diff options
Diffstat (limited to 'drivers/usb/serial')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index cf75beb1251..31d27686151 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -375,6 +375,22 @@ static int serial_chars_in_buffer(struct tty_struct *tty) return count; } +static void serial_wait_until_sent(struct tty_struct *tty, int timeout) +{ + struct usb_serial_port *port = tty->driver_data; + struct usb_serial *serial = port->serial; + + dev_dbg(tty->dev, "%s\n", __func__); + + if (!port->serial->type->wait_until_sent) + return; + + mutex_lock(&serial->disc_mutex); + if (!serial->disconnected) + port->serial->type->wait_until_sent(tty, timeout); + mutex_unlock(&serial->disc_mutex); +} + static void serial_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; @@ -1191,6 +1207,7 @@ static const struct tty_operations serial_ops = { .unthrottle = serial_unthrottle, .break_ctl = serial_break, .chars_in_buffer = serial_chars_in_buffer, + .wait_until_sent = serial_wait_until_sent, .tiocmget = serial_tiocmget, .tiocmset = serial_tiocmset, .get_icount = serial_get_icount, |