drm/i915/selftests: Synchronize checking active status with retirement

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If retirement is running on another thread, we may inspect the status of
the i915_active before its retirement callback is complete. As we expect
it to be running synchronously, we can wait for any callback to complete
by acquiring the i915_active.mutex.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022112111.9317-1-chris@chris-wilson.co.uk

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Chris Wilson 2019-10-22 12:21:11 +01:00

parent 905da43c6a

commit f79520bb33

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

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