serial8250_do_pm
serial8250_do_pm(port, state, old_state);
serial8250_do_pm(port, state, old_state);
serial8250_do_pm(port, state, old_state);
serial8250_do_pm(port, state, old);
serial8250_do_pm(port, state, old);
EXPORT_SYMBOL(serial8250_do_pm);
serial8250_do_pm(port, state, oldstate);
void serial8250_do_pm(struct uart_port *port, unsigned int state,