usb_serial_handle_break
usb_serial_handle_break(port);
usb_serial_handle_break(port);
if (usb_serial_handle_break(port))
EXPORT_SYMBOL_GPL(usb_serial_handle_break);
usb_serial_handle_break(port);
usb_serial_handle_break(port);
usb_serial_handle_break(port);
int usb_serial_handle_break(struct usb_serial_port *port);