btrfs: fix uninitialized return value

When allocation fails in btrfs_read_fs_root_no_name, ret is not set
although it is returned, holding a garbage value.

Signed-off-by: David Sterba <dsterba@suse.cz>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c25ef5a..1ac8db5 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1299,12 +1299,12 @@ again:
                return root;
 
        root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS);
-       if (!root->free_ino_ctl)
-               goto fail;
        root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned),
                                        GFP_NOFS);
-       if (!root->free_ino_pinned)
+       if (!root->free_ino_pinned || !root->free_ino_ctl) {
+               ret = -ENOMEM;
                goto fail;
+       }
 
        btrfs_init_free_ino_ctl(root);
        mutex_init(&root->fs_commit_mutex);