USBIP IRP_MJ_CREATE

上层应用通过CreateFile打开驱动时，只有一种情况是需要失败的，那就是当前设备已经被标识为移除，表示驱动已经卸载。

static PAGEABLE NTSTATUS
vhci_create(__in PDEVICE_OBJECT devobj, __in PIRP Irp)
{
    pvdev_t    vdev = DEVOBJ_TO_VDEV(devobj);

    PAGED_CODE();

    DBGI(DBG_GENERAL, "vhci_create(%s): Enter\n", dbg_vdev_type(vdev->type));

    // Check to see whether the bus is removed
    if (vdev->DevicePnPState == Deleted) {
        DBGW(DBG_GENERAL, "vhci_create(%s): no such device\n", dbg_vdev_type(vdev->type));

        Irp->IoStatus.Status = STATUS_NO_SUCH_DEVICE;
        IoCompleteRequest(Irp, IO_NO_INCREMENT);
        return STATUS_NO_SUCH_DEVICE;
    }

    Irp->IoStatus.Information = 0;
    Irp->IoStatus.Status = STATUS_SUCCESS;
    IoCompleteRequest(Irp, IO_NO_INCREMENT);

    DBGI(DBG_GENERAL, "vhci_create(%s): Leave\n", dbg_vdev_type(vdev->type));

    return STATUS_SUCCESS;
}