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drm/i915/selftests: Flush tasklet on wait_for_submit()

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Always flush the tasklet if we have pending submissions in
wait_for_submit(), so that even if we see the HW has started before we
process its ack, when we return the execlists state is well defined.

Fixes: 06289949b8 ("drm/i915/selftests: Check for any sign of request starting in wait_for_submit()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200218211215.1336341-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-02-18 21:12:15 +00:00
parent fbcb52db41
commit d30d3d5f58
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/i915/gt/selftest_lrc.c
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@ -77,11 +77,11 @@ static int wait_for_submit(struct intel_engine_cs *engine,
cond_resched();
intel_engine_flush_submission(engine);
if (i915_request_is_active(rq) &&
!READ_ONCE(engine->execlists.pending[0])) {
tasklet_unlock_wait(&engine->execlists.tasklet);
if (READ_ONCE(engine->execlists.pending[0]))
continue;
if (i915_request_is_active(rq))
return 0;
}
if (i915_request_started(rq)) /* that was quick! */
return 0;