if (port->write_urb_busy) 
if (!(port->write_urb_busy)) 
int usb_serial_generic_write_room (struct usb_serial_port *port){	struct usb_serial *serial = port->serial;	int room = 0;	dbg("%s - port %d", __FUNCTION__, port->number);	if (serial->num_bulk_out) {		if (port->write_urb_busy)			room = port->bulk_out_size;	}	dbg("%s - returns %d", __FUNCTION__, room);	return (room);}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/7a3ca7d2b5ec31b2cfa594b961d77e68075e33c7/generic.c/buggy/drivers/usb/serial/generic.c