[PATCH 5.12 047/700] btrfs: fix unbalanced unlock in qgroup_account_snapshot()

[Greg Kroah-Hartman]

From: Naohiro Aota <naohiro.aota@xxxxxxx>

commit 44365827cccc1441d4187509257e5276af133a49 upstream.

qgroup_account_snapshot() is trying to unlock the not taken
tree_log_mutex in a error path. Since ret != 0 in this case, we can
just return from here.

Fixes: 2a4d84c11a87 ("btrfs: move delayed ref flushing for qgroup into qgroup helper")
CC: stable@xxxxxxxxxxxxxxx # 5.12+
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/btrfs/transaction.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1461,7 +1461,7 @@ static int qgroup_account_snapshot(struc
 	ret = btrfs_run_delayed_refs(trans, (unsigned long)-1);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
-		goto out;
+		return ret;
 	}
 
 	/*