port->write_urb_busy = 0; 
static void keyspan_pda_write_bulk_callback (struct urb *urb, struct pt_regs *regs){	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;	struct keyspan_pda_private *priv;	priv = usb_get_serial_port_data(port);	/* queue up a wakeup at scheduler time */	schedule_work(&priv->wakeup_work);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/507ca9bc0476662f3463888d583864834eab1e11/keyspan_pda.c/buggy/drivers/usb/serial/keyspan_pda.c