diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 756ac903a19fd..a7b180042a27e 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1155,11 +1155,8 @@ static int close_fs_devices(struct btrfs_fs_devices *fs_devices)
 	if (--fs_devices->opened > 0)
 		return 0;
 
-	mutex_lock(&fs_devices->device_list_mutex);
-	list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list) {
+	list_for_each_entry_safe(device, tmp, &fs_devices->devices, dev_list)
 		btrfs_close_one_device(device);
-	}
-	mutex_unlock(&fs_devices->device_list_mutex);
 
 	WARN_ON(fs_devices->open_devices);
 	WARN_ON(fs_devices->rw_devices);