usb2com.sysctrl.cpp

这是一个关于USB转接串口的驱动程序开发

//********************************************************************
//	created:	11:7:2008   21:32
//	file:		usb2com.sysctrl.cpp
//	author:		tiamo
//	purpose:	system control
//********************************************************************

#include "stdafx.h"

//
// system control dispatch routine
//
NTSTATUS Usb2ComSystemControl(__in PDEVICE_OBJECT DeviceObject,__in PIRP Irp)
{
	//
	// we pass this irp down to the lower driver directly
	//
	PUSB2COM_DEVICE_EXTENSION DeviceExtension			= static_cast<PUSB2COM_DEVICE_EXTENSION>(DeviceObject->DeviceExtension);

	IoSkipCurrentIrpStackLocation(Irp);

	return IoCallDriver(DeviceExtension->LowerDeviceObject,Irp);
}