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drm/i915: Markup potential lock for i915_active

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Make the lockchains more deterministic via i915_active by flagging the
potential lock.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190703091726.11690-7-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-07-03 10:17:18 +01:00
parent c03467ba40
commit d650d1f5cf
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_active.c
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@ -268,6 +268,8 @@ int i915_active_wait(struct i915_active *ref)
int err;
might_sleep();
might_lock(&ref->mutex);
if (RB_EMPTY_ROOT(&ref->tree))
return 0;