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drm/i915: Serialise i915_active_wait() with its retirement 

As the i915_active.retire() may be running on another CPU as we detect
that the i915_active is idle, we may not wait for the retirement itself.
Wait for the remote callback by waiting for the retirement worker.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112424
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191202140133.2444217-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-12-02 14:01:33 +00:00
parent ae30300490
commit e1cda6a529
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_active.c
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@ -473,6 +473,7 @@ int i915_active_wait(struct i915_active *ref)
if (wait_var_event_interruptible(ref, i915_active_is_idle(ref)))
return -EINTR;
flush_work(&ref->work);
return 0;
}