From: Chris Mason <chris.mason@oracle.com>
Date: Mon, 13 Jun 2011 15:28:50 +0000 (-0400)
Subject: Btrfs: check the return value from set_anon_super
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ac08aedfa5d3de0dcb3825b598d16c2e57991f54;p=deliverable%2Flinux.git

Btrfs: check the return value from set_anon_super

Al Viro noticed we weren't checking for set_anon_super failures.  This
adds the required checks.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9f68c6898653..20c111b3fa0d 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1312,7 +1312,9 @@ again:
 	spin_lock_init(&root->cache_lock);
 	init_waitqueue_head(&root->cache_wait);
 
-	set_anon_super(&root->anon_super, NULL);
+	ret = set_anon_super(&root->anon_super, NULL);
+	if (ret)
+		goto fail;
 
 	if (btrfs_root_refs(&root->root_item) == 0) {
 		ret = -ENOENT;