431 	struct uart_pmac_port *uap_b;  in pmz_interrupt()  local
437 	uap_b = uap_a->mate;  in pmz_interrupt()
464 	if (!uap_b)  in pmz_interrupt()
467 	spin_lock(&uap_b->port.lock);  in pmz_interrupt()
470 		if (!ZS_IS_OPEN(uap_b)) {  in pmz_interrupt()
474 		write_zsreg(uap_b, R0, RES_H_IUS);  in pmz_interrupt()
475 		zssync(uap_b);  in pmz_interrupt()
477 			pmz_status_handle(uap_b);  in pmz_interrupt()
479 			push = pmz_receive_chars(uap_b);  in pmz_interrupt()
481 			pmz_transmit_chars(uap_b);  in pmz_interrupt()
485 	spin_unlock(&uap_b->port.lock);  in pmz_interrupt()