/* get the number of ports of the hub */
if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
&hub_info, size, &hub_info, size, &size, NULL))
/* get the number of ports of the hub */
if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
&hub_info, size, &hub_info, size, &size, NULL))