Btrfs: unlock on error in btrfs_delalloc_reserve_metadata()

We should release this mutex before returning the error code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4e1b153b7c47c99e00adffd8ee6d24e2db29093d..45c69c4184c9a6070883ef42e6f3d805a72192eb 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4571,8 +4571,10 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
        if (root->fs_info->quota_enabled) {
                ret = btrfs_qgroup_reserve(root, num_bytes +
                                           nr_extents * root->leafsize);
-               if (ret)
+               if (ret) {
+                       mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
                        return ret;
+               }
        }
 
        ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);