* We only do this from uart_start 
* Re-enable the transmitter if we disabled it. 
static void serial8250_start_tx(struct uart_port *port, unsigned int tty_start){	struct uart_8250_port *up = (struct uart_8250_port *)port;	if (!(up->ier & UART_IER_THRI)) {		up->ier |= UART_IER_THRI;		serial_out(up, UART_IER, up->ier);		if (up->bugs & UART_BUG_TXEN) {			unsigned char lsr, iir;			lsr = serial_in(up, UART_LSR);			iir = serial_in(up, UART_IIR);			if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT)				transmit_chars(up);		}	}	/*	 * We only do this from uart_start	 */	if (tty_start && up->port.type == PORT_16C950) {		up->acr &= ~UART_ACR_TXDIS;		serial_icr_write(up, UART_ACR, up->acr);	}}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/e763b90c41563a0f8258d379fe71a9a1f1fa5445/8250.c/buggy/drivers/serial/8250.c