Btrfs: handle error returns from btrfs_lookup_dir_item()

If btrfs_lookup_dir_item() fails, we should can just let the mount fail
with an error.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 574285c8cbd4623a22fbb70dc7b98537e0a223ec..9ea711430466e29ba1e52175988bc1891ce01fa5 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -360,6 +360,8 @@ static struct dentry *get_default_root(struct super_block *sb,
         */
        dir_id = btrfs_super_root_dir(&root->fs_info->super_copy);
        di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0);
+       if (IS_ERR(di))
+               return ERR_CAST(di);
        if (!di) {
                /*
                 * Ok the default dir item isn't there.  This is weird since