From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 18 Apr 2012 06:59:03 +0000 (+0300)
Subject: Btrfs: double unlock bug in error handling
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=253beebd5a255e07d6a8b65515491f33664e82a2;p=openwrt%2Fstaging%2Fblogic.git

Btrfs: double unlock bug in error handling

The caller expects this function to return with the lock held and
releases it immediately on error.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2b35f8d14bb9..a0bb9dcd3c36 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2301,6 +2301,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
 
 				if (ret) {
 					printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret);
+					spin_lock(&delayed_refs->lock);
 					return ret;
 				}
 
@@ -2331,6 +2332,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
 
 		if (ret) {
 			printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret);
+			spin_lock(&delayed_refs->lock);
 			return ret;
 		}