btrfs: correctly handle return from ulist_add
ulist_add() can return '1' on sucess, which qgroup_subtree_accounting()
doesn't take into account. As a result, that value can be bubbled up to
callers, causing an error to be printed. Fix this by only returning the
value of ulist_add() when it indicates an error.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 65b62c4..b497498 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1959,6 +1959,7 @@
struct btrfs_qgroup_list *glist;
struct ulist *parents;
int ret = 0;
+ int err;
struct btrfs_qgroup *qg;
u64 root_obj = 0;
struct seq_list elem = {};
@@ -2013,10 +2014,12 @@
* while adding parents of the parents to our ulist.
*/
list_for_each_entry(glist, &qg->groups, next_group) {
- ret = ulist_add(parents, glist->group->qgroupid,
+ err = ulist_add(parents, glist->group->qgroupid,
ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
+ if (err < 0) {
+ ret = err;
goto out_unlock;
+ }
}
ULIST_ITER_INIT(&uiter);
@@ -2028,10 +2031,12 @@
/* Add any parents of the parents */
list_for_each_entry(glist, &qg->groups, next_group) {
- ret = ulist_add(parents, glist->group->qgroupid,
+ err = ulist_add(parents, glist->group->qgroupid,
ptr_to_u64(glist->group), GFP_ATOMIC);
- if (ret < 0)
+ if (err < 0) {
+ ret = err;
goto out_unlock;
+ }
}
}