[PATCH] ext4: Add missing unlock to an error path in ext4_quota_write()

[Jan Kara]

When write in ext4_quota_write() fails, we have to properly release
i_mutex. One error path has been missing the unlock...

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/ext4/super.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index cb96f12..02bf243 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3337,8 +3337,10 @@ static ssize_t ext4_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);
 		EXT4_I(inode)->i_disksize = inode->i_size;
-- 
1.5.2.4

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