请教：一启用USB驱动程序就死机

  编写的USB驱动程序，主要的例程是Read(KIrp)和Write(KIrp)以及读写完成例程，打开应用程序，写数据ok,但一读数据电脑就黑屏重启，我的读写数据都是通过端点2，一个pipein一个pipeout, 请教各位大侠是什么原因,我想用 softIce调试，一设置好它，重启电脑就启动不起来，好郁闷

代码如下，一从USB设备读数据就死机，写数据ok,请各位大侠帮忙分析分析原因,先谢谢各位大侠了
NTSTATUS Test11Device::Read(KIrp I)
{
    T.Trace(TraceInfo, __FUNCTION__"++.  IRP %p\n", I);

    NTSTATUS status = STATUS_SUCCESS;

    // TODO: Validate the parameters of the IRP.  Replace "FALSE"
    //         in the following line with error checking code that
    //         evaulates to TRUE if the request is not valid.
    if (FALSE)
    {
        status = STATUS_INVALID_PARAMETER;
        I.Information() = 0;
        I.PnpComplete(status);

        T.Trace(TraceWarning, __FUNCTION__"--.  IRP %p, STATUS %x\n", I, status);

        return status;
    }

    // Always ok to read 0 elements
    if (I.ReadSize() == 0)
    {
        I.Information() = 0;
        I.PnpComplete(this, status);

        T.Trace(TraceInfo, __FUNCTION__"--.  IRP %p, STATUS %x\n", I, status);

        return status;
    }

    KMemory Mem(I.Mdl());

    ULONG dwTotalSize = I.ReadSize(CURRENT);
    ULONG dwMaxSize = PipeIn.MaximumTransferSize();

    // If the total requested read size is greater than the Maximum Transfer
    // Size for the Pipe, request to read only the Maximum Transfer Size since
    // the bus driver will fail an URB with a TransferBufferLength of greater
    // than the Maximum Transfer Size.
    if (dwTotalSize > dwMaxSize)
    {
        ASSERT(dwMaxSize);
        dwTotalSize = dwMaxSize;
    }

    // Allocate a new context structure for Irp completion
    USB_COMPLETION_INFO* pCompInfo = new (NonPagedPool) USB_COMPLETION_INFO;
    if (pCompInfo == NULL)
    {
        I.Information() = 0;
        return I.PnpComplete(this, STATUS_INSUFFICIENT_RESOURCES);
    }

// TODO:    Select the correct pipe to read from

    // Create an URB to do actual Bulk read from the pipe
    PURB pUrb = PipeIn.BuildBulkTransfer(
                    Mem,              // Where is data coming from?
                    dwTotalSize,      // How much data to read?
                    TRUE,             // direction (TRUE = IN)
                    NULL,            // Link to next URB
                    TRUE            // Allow a short transfer
                    );                

    if (pUrb == NULL)
    {
        delete pCompInfo;
        I.Information() = 0;
        return I.PnpComplete(this, STATUS_INSUFFICIENT_RESOURCES);
    }

    // Initialize context structure
    pCompInfo->m_pClass = this;
    pCompInfo->m_pUrb = pUrb;

    // Submit the URB to our USB device
    status = PipeIn.SubmitUrb(I, pUrb, LinkTo(ReadComplete), pCompInfo, 0);
    return status;
}

NTSTATUS Test11Device::ReadComplete(KIrp I, USB_COMPLETION_INFO* pContext)
{
    // Normal completion routine code to propagate pending flag

    if (I->PendingReturned)
    {
        I.MarkPending();
    }
    
    NTSTATUS status = I.Status();
    PURB pUrb = pContext->m_pUrb;
    ULONG nBytesRead = 0;

    if ( NT_SUCCESS(status) )
    {
        nBytesRead = pUrb->UrbBulkOrInterruptTransfer.TransferBufferLength;
        if (nBytesRead > 0)
            T << "Read() got " << nBytesRead<< " bytes from USB\n";
    }

    // Deallocate Urb and context structure
    delete pUrb;
    delete pContext;

    // set returned count
    I.Information() = nBytesRead;
//    I.PnpComplete(this, STATUS_SUCCESS);
    
    // Plug and Play accounting
    DecrementOutstandingRequestCount();

    // allow IRP completion processing
    return STATUS_SUCCESS;
}

你在DRIVERSTDIO的SETTING里把softice设置一下，如果死机重起请按ESC进入DRIVERSTDIO设置环境按D键就可以进去了

我设置好softIce后重新启动计算机，就黑屏，按什么都没反应，设置好不重起按ctrl+d就黑屏，再按ctrl+d就推出，一调试就黑屏或花屏，我装的是ds3.2，系统是XP Professional,sp2