port->write_urb_busy = 0; 
static void omninet_write_bulk_callback (struct urb *urb, struct pt_regs *regs){/*	struct omninet_header	*header = (struct omninet_header  *) urb->transfer_buffer; */	struct usb_serial_port 	*port   = (struct usb_serial_port *) urb->context;//	dbg("omninet_write_bulk_callback, port %0x\n", port);	if (urb->status) {		dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);		return;	}	schedule_work(&port->work);//	dbg("omninet_write_bulk_callback, tty %0x\n", tty);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/507ca9bc0476662f3463888d583864834eab1e11/omninet.c/buggy/drivers/usb/serial/omninet.c