From 120e27d76fb5748db1160baf1efe0ceef59452f0 Mon Sep 17 00:00:00 2001
From: chandan <chandan@linux.vnet.ibm.com>
Date: Fri, 20 Sep 2013 23:52:11 +0530
Subject: [PATCH] btrfs-progs: clear_extent_bits: Fix memory leak.

The 'prealloc' extent_state structure is leaked for the case when the 'desired
range' encapsulates/covers the 'extent range'.

Signed-off-by: chandan <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---
 extent_io.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/extent_io.c b/extent_io.c
index acc4702..1c481d5 100644
--- a/extent_io.c
+++ b/extent_io.c
@@ -210,9 +210,11 @@ int clear_extent_bits(struct extent_io_tree *tree, u64 start,
 	int set = 0;
 
 again:
-	prealloc = alloc_extent_state();
-	if (!prealloc)
-		return -ENOMEM;
+	if (!prealloc) {
+		prealloc = alloc_extent_state();
+		if (!prealloc)
+			return -ENOMEM;
+	}
 
 	/*
 	 * this search will find the extents that end after
-- 
2.7.4