if (port->write_urb->status == -EINPROGRESS) 
if (port->write_urb_busy) 
int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port){	struct usb_serial *serial = port->serial;	int chars = 0;	dbg("%s - port %d", __FUNCTION__, port->number);	if (serial->num_bulk_out) {		if (port->write_urb->status == -EINPROGRESS)			chars = port->write_urb->transfer_buffer_length;	}	dbg("%s - returns %d", __FUNCTION__, chars);	return (chars);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/507ca9bc0476662f3463888d583864834eab1e11/generic.c/buggy/drivers/usb/serial/generic.c