istallion: add missing __devexit marking

[karo-tx-linux.git] / drivers / char / moxa.c

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 4a4cab73d0be176aa640c9717bc7582231b39495..65b6ff2442c6df4edfd839b37752ded8340df9c9 100644 (file)
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -1184,6 +1184,11 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
                return -ENODEV;
        }
 
+       if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
+               mutex_unlock(&moxa_openlock);
+               return -ENODEV;
+       }
+
        ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
        ch->port.count++;
        tty->driver_data = ch;