From 8635eda91ee11690bd8f73b2504ee19431fd6380 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Mon, 25 May 2015 17:30:14 +0800
Subject: [PATCH] Btrfs: add missing free_extent_buffer

read_tree_block may take a reference on the 'eb', a following
free_extent_buffer is necessary.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
---
 fs/btrfs/extent-tree.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e78ab29f8f1b..076fd7484a82 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7981,6 +7981,7 @@ walk_down:
 			eb = read_tree_block(root, child_bytenr, child_gen);
 			if (!eb || !extent_buffer_uptodate(eb)) {
 				ret = -EIO;
+				free_extent_buffer(eb);
 				goto out;
 			}
 
-- 
2.20.1