USB: serial: add tiocmiwait subdriver operation
Add tiocmiwait operation to struct usb_serial_driver.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 0b39d01..ada400d 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -402,10 +402,17 @@
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;
}