[PATCH 2/8] btrfs: Fail on removing qgroup if del_qgroup_item fails

[Sargun Dhillon <sargun@sargun.me>]

Previously, we were calling del_qgroup_item, and ignoring the return code
resulting in a potential to have divergent in-memory state without an
error. Perhaps, it makes sense to handle this error code, and put the
filesystem into a read only, or similar state.

This patch only adds reporting of the error.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
---
 fs/btrfs/qgroup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index a2add44..7e772ba 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1303,6 +1303,8 @@ static int __btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
 		return -EBUSY;
 
 	ret = del_qgroup_item(trans, quota_root, qgroupid);
+	if (ret)
+		goto out;
 
 	while (!list_empty(&qgroup->groups)) {
 		list = list_first_entry(&qgroup->groups,
-- 
2.9.3