diff options
| -rw-r--r-- | drivers/char/moxa.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 4a4cab73d0be..65b6ff2442c6 100644 --- 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; |