From: Mark Fasheh Date: Thu, 17 Jul 2014 19:39:04 +0000 (-0700) Subject: btrfs: correctly handle return from ulist_add X-Git-Tag: v4.9.8~5691^2~36 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f90e579c2b391979630b3343de0be65ab1b478ce;p=platform%2Fkernel%2Flinux-rpi3.git 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 Signed-off-by: Chris Mason --- 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 @@ static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans, 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 @@ static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans, * 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 @@ static int qgroup_subtree_accounting(struct btrfs_trans_handle *trans, /* 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; + } } }