求教：plx9054驱动一卸载后板卡就死掉。

我是一个驱动新手，写了一个9054驱动，但是现在一卸载驱动板子就会死掉。就是卸载掉我写的驱动后，用WinDriver读bar0和bar2的寄存器都是0xffffffff。
通过dbgview查看，卸载的时候有三个irp：IRP_MN_QUERY_DEVICE_RELATIONS、IRP_MN_QUERY_REMOVE_DEVICE和IRP_MN_REMOVE_DEVICE。前两个我都是默认处理，主要的卸载操作都是在第三个irp中做的。
目前我的驱动里没加dma功能，只是读写寄存器，和中断事件。
不知道有人遇到过如此问题吗？请不啬赐教。能提供点思路也不胜感激。
代码如下：

VOID StopDevice(IN PDEVICE_EXTENSION pdx)
{
 //DEVICE_EXTENSION *pdx;
 //pdx = (PDEVICE_EXTENSION)fdo->DeviceExtension;
 //if(!pdx->GotResource)
 // return
 pdx->bStopping = TRUE;
 KeResetEvent(&pdx->StoppingEvent);
 UnlockDevice(pdx); //have to double unlock device
 UnlockDevice(pdx);
 KeWaitForSingleObject(&pdx->StoppingEvent, Executive, KernelMode, FALSE, NULL);
 KdPrint(("all pending I/O completed\n"));
 pdx->bStopping = FALSE;
 //pdx->GotResource = FALSE;
 KdPrint(("device is being stopped...\n"));
 //free all interrupt resource after all IRP have been released
 if(pdx->pInterruptObject != NULL)
 {
  KeSynchronizeExecution(pdx->pInterruptObject, (PKSYNCHRONIZE_ROUTINE)DisablePciInterrupt, (PVOID)pdx);
  IoDisconnectInterrupt(pdx->pInterruptObject);
  pdx->pInterruptObject = NULL;
  KdPrint(("disconnected interrupt resource\n"));
 }
 // Free all the mem map
 if(pdx->MemBar0)
 {
  MmUnmapIoSpace(pdx->MemBar0, pdx->nMem0);
  pdx->MemBar0 = NULL;
  pdx->nMem0 = 0;
  KdPrint(("Free bar0\n"));
 }
 if(pdx->MemBar2)
 {
  MmUnmapIoSpace(pdx->MemBar2, pdx->nMem2);
  pdx->MemBar2 = NULL;
  pdx->nMem2 = 0;
  KdPrint(("Free bar2\n"));
 }
 //Free DMA Common Buffer here
 //Bump usage count back up again
 LockDevice(pdx);
 LockDevice(pdx);
 KdPrint(("device have been stopped.\n"));
}

#pragma PAGEDCODE
NTSTATUS PnpRemoveDeviceHandler(PDEVICE_EXTENSION pdx, PIRP Irp)
{
 PAGED_CODE();
 KdPrint(("Enter PnpRemoveDeviceHandler\n"));
 StopDevice(pdx);
 Irp->IoStatus.Status = STATUS_SUCCESS;
 // let lower-level drivers handle this request & ignore the result
 NTSTATUS status = PnpDefaultHandler(pdx, Irp);
 IoSetDeviceInterfaceState(&pdx->interfaceName, FALSE);
 RtlFreeUnicodeString(&pdx->interfaceName);
    // detach device from the device object stack
    if (pdx->pNextStackDevice)
        IoDetachDevice(pdx->pNextStackDevice);
 
    //delete the functional device object
    IoDeleteDevice(pdx->fdo);
 //delete interrupt resource
 /*if(pdx->pInterruptObject != NULL)
 {
  IoDisconnectInterrupt(pdx->pInterruptObject);
 }*/
 KdPrint(("Leave PnpRemoveDeviceHandler\n"));
 return status;
}

自己顶一下。

自己再顶。

你死机的意思是蓝屏，还是系统hang住？

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是屏幕卡死了，并没有蓝屏的情况吗？