power.c

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/*
 * PROJECT:     PCI IDE bus driver extension
 * LICENSE:     See COPYING in the top level directory
 * PURPOSE:     Power support functions
 * COPYRIGHT:   Copyright 2023 Dmitry Borisov <di.sean@protonmail.com>
 */
 
#include "pciidex.h"
 
static
NTSTATUS
PciIdeXPdoDispatchPower(
    _In_ PPDO_DEVICE_EXTENSION PdoExtension,
    _In_ PIRP Irp)
{
    NTSTATUS Status;
    PIO_STACK_LOCATION IoStack;
 
    UNREFERENCED_PARAMETER(PdoExtension);
 
    IoStack = IoGetCurrentIrpStackLocation(Irp);
    switch (IoStack->MinorFunction)
    {
        case IRP_MN_SET_POWER:
        case IRP_MN_QUERY_POWER:
            Status = STATUS_SUCCESS;
            Irp->IoStatus.Status = Status;
            break;
 
        default:
            Status = Irp->IoStatus.Status;
            break;
    }
 
    PoStartNextPowerIrp(Irp);
    IoCompleteRequest(Irp, IO_NO_INCREMENT);
    return Status;
}
 
static
NTSTATUS
PciIdeXFdoDispatchPower(
    _In_ PFDO_DEVICE_EXTENSION FdoExtension,
    _In_ PIRP Irp)
{
    PoStartNextPowerIrp(Irp);
    IoSkipCurrentIrpStackLocation(Irp);
    return PoCallDriver(FdoExtension->Common.LowerDeviceObject, Irp);
}
 
NTSTATUS
NTAPI
PciIdeXDispatchPower(
    _In_ PDEVICE_OBJECT DeviceObject,
    _Inout_ PIRP Irp)
{
    PCOMMON_DEVICE_EXTENSION CommonExt = DeviceObject->DeviceExtension;
    NTSTATUS Status;
 
    Status = IoAcquireRemoveLock(&CommonExt->RemoveLock, Irp);
    if (!NT_SUCCESS(Status))
    {
        Irp->IoStatus.Status = Status;
        IoCompleteRequest(Irp, IO_NO_INCREMENT);
 
        return Status;
    }
 
    if (IS_FDO(CommonExt))
        Status = PciIdeXFdoDispatchPower((PVOID)CommonExt, Irp);
    else
        Status = PciIdeXPdoDispatchPower((PVOID)CommonExt, Irp);
 
    IoReleaseRemoveLock(&CommonExt->RemoveLock, Irp);
 
    return Status;
}