1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 18af923093c3..817169cbb245 100644
--- a/drivers/char/nozomi.c
+++ b/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;