static int omninet_write (struct usb_serial_port *port, const unsigned char *buf, int count);
static int omninet_write_room (struct usb_serial_port *port);
static void omninet_shutdown (struct usb_serial *serial);
static int omninet_write (struct usb_serial_port *port, const unsigned char *buf, int count);
static int omninet_write_room (struct usb_serial_port *port);
static void omninet_shutdown (struct usb_serial *serial);