at linux 5.6.15

Author: dettus

sys/external/bsd/drm2/dist/drm/i915/i915_request.c

@@ -941,8 +941,10 @@ i915_request_await_request(struct i915_request *to, struct i915_request *from)
 	GEM_BUG_ON(to == from);
 	GEM_BUG_ON(to->timeline == from->timeline);
 
-	if (i915_request_completed(from))
+	if (i915_request_completed(from)) {
+		i915_sw_fence_set_error_once(&to->submit, from->fence.error);
 		return 0;
+	}
 
 	if (to->engine->schedule) {
 		ret = i915_sched_node_add_dependency(&to->sched,