drm/i915: Wrap engine->schedule in RCU locks for set-wedge protection

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Similar to the staging around handling of engine->submit_request, we
need to stop adding to the execlists->queue prior to calling
engine->cancel_requests. cancel_requests will move requests from the
queue onto the timeline, so if we add a request onto the queue after that
point, it will be lost.

Fixes: af7a8ffad9 ("drm/i915: Use rcu instead of stop_machine in set_wedged")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180307134226.25492-5-chris@chris-wilson.co.uk

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Chris Wilson 2018-03-07 13:42:25 +00:00

parent ef5032a06a

commit 47650db02d

2 changed files with 9 additions and 6 deletions

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13

drivers/gpu/drm/i915/i915_gem.c

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2

drivers/gpu/drm/i915/i915_request.c

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