The urb callback


static void read_int_callback(struct urb *urb, struct pt_regs *regs)
{
        struct gotemp *gdev = urb->context;
        struct measurement_packet *measurement = urb->transfer_buffer;
        int retval;

        switch (urb->status) {
        case 0: break;
        case -ECONNRESET:
        case -ENOENT:
        case -ESHUTDOWN:
                /* this urb is terminated, clean up */
                dbg("urb shutting down with status: %d",
                    urb->status);
                return;
        default:
                dbg("nonzero urb status received: %d",
                    __FUNCTION__, urb->status);
                goto exit;
        }