drm/i915: Markup potential lock for i915_active

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
mariux64 · Jul 3, 2019 · d650d1f · d650d1f
1 parent c03467b
commit d650d1f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
@@ -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;