SC16IS7XX_THREAD_EXIT
sc->sc_thread_state != SC16IS7XX_THREAD_EXIT) {
sc->sc_thread_state = SC16IS7XX_THREAD_EXIT;
while (sc->sc_thread_state != SC16IS7XX_THREAD_EXIT) {
psc->sc_thread_state != SC16IS7XX_THREAD_EXIT &&
psc->sc_thread_state != SC16IS7XX_THREAD_EXIT &&