diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/opticon.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index 82cc9d202b8..d31e997ebd2 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -401,8 +401,6 @@ static int opticon_tiocmget(struct tty_struct *tty) int result = 0; dbg("%s - port %d", __func__, port->number); - if (!usb_get_intfdata(port->serial->interface)) - return -ENODEV; spin_lock_irqsave(&priv->lock, flags); if (priv->rts) @@ -419,13 +417,13 @@ static int opticon_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; + struct usb_serial *serial = port->serial; struct opticon_private *priv = usb_get_serial_data(port->serial); unsigned long flags; bool rts; bool changed = false; + int ret; - if (!usb_get_intfdata(port->serial->interface)) - return -ENODEV; /* We only support RTS so we only handle that */ spin_lock_irqsave(&priv->lock, flags); @@ -441,7 +439,14 @@ static int opticon_tiocmset(struct tty_struct *tty, return 0; /* Send the new RTS state to the connected device */ - return send_control_msg(port, CONTROL_RTS, !rts); + mutex_lock(&serial->disc_mutex); + if (!serial->disconnected) + ret = send_control_msg(port, CONTROL_RTS, !rts); + else + ret = -ENODEV; + mutex_unlock(&serial->disc_mutex); + + return ret; } static int get_serial_info(struct opticon_private *priv, |