linux-ext4 - [PATCH] ext4: fix missing unlock on error in collapse range

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Date:	Tue, 27 May 2014 09:09:15 +0900
From:	Namjae Jeon <namjae.jeon@...sung.com>
To:	Theodore Ts'o <tytso@....edu>
Cc:	'Dan Carpenter' <dan.carpenter@...cle.com>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	Ashish Sangwan <a.sangwan@...sung.com>
Subject: [PATCH] ext4: fix missing unlock on error in collapse range

Add i_write_mutex unlock on the error handling path in collapse_range().

Cc: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@...sung.com>
---
 fs/ext4/extents.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ee14768..0c93423 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5447,8 +5447,10 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 	/* Write out all dirty pages */
 	ret = filemap_write_and_wait_range(inode->i_mapping, ioffset,
 					   LLONG_MAX);
-	if (ret)
+	if (ret) {
+		mutex_unlock(&EXT4_I(inode)->i_write_mutex);
 		return ret;
+	}
 
 	/* Take mutex lock */
 	mutex_lock(&inode->i_mutex);
-- 
1.7.11-rc0

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