From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Tue, 28 May 2013 15:47:22 +0000 (+0000)
Subject: Btrfs: fix memory patcher through fs_info->qgroup_ulist
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4373519db4dbca05341a60b28f6e159b106e4c4b;p=openwrt%2Fstaging%2Fblogic.git

Btrfs: fix memory patcher through fs_info->qgroup_ulist

Commit 5b7c665e introduced fs_info->qgroup_ulist, that is allocated during
btrfs_read_qgroup_config and meant to be used later by the qgroup accounting
code. However, it is always freed before btrfs_read_qgroup_config returns,
becuase the commit mentioned above adds a check for (ret), where a check
for (ret < 0) would have been the right choice. This commit fixes the check.

Cc: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index d059d86c3131..74b432d0b703 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -430,7 +430,7 @@ out:
 	}
 	btrfs_free_path(path);
 
-	if (ret)
+	if (ret < 0)
 		ulist_free(fs_info->qgroup_ulist);
 
 	return ret < 0 ? ret : 0;