diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4b8a264e9777..29297e97cdea 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3579,6 +3579,8 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
 			mddev->to_remove = &md_redundancy_group;
 	}
 
+	module_put(oldpers->owner);
+
 	rdev_for_each(rdev, mddev) {
 		if (rdev->raid_disk < 0)
 			continue;