USBSER_FL_CARR_ON
pp->port_flags |= USBSER_FL_CARR_ON;
pp->port_flags |= USBSER_FL_CARR_ON;
pp->port_flags &= ~USBSER_FL_CARR_ON;
(minor & OUTLINE) || (pp->port_flags & USBSER_FL_CARR_ON)) {
if ((pp->port_flags & USBSER_FL_CARR_ON) == 0) {
pp->port_flags |= USBSER_FL_CARR_ON;
} else if (pp->port_flags & USBSER_FL_CARR_ON) {
pp->port_flags &= ~USBSER_FL_CARR_ON;