diff options
Diffstat (limited to 'drivers/usb/serial/whiteheat.c')
| -rw-r--r-- | drivers/usb/serial/whiteheat.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c index f5033d482ee..38726ef3132 100644 --- a/drivers/usb/serial/whiteheat.c +++ b/drivers/usb/serial/whiteheat.c @@ -658,11 +658,14 @@ static void whiteheat_close(struct usb_serial_port *port, struct file * filp) struct list_head *tmp2; dbg("%s - port %d", __FUNCTION__, port->number); - + + mutex_lock(&port->serial->disc_mutex); /* filp is NULL when called from usb_serial_disconnect */ - if (filp && (tty_hung_up_p(filp))) { + if ((filp && (tty_hung_up_p(filp))) || port->serial->disconnected) { + mutex_unlock(&port->serial->disc_mutex); return; } + mutex_unlock(&port->serial->disc_mutex); port->tty->closing = 1; |