Replacing HalGetBusData

 NTSTATUS HtsReadWriteConfig( PDEVICE_OBJECT DeviceObject, ULONG WhichSpace, PVOID Buffer, ULONG Offset, ULONG Length, BOOLEAN ReadConfig) { ASSERT(DeviceObject); ASSERT(Buffer); ASSERT(Length); PIRP Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE); if (!Irp) { return STATUS_INSUFFICIENT_RESOURCES; } Irp->IoStatus.Status = STATUS_NOT_SUPPORTED; KEVENT Event; KeInitializeEvent(&Event, NotificationEvent, FALSE); IoSetCompletionRoutine(Irp,HtsGenericCompletion, &Event, TRUE, TRUE, TRUE); PIO_STACK_LOCATION IoStack = IoGetNextIrpStackLocation(Irp); IoStack->MajorFunction= IRP_MJ_PNP; IoStack->MinorFunction= ReadConfig ? IRP_MN_READ_CONFIG : IRP_MN_WRITE_CONFIG; IoStack->Parameters.ReadWriteConfig.WhichSpace = WhichSpace; IoStack->Parameters.ReadWriteConfig.Buffer = Buffer; IoStack->Parameters.ReadWriteConfig.Offset = Offset; IoStack->Parameters.ReadWriteConfig.Length = Length; if (ReadConfig) { RtlZeroMemory(Buffer, Length); } NTSTATUS Status = IoCallDriver(DeviceObject, Irp); if (Status == STATUS_PENDING) { KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL); Status = Irp->IoStatus.Status; } IoFreeIrp(Irp); return Status; } NTSTATUS HtsGenericCompletion ( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PVOID Context ) { UNREFERENCED_PARAMETER (DeviceObject); KeSetEvent ((PKEVENT) Context, IO_NO_INCREMENT, FALSE); return STATUS_MORE_PROCESSING_REQUIRED; // Keep this IRP } 

NTSTATUS

HtsReadWriteConfig(

    PDEVICE_OBJECT DeviceObject,

    ULONG WhichSpace,

    PVOID Buffer,

    ULONG Offset,

    ULONG Length,

    BOOLEAN ReadConfig)

{

    ASSERT(DeviceObject);

    ASSERT(Buffer);

    ASSERT(Length);

    PIRP Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);

    if (!Irp) {

        return STATUS_INSUFFICIENT_RESOURCES;

    }

    Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;

    KEVENT Event;

    KeInitializeEvent(&Event, NotificationEvent, FALSE);

    IoSetCompletionRoutine(Irp,HtsGenericCompletion,

                           &Event, TRUE, TRUE, TRUE);

    PIO_STACK_LOCATION IoStack = IoGetNextIrpStackLocation(Irp);

    IoStack->MajorFunction= IRP_MJ_PNP;

    IoStack->MinorFunction= ReadConfig ? IRP_MN_READ_CONFIG : IRP_MN_WRITE_CONFIG;

    IoStack->Parameters.ReadWriteConfig.WhichSpace = WhichSpace;

    IoStack->Parameters.ReadWriteConfig.Buffer = Buffer;

    IoStack->Parameters.ReadWriteConfig.Offset = Offset;

    IoStack->Parameters.ReadWriteConfig.Length = Length;

    if (ReadConfig) {

        RtlZeroMemory(Buffer, Length);

    }

    NTSTATUS Status = IoCallDriver(DeviceObject, Irp);

    if (Status == STATUS_PENDING) {

       KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);

       Status = Irp->IoStatus.Status;

    }

    IoFreeIrp(Irp);

    return Status;

}

NTSTATUS

HtsGenericCompletion (

    IN PDEVICE_OBJECT   DeviceObject,

    IN PIRP             Irp,

    IN PVOID            Context

    )

{

    UNREFERENCED_PARAMETER (DeviceObject);   

    KeSetEvent ((PKEVENT) Context, IO_NO_INCREMENT, FALSE);

    return STATUS_MORE_PROCESSING_REQUIRED; // Keep this IRP

}

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