drm/i915: Propagate error from completed fences

We need to preserve fatal errors from fences that are being terminated
as we hook them up.

Fixes: ef4688497512 ("drm/i915: Propagate fence errors")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200506162136.3325-1-chris@chris-wilson.co.uk
(cherry picked from commit 24fe5f2ab2478053d50a3bc629ada895903a5cbc)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index c0df71d..182a299 100644 (file)
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -1017,8 +1017,10 @@ 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, &from->sched);