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authorOliver Hartkopp <socketcan@hartkopp.net>2017-01-18 21:30:51 +0100
committerMarc Kleine-Budde <mkl@pengutronix.de>2017-01-30 11:05:04 +0100
commita06393ed03167771246c4c43192d9c264bc48412 (patch)
tree31a3d03c374065a64e12f25cf628b7aa8edb8159 /tools/perf/arch/arm/tests/regs_load.S
parentd1156b489fa734d1af763d6a07b1637c01bb0aed (diff)
can: bcm: fix hrtimer/tasklet termination in bcm op removal
When removing a bcm tx operation either a hrtimer or a tasklet might run. As the hrtimer triggers its associated tasklet and vice versa we need to take care to mutually terminate both handlers. Reported-by: Michael Josenhans <michael.josenhans@web.de> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Tested-by: Michael Josenhans <michael.josenhans@web.de> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'tools/perf/arch/arm/tests/regs_load.S')
0 files changed, 0 insertions, 0 deletions
x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/power/cpupower/lib/cpupower.c')