes, but is not limited to, premature suspend-to-RAM aborts
on Dell XPS 13 (9343) reported by Dominik.
The issue the commit in question attempted to address is real and
will need to be taken care of going forward, but evidently more work
is needed for this purpose.
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Pull networking fixes from David Miller:
1) Made TCP congestion control documentation match current reality,
from Anmol Sarma.
2) Various build warning and failure fixes from Arnd Bergmann.
3) Fix SKB list leak in ipv6_gso_segment().
4) Use after free in ravb driver, from Eugeniu Rosca.
5) Don't use udp_poll() in ping protocol driver, from Eric Dumazet.
6) Don't crash in PCI error recovery of cxgb4 driver, from Guilherme
Piccoli.
7) _SRC_NAT_DONE_BIT needs to be cleared using atomics, from Liping
Zhang.
8) Use after free in vxlan deletion, from Mark Bloch.
9) Fix ordering of NAPI poll enabled in ethoc driver, from Max
Filippov.
10) Fix stmmac hangs with TSO, from Niklas Cassel.
11) Fix crash in CALIPSO ipv6, from Richard Haines.
12) Clear nh_flags properly on mpls link up. From Roopa Prabhu.
13) Fix regression in sk_err socket error queue handling, noticed by
ping applications. From Soheil Hassas Yeganeh.
14) Update mlx4/mlx5 MAINTAINERS information.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (78 commits)
net: stmmac: fix a broken u32 less than zero check
net: stmmac: fix completely hung TX when using TSO
net: ethoc: enable NAPI before poll may be scheduled
net: bridge: fix a null pointer dereference in br_afspec
ravb: Fix use-after-free on `ifconfig eth0 down`
net/ipv6: Fix CALIPSO causing GPF with datagram support
net: stmmac: ensure jumbo_frm error return is correctly checked for -ve value
Revert "sit: reload iphdr in ipip6_rcv"
i40e/i40evf: proper update of the page_offset field
i40e: Fix state flags for bit set and clean operations of PF
iwlwifi: fix host command memory leaks
iwlwifi: fix min API version for 7265D, 3168, 8000 and 8265
iwlwifi: mvm: clear new beacon command template struct
iwlwifi: mvm: don't fail when removing a key from an inexisting sta
iwlwifi: pcie: only use d0i3 in suspend/resume if system_pm is set to d0i3
iwlwifi: mvm: fix firmware debug restart recording
iwlwifi: tt: move ucode_loaded check under mutex
iwlwifi: mvm: support ibss in dqa mode
iwlwifi: mvm: Fix command queue number on d0i3 flow
iwlwifi: mvm: rs: start using LQ command color
...
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Pull sparc fixes from David Miller:
1) Fix TLB context wrap races, from Pavel Tatashin.
2) Cure some gcc-7 build issues.
3) Handle invalid setup_hugepagesz command line values properly, from
Liam R Howlett.
4) Copy TSB using the correct address shift for the huge TSB, from Mike
Kravetz.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: delete old wrap code
sparc64: new context wrap
sparc64: add per-cpu mm of secondary contexts
sparc64: redefine first version
sparc64: combine activate_mm and switch_mm
sparc64: reset mm cpumask after wrap
sparc/mm/hugepages: Fix setup_hugepagesz for invalid values.
sparc: Machine description indices can vary
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
arch/sparc: support NR_CPUS = 4096
sparc64: Add __multi3 for gcc 7.x and later.
sparc64: Fix build warnings with gcc 7.
arch/sparc: increase CONFIG_NODES_SHIFT on SPARC64 to 5
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GCC explicitly does not warn for unused static inline functions for
-Wunused-function. The manual states:
Warn whenever a static function is declared but not defined or
a non-inline static function is unused.
Clang does warn for static inline functions that are unused.
It turns out that suppressing the warnings avoids potentially complex
#ifdef directives, which also reduces LOC.
Suppress the warning for clang.
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pavel Tatashin says:
====================
sparc64: context wrap fixes
This patch series contains fixes for context wrap: when we are out of
context ids, and need to get a new version.
It fixes memory corruption issues which happen when more than number of
context ids (currently set to 8K) number of processes are started
simultaneously, and processes can get a wrong context.
sparc64: new context wrap:
- contains explanation of new wrap method, and also explanation of races
that it solves
sparc64: reset mm cpumask after wrap
- explains issue of not reseting cpu mask on a wrap
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The old method that is using xcall and softint to get new context id is
deleted, as it is replaced by a method of using per_cpu_secondary_mm
without xcall to perform the context wrap.
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current wrap implementation has a race issue: it is called outside of
the ctx_alloc_lock, and also does not wait for all CPUs to complete the
wrap. This means that a thread can get a new context with a new version
and another thread might still be running with the same context. The
problem is especially severe on CPUs with shared TLBs, like sun4v. I used
the following test to very quickly reproduce the problem:
- start over 8K processes (must be more than context IDs)
- write and read values at a memory location in every process.
Very quickly memory corruptions start happening, and what we read back
does not equal what we wrote.
Several approaches were explored before settling on this one:
Approach 1:
Move smp_new_mmu_context_version() inside ctx_alloc_lock, and wait for
every process to complete the wrap. (Note: every CPU must WAIT before
leaving smp_new_mmu_context_version_client() until every one arrives).
This approach ends up with deadlocks, as some threads own locks which other
threads are waiting for, and they never receive softint until these threads
exit smp_new_mmu_context_version_client(). Since we do not allow the exit,
deadlock happens.
Approach 2:
Handle wrap right during mondo interrupt. Use etrap/rtrap to enter into
into C code, and issue new versions to every CPU.
This approach adds some overhead to runtime: in switch_mm() we must add
some checks to make sure that versions have not changed due to wrap while
we were loading the new secondary context. (could be protected by PSTATE_IE
but that degrades performance as on M7 and older CPUs as it takes 50 cycles
for each access). Also, we still need a global per-cpu array of MMs to know
where we need to load new contexts, otherwise we can change context to a
thread that is going way (if we received mondo between switch_mm() and
switch_to() time). Finally, there are some issues with window registers in
rtrap() when context IDs are changed during CPU mondo time.
The approach in this patch is the simplest and has almost no impact on
runtime. We use the array with mm's where last secondary contexts were
loaded onto CPUs and bump their versions to the new generation without
changing context IDs. If a new process comes in to get a context ID, it
will go through get_new_mmu_context() because of version mismatch. But the
running processes do not need to be interrupted. And wrap is quicker as we
do not need to xcall and wait for everyone to receive and complete wrap.
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The new wrap is going to use information from this array to figure out
mm's that currently have valid secondary contexts setup.
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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CTX_FIRST_VERSION defines the first context version, but also it defines
first context. This patch redefines it to only include the first context
version.
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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