NTSTATUS HandleNecessaryPropertyInstances	(	IN PIO_STATUS_BLOCK	IoStatus,
		IN PKSIDENTIFIER	Request,
		IN OUT PVOID	Data,
		IN PSUBDEVICE_DESCRIPTOR	Descriptor,
		IN ISubdevice *	SubDevice
	)

Definition at line 66 of file propertyhandler.cpp.

Referenced by PinPropertyHandler().

{
    PULONG Result;
    KSP_PIN * Pin = (KSP_PIN*)Request;
    ULONG FilterNecessary, FilterCurrent, FilterPossible, GlobalCurrent, GlobalPossible;
    NTSTATUS Status;

    if (Pin->PinId >= Descriptor->Factory.PinDescriptorCount)
    {
        IoStatus->Information = 0;
        IoStatus->Status = STATUS_INVALID_PARAMETER;
        return STATUS_INVALID_PARAMETER;
    }

    Result = (PULONG)Data;


    // check if the miniport supports the IPinCount interface
    Status = SubDevice->PinCount(Pin->PinId, &FilterNecessary, &FilterCurrent, &FilterPossible, &GlobalCurrent, &GlobalPossible);

    if (NT_SUCCESS(Status))
    {
        *Result = FilterNecessary;
    }
    else
    {
        *Result = Descriptor->Factory.Instances[Pin->PinId].MinFilterInstanceCount;
    }

    IoStatus->Information = sizeof(ULONG);
    IoStatus->Status = STATUS_SUCCESS;
    return STATUS_SUCCESS;
}

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