146  * Clear pending interrupts. THRE is cleared by reading IIR. Data
152 	uint8_t iir, lsr;  in ns8250_clrint()  local
154 	iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
155 	while ((iir & IIR_NOPEND) == 0) {  in ns8250_clrint()
156 		iir &= IIR_IMASK;  in ns8250_clrint()
157 		if (iir == IIR_RLS) {  in ns8250_clrint()
161 		} else if (iir == IIR_RXRDY || iir == IIR_RXTOUT)  in ns8250_clrint()
163 		else if (iir == IIR_MLSC)  in ns8250_clrint()
166 		iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
830 	uint8_t iir, lsr;  in ns8250_bus_ipend()  local
835 	iir = uart_getreg(bas, REG_IIR);  in ns8250_bus_ipend()
837 	if (ns8250->busy_detect && (iir & IIR_BUSY) == IIR_BUSY) {  in ns8250_bus_ipend()
842 	if (iir & IIR_NOPEND) {  in ns8250_bus_ipend()
847 	if (iir & IIR_RXRDY) {  in ns8250_bus_ipend()
856 		if (iir & IIR_TXRDY) {  in ns8250_bus_ipend()