btrfs: fix error labels in init_btrfs_fs

btrfs_interface_init rarely fails but we could leak the prelim_ref slab.

Signed-off-by: David Sterba <dsterba@suse.cz>
(cherry picked from commit af13b4922b057b4ebc7e2315a6f666ecb65890e4)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6ece313439362fbaad5cc5e1619b0e7b4f395a3d..42aaa73f3f90723ac3e42a21c19939e4096fd171 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1999,11 +1999,11 @@ static int __init init_btrfs_fs(void)
 
        err = btrfs_prelim_ref_init();
        if (err)
-               goto free_prelim_ref;
+               goto free_delayed_ref;
 
        err = btrfs_end_io_wq_init();
        if (err)
-               goto free_delayed_ref;
+               goto free_prelim_ref;
 
        err = btrfs_interface_init();
        if (err)