diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 973eb8805ce0db39037ae3a0e17fd1e921bd3c25..f716308fb48cf104acfe76a14321e5b32005f0e5 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -804,12 +804,13 @@ drm_gem_object_free(struct kref *kref)
 		container_of(kref, struct drm_gem_object, refcount);
 	struct drm_device *dev = obj->dev;
 
-	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
-
-	if (dev->driver->gem_free_object_unlocked)
+	if (dev->driver->gem_free_object_unlocked) {
 		dev->driver->gem_free_object_unlocked(obj);
-	else if (dev->driver->gem_free_object)
+	} else if (dev->driver->gem_free_object) {
+		WARN_ON(!mutex_is_locked(&dev->struct_mutex));
+
 		dev->driver->gem_free_object(obj);
+	}
 }
 EXPORT_SYMBOL(drm_gem_object_free);