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>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4e1b153b7c47..45c69c4184c9 100644
--- 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);