diff options
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 0b39d013c50..ada400d6594 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -402,10 +402,17 @@ static int serial_ioctl(struct tty_struct *tty, dev_dbg(tty->dev, "%s - cmd 0x%.4x\n", __func__, cmd); - if (port->serial->type->ioctl) - retval = port->serial->type->ioctl(tty, cmd, arg); - else - retval = -ENOIOCTLCMD; + switch (cmd) { + case TIOCMIWAIT: + if (port->serial->type->tiocmiwait) + retval = port->serial->type->tiocmiwait(tty, arg); + break; + default: + if (port->serial->type->ioctl) + retval = port->serial->type->ioctl(tty, cmd, arg); + else + retval = -ENOIOCTLCMD; + } return retval; } |