diff --git a/[refs] b/[refs]
index 990839feff12..2a60bdae02f6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ad9c7ed0685406fe3cd7f0749b82bf433a39dd9c
+refs/heads/master: 4457d9845927b3c62b6e833be243d21d6ca7df47
diff --git a/trunk/drivers/char/nozomi.c b/trunk/drivers/char/nozomi.c
index 18af923093c3..817169cbb245 100644
--- a/trunk/drivers/char/nozomi.c
+++ b/trunk/drivers/char/nozomi.c
@@ -1743,8 +1743,7 @@ static int ntty_write_room(struct tty_struct *tty)
 	if (dc) {
 		mutex_lock(&port->tty_sem);
 		if (port->port.count)
-			room = port->fifo_ul.size -
-					kfifo_len(&port->fifo_ul);
+			room = kfifo_avail(&port->fifo_ul);
 		mutex_unlock(&port->tty_sem);
 	}
 	return room;