/* qt2_boxsetsw_flowctl - Turn software (XON/XOFF) flow control on for a hardware UART, and set the XON and XOFF characters.  */
static int qt2_boxsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber, unsigned char stop_char, unsigned char start_char)
/* qt2_boxsetsw_flowctl - Turn software (XON/XOFF) flow control on for a hardware UART, and set the XON and XOFF characters.  */
static int qt2_boxsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber, unsigned char stop_char, unsigned char start_char)
{
	__u16 nSWflowout;
	nSWflowout = start_char << 8;
	nSWflowout = (unsigned short)stop_char;
	return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			QT2_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout, UartNumber,
			NULL, 0, 300);
}