ocfs2: Unlock mutex in local alloc failure case

The fs was not unlocking the local alloc inode mutex in the code path in
which it failed to find a window of free bits in the global bitmap.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/localalloc.c

@@ -514,8 +514,10 @@ int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb,
 	ac->ac_bh = osb->local_alloc_bh;
 	status = 0;
 bail:
-	if (status < 0 && local_alloc_inode)
+	if (status < 0 && local_alloc_inode) {
+		mutex_unlock(&local_alloc_inode->i_mutex);
 		iput(local_alloc_inode);
+	}
 
 	mlog_exit(status);
 	return status;