ClabureDB: Classified Bug-Reports Database

        .owner =        THIS_MODULE,
        .open =                sisusb_open,
        .release =        sisusb_release,
        .read =                sisusb_read,
        .write =        sisusb_write,
        .llseek =        sisusb_lseek,
#ifdef SISUSB_NEW_CONFIG_COMPAT
        .compat_ioctl = sisusb_compat_ioctl,
#endif
        .unlocked_ioctl = sisusb_ioctl
};

static struct usb_class_driver usb_sisusb_class = {
        .name =                "sisusbvga%d",
        .fops =                &usb_sisusb_fops,
        .minor_base =        SISUSB_MINOR
};

static int sisusb_probe(struct usb_interface *intf,
                        const struct usb_device_id *id)
{
        struct usb_device *dev = interface_to_usbdev(intf);
        struct sisusb_usb_data *sisusb;
        int retval = 0, i;

        dev_info(&dev->dev, "USB2VGA dongle found at address %d\n",
                dev->devnum);

        /* Allocate memory for our private */
        if (!(sisusb = kzalloc(sizeof(*sisusb), GFP_KERNEL))) {
                dev_err(&sisusb->sisusb_dev->dev, "Failed to allocate memory for private data\n");
                return -ENOMEM;
        }
        kref_init(&sisusb->kref);

        mutex_init(&(sisusb->lock));

        /* Register device */
        if ((retval = usb_register_dev(intf, &usb_sisusb_class))) {
                dev_err(&sisusb->sisusb_dev->dev, "Failed to get a minor for device %d\n",
                        dev->devnum);