Although we do check the completion-status of the request before
actually adding a wait on it (either to its submit fence or its
completion dma-fence), we currently do not check before adding it to the
dependency lists.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_request.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 87ca3453140a..436693b12bae 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -665,6 +665,9 @@ i915_gem_request_await_request(struct drm_i915_gem_request *to,
GEM_BUG_ON(to == from);
GEM_BUG_ON(to->timeline == from->timeline);
+ if (i915_gem_request_completed(from))
+ return 0;
+
if (to->engine->schedule) {
ret = i915_priotree_add_dependency(to->i915,
&to->priotree,
--
2.11.0
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