btrfs: add missing spin_unlock to a rare exit path

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index ef6865c..fe5aec9 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2903,6 +2903,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 
        spin_lock(&delayed_refs->lock);
        if (delayed_refs->num_entries == 0) {
+               spin_unlock(&delayed_refs->lock);
                printk(KERN_INFO "delayed_refs has NO entry\n");
                return ret;
        }