diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index afaae272347c..2c457ad74f3b 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -454,8 +454,10 @@ void drm_bridge_add(struct drm_bridge *bridge)
 	 * in bridge_lingering_list. Remove it or bridge_lingering_list will be
 	 * corrupted when adding this bridge to bridge_list below.
 	 */
+	mutex_lock(&bridge_lock);
 	if (!list_empty(&bridge->list))
 		list_del_init(&bridge->list);
+	mutex_unlock(&bridge_lock);
 
 	mutex_init(&bridge->hpd_state_mutex);
 	mutex_init(&bridge->hpd_mutex);