PCH_UART_IIR_IP   605 drivers/tty/serial/pch_uart.c 		      (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP);
PCH_UART_IIR_IP  1097 drivers/tty/serial/pch_uart.c 		if (iid & PCH_UART_IIR_IP) /* No Interrupt */