diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index 2e8ce99d0baa..2c79e8199e3c 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -360,7 +360,8 @@ void drm_legacy_lock_master_cleanup(struct drm_device *dev, struct drm_master *m
 	/*
 	 * Since the master is disappearing, so is the
 	 * possibility to lock.
-	 */	mutex_lock(&dev->struct_mutex);
+	 */
+	mutex_lock(&dev->struct_mutex);
 	if (master->lock.hw_lock) {
 		if (dev->sigdata.lock == master->lock.hw_lock)
 			dev->sigdata.lock = NULL;