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/Linux-v6.6/drivers/tty/serial/8250/
D8250_port.c2335 unsigned char iir1; in serial8250_do_startup() local
2355 iir1 = serial_port_in(port, UART_IIR); in serial8250_do_startup()
2372 if ((!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) || in serial8250_do_startup()