hamradio: add missing sanity check to tty operation

Add missing sanity check to tty operation.

Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Eugene Teo <eteo@redhat.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 3249df5e0f179c46582154de56c0e7b7a701a81a..b8e25c4624d2c2db3d6e84bb90e7b7cd55261a6e 100644 (file)
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -548,7 +548,7 @@ static int ax_xmit(struct sk_buff *skb, struct net_device *dev)
                }
 
                printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name,
-                      (ax->tty->ops->chars_in_buffer(ax->tty) || ax->xleft) ?
+                      (tty_chars_in_buffer(ax->tty) || ax->xleft) ?
                       "bad line quality" : "driver error");
 
                ax->xleft = 0;