1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 7992dc4ea4cc..5d6010ba8b7e 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -650,6 +650,7 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
                 new_device->writeable = 0;
                 new_device->in_fs_metadata = 0;
                 new_device->can_discard = 0;
+                spin_lock_init(&new_device->io_lock);
                 list_replace_rcu(&device->dev_list, &new_device->dev_list);
 
                 call_rcu(&device->rcu, free_device);