1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index adb3cb27d31e..759278fef35a 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -97,6 +97,8 @@ static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
 {
         int ret;
 
+        WARN_ON(*fence);
+
         *fence = drm_syncobj_fence_get(syncobj);
         if (*fence)
                 return 1;
@@ -743,6 +745,9 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
 
         if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
                 for (i = 0; i < count; ++i) {
+                        if (entries[i].fence)
+                                continue;
+
                         drm_syncobj_fence_get_or_add_callback(syncobjs[i],
                                                               &entries[i].fence,
                                                               &entries[i].syncobj_cb,