drm/i915/execlist: Mark up racy read of execlists->pending[0]

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We write to execlists->pending[0] in process_csb() to acknowledge the
completion of the ESLP update, outside of the main spinlock. When we
check the current status of the previous submission in
__execlists_submission_tasklet() we should therefore use READ_ONCE() to
reflect and document the unsynchronized read.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200128171614.3845825-1-chris@chris-wilson.co.uk

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Chris Wilson 2020-01-28 17:16:14 +00:00

parent ba12993c52

commit 8a5746982e

1 changed files with 1 additions and 1 deletions

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drivers/gpu/drm/i915/gt/intel_lrc.c

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