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NTSTATUS c2pPnP(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
{
PC2P_DEV_EXT devExt;
PIO_STACK_LOCATION irpStack;
NTSTATUS status = STATUS_SUCCESS;
KIRQL oldIrql;
KEVENT event;
// 获得真实设备。
devExt = (PC2P_DEV_EXT)(DeviceObject->DeviceExtension);
irpStack = IoGetCurrentIrpStackLocation(Irp);
switch (irpStack->MinorFunction)
{
case IRP_MN_START_DEVICE:
KdPrint(("insert Device\n")):
break;
case IRP_MN_REMOVE_DEVICE:
KdPrint(("IRP_MN_REMOVE_DEVICE\n"));
// 首先把请求发下去
IoSkipCurrentIrpStackLocation(Irp);
IoCallDriver(devExt->LowerDeviceObject, Irp);
// 然后解除绑定。
IoDetachDevice(devExt->LowerDeviceObject);
// 删除我们自己生成的虚拟设备。
IoDeleteDevice(DeviceObject);
status = STATUS_SUCCESS;
break;
default:
// 对于其他类型的IRP,全部都直接下发即可。
KdPrint(("Other IRP"\n));
IoSkipCurrentIrpStackLocation(Irp);
status = IoCallDriver(devExt->LowerDeviceObject, Irp);
}
return status;
}