百分求救：wdm USB驱动，两个device总是会互相影响

[ObjLinking]

我的电脑上连了两个USB serial class的device，现在一个拔线之后，另一个的write urb传输也会fail掉，请问各位高手是什么原因？
我看到在OnWriteInterrupt里面两个device object都返回fail，但是我只拔出了一个USB device啊。

NTSTATUS
StartWriteUrb(
PDEVICE_EXTENSION Extension
)
{

// If the interrupt polling IRP is currently running, don't try to start
// it again.
USBD_PIPE_HANDLE PipeHandle;
BOOLEAN startirp;
KIRQL oldirql;
PIRP Irp;
PURB urb;
PIO_STACK_LOCATION stack;

TRACE("Enter StartWriteUrb() size=%d pipehandle=%X\n",Extension->WriteSize,Extension->UsbInterface->Pipes[Extension->DataOutPipe].PipeHandle);

// KeAcquireSpinLock(&Extension->polllock, &oldirql);
if (Extension->writepending)
startirp = FALSE;
else
startirp = TRUE, Extension->writepending = TRUE;
// KeReleaseSpinLock(&Extension->polllock, oldirql);

if (!startirp)
return STATUS_DEVICE_BUSY; // already pending

Irp = Extension->WritingIrp;
urb = Extension->WritingUrb;
PipeHandle = Extension->UsbInterface->Pipes[Extension->DataOutPipe].PipeHandle;

ASSERT(Irp && urb);

// Acquire the remove lock so we can't remove the device while the IRP
// is still active.

// Initialize the URB we use for reading the interrupt pipe

UsbBuildInterruptOrBulkTransferRequest(
urb,
sizeof (struct _URB_BULK_OR_INTERRUPT_TRANSFER),
PipeHandle,
Extension->WriteCurrentChar,
NULL,
Extension->WriteSize,
USBD_TRANSFER_DIRECTION_OUT,
NULL);

// Install "OnInterrupt" as the completion routine for the polling IRP.

IoSetCompletionRoutine(
Irp,
(PIO_COMPLETION_ROUTINE) OnWriteInterrupt,
Extension,
TRUE,
TRUE,
TRUE);

// Initialize the IRP for an internal control request

stack = IoGetNextIrpStackLocation(Irp);
stack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
stack->Parameters.DeviceIoControl.IoControlCode = IOCTL_INTERNAL_USB_SUBMIT_URB;
stack->Parameters.Others.Argument1 = urb;

// This IRP might have been cancelled the last time it was used, in which case
// the cancel flag will still be on. Clear it to prevent USBD from thinking that it's
// been cancelled again! A better way to do this would be to call IoReuseIrp,
// but that function is not declared in WDM.H.

Irp->Cancel = FALSE;

TRACE("Exit StartWriteUrb()\n");

return IoCallDriver(Extension->TopOfStackDeviceObject, Irp);
}

[ObjLinking]

另外pipehandle我查下来也没有共用，两个device用的是不同的pipehandle

[oushengfen]

呵呵,驱动inf与固件中的PID、VID等要统一，两个硬件，要使用不同的即可，还有驱动的GUID或硬描述符，当然也不能一致，否则肯定会有问题的。

[ObjLinking]

谢谢，我发现是因为用了hub，请问ddk编程中需要为hub添加相应的code吗？我不用hub的时候都没问题，hub本身没问题，其他驱动的device运行都没问题

[用户 昵称]

应该考虑hub,虽然俺还不怎么明白usb协议,但是我们公司的产品都要经过几层级联hub进行测试.

[ObjLinking]

解决了，连在hub上windows会发假的错误消息，只能特殊处理规避了。

[tdwang]

我遇到了类似的问题，在一个应用程序里同时烧写两个（或多个）相同的usb设备，当其中一个意外拔出时，会导致别的设备写失败，如果拔出时别的设备的读操作正在进行则没有影响。我用的不是hub，而是pc机上的两个前置usb插口
麻烦你能详细说一下失败的具体原因并且如何避免吗？谢谢了！