uch receive_echo_polled(void)
static uch receive_echo_polled(void)
uch receive_echo_polled(void){	int loop = POLLOOP;	while (!(inw(r_line_status) & ls_receive_buffer_full) && loop > 0) {		mdelay(1);		--loop;	}	return ((uch) inw(r_uart_receive));}