power.cpp

来自「The PCI Local bus concept was developed 」· C++ 代码 · 共 53 行

/*

Power.cpp

Sheldon Instruments, Inc.

Abstract:

	Power processors for WDM driver.  Handles calls to IRP_MJ_POWER.

Revision History:

	04Dec1998 - created by Robert Updike

*/

#include "driver.h"

/*

Function name:

	Sheldon_ProcessPowerIrp

Routine Description:

    Handles system requests.  Calls to this function are not handled by this driver,
	but passed down to the next level driver.

Arguments:

    fdo - pointer to a functional device object

    Irp -  I/O request being serviced

Return Value:

    NTSTATUS from lower level driver
    STATUS_PENDING if queued for further processing

*/
NTSTATUS Sheldon_ProcessPowerIrp(IN PDEVICE_OBJECT fdo, IN PIRP Irp)
{
	KdPrint(("SIWDM - Entering Sheldon_ProcessPowerIrp: IRP_MJ_POWER\n"));

	PoStartNextPowerIrp(Irp);
	IoSkipCurrentIrpStackLocation(Irp);
	PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension;

	KdPrint(("SIWDM - Exiting Sheldon_ProcessPowerIrp\n"));

	return PoCallDriver(pdx->LowerDeviceObject, Irp);
}