奶奶的，bulkusb 居然得不到pipe信息？？

NTSTATUS
BulkUsb_DispatchCreate(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP           Irp
    )
{
    ULONG                       i;
    NTSTATUS                    ntStatus;
    PFILE_OBJECT                fileObject;
    PDEVICE_EXTENSION           deviceExtension;
    PIO_STACK_LOCATION          irpStack;
    PBULKUSB_PIPE_CONTEXT       pipeContext;
    PUSBD_INTERFACE_INFORMATION interface;

    PAGED_CODE();

    BulkUsb_DbgPrint(1, ("BulkUsb_DispatchCreate - begins\n"));

    //
    // initialize variables
    //
    irpStack = IoGetCurrentIrpStackLocation(Irp);
    fileObject = irpStack->FileObject;
    deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;

    if(deviceExtension->DeviceState != Working) {

        BulkUsb_DbgPrint(1, ("Usb not working\n"));
        ntStatus = STATUS_INVALID_DEVICE_STATE;
        goto BulkUsb_DispatchCreate_Exit;
    }

    if(deviceExtension->UsbInterface) {

        interface = deviceExtension->UsbInterface;
    }
    else {

        BulkUsb_DbgPrint(1, ("UsbInterface not found\n"));

        ntStatus = STATUS_INVALID_DEVICE_STATE;
        goto BulkUsb_DispatchCreate_Exit;
    }

    //
    // FsContext is Null for the device
    //
    if(fileObject) {
        
        fileObject->FsContext = NULL;
    }
    else {

        BulkUsb_DbgPrint(1, ("Usb invalid parameter\n"));
        ntStatus = STATUS_INVALID_PARAMETER;
        goto BulkUsb_DispatchCreate_Exit;
    }

    BulkUsb_DbgPrint(1, ("Filename = %ws\n", fileObject->FileName));

    if(0 == fileObject->FileName.Length) {

        //
        // opening a device as opposed to pipe.
        //
        ntStatus = STATUS_SUCCESS;

        InterlockedIncrement(&deviceExtension->OpenHandleCount);

        //
        // the device is idle if it has no open handles or pending PnP Irps
        // since we just received an open handle request, cancel idle req.
        //
        if(deviceExtension->SSEnable) {
        
            CancelSelectSuspend(deviceExtension);
        }

        BulkUsb_DbgPrint(1, ("Usb filename.length == 0\n"));//////////////到这里就跳转了，得不到pipe信息了，打不开pipe，咋回事？
        goto BulkUsb_DispatchCreate_Exit;
    }
    
    pipeContext = BulkUsb_PipeWithName(DeviceObject, &fileObject->FileName);

    if(pipeContext == NULL) {

        ntStatus = STATUS_INVALID_PARAMETER;
        BulkUsb_DbgPrint(1, ("Usb get pipe failed\n"));
        goto BulkUsb_DispatchCreate_Exit;
    }

    ntStatus = STATUS_INVALID_PARAMETER;

    BulkUsb_DbgPrint(1, ("begin open pipes\n"));
    for(i=0; i<interface->NumberOfPipes; i++) {

        if(pipeContext == &deviceExtension->PipeContext) {

            //
            // found a match
            //
            BulkUsb_DbgPrint(1, ("open pipe %d\n", i));

            fileObject->FsContext = &interface->Pipes;
            
            ASSERT(fileObject->FsContext);

            pipeContext->PipeOpen = TRUE;

            ntStatus = STATUS_SUCCESS;

            //
            // increment OpenHandleCounts
            //
            InterlockedIncrement(&deviceExtension->OpenHandleCount);

            //
            // the device is idle if it has no open handles or pending PnP Irps
            // since we just received an open handle request, cancel idle req.
            //
            if(deviceExtension->SSEnable) {

                CancelSelectSuspend(deviceExtension);
            }
        }
    }

BulkUsb_DispatchCreate_Exit:

    Irp->IoStatus.Status = ntStatus;
    Irp->IoStatus.Information = 0;

    IoCompleteRequest(Irp, IO_NO_INCREMENT);

    BulkUsb_DbgPrint(1, ("BulkUsb_DispatchCreate - ends\n"));
    
    return ntStatus;
}

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        BulkUsb_DbgPrint(1, ("Usb filename.length == 0\n"));//////////////到这里就跳转了，得不到pipe信息了，打不开pipe，咋回事？
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

....例程没看清楚

据说这个例子里面的pipeInformation设置有问题，用fileObject保存pipeHandle没有理由，应该改成用deviceExtension来保存

传入的打开的管道信息为空了，当然会得不到正确的响应。 检查你的参数传递过程吧