diff options
| author | Chris Wilson | 2017-09-18 18:27:34 +0200 |
|---|---|---|
| committer | Chris Wilson | 2017-09-22 13:47:19 +0200 |
| commit | de4d2106f88ad7d98bf3adc602885d1d9071b644 (patch) | |
| tree | 72474958d42400b8cded1e4f23627cee8c701682 /drivers/gpu/drm/i915/intel_opregion.c | |
| parent | drm/i915: Only wake the waiter from the interrupt if passed (diff) | |
| download | kernel-qcow2-linux-de4d2106f88ad7d98bf3adc602885d1d9071b644.tar.gz kernel-qcow2-linux-de4d2106f88ad7d98bf3adc602885d1d9071b644.tar.xz kernel-qcow2-linux-de4d2106f88ad7d98bf3adc602885d1d9071b644.zip | |
drm/i915: Check waiter->seqno carefully in case of preemption
If preemption occurs at precisely the right moment, we may decide that
the wait is complete even though the wait's request is no longer
executing (having been preempted). We handle this situation by double
checking that request following deciding whether the wait is complete.
Reported-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170918162734.21294-2-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_opregion.c')
0 files changed, 0 insertions, 0 deletions