Tdi Disconnect出现死等

大家好，最近小弟在琢磨TDI，不知道怎么回事，为什么我要断开tcp连接的时候，在KeWaitForSingleObject的时候出现死等？各位能告诉我什么原因吗？谢谢了！

NTSTATUS tdi_disconnect(PFILE_OBJECT connectionFileObject, ULONG flags)
{
    PDEVICE_OBJECT  devObj;
    KEVENT          event;
    PIRP            irp;
    IO_STATUS_BLOCK iosb;
    NTSTATUS        status;
    TDI_CONNECTION_INFORMATION  ReturnConnectionInfo  = {0};

    devObj = IoGetRelatedDeviceObject(connectionFileObject);

    KeInitializeEvent(&event, NotificationEvent, FALSE);

    irp = TdiBuildInternalDeviceControlIrp(TDI_DISCONNECT, devObj, connectionFileObject, &event, &iosb);

    if (irp == NULL)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }

   TdiBuildDisconnect(irp, devObj, connectionFileObject, NULL, NULL, NULL, flags, NULL, &ReturnConnectionInfo);

    status = IoCallDriver(devObj, irp);

    if (status == STATUS_PENDING)
    {
        KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
        status = iosb.Status;
    }

    return status;
}