[PATCH] ext2: fix missing mutex_unlock in error path

[Akinobu Mita]

Add missing mutex_unlock in error path in ext2_quota_write()

Cc: Jan Kara <jack@xxxxxxx>
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
---
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index f983225..5c4afe6 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1395,8 +1395,10 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
 		blk++;
 	}
 out:
-	if (len == towrite)
+	if (len == towrite) {
+		mutex_unlock(&inode->i_mutex);
 		return err;
+	}
 	if (inode->i_size < off+len-towrite)
 		i_size_write(inode, off+len-towrite);
 	inode->i_version++;
--
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