NTSTATUS NTAPI PciSendIoctl	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	IoControlCode,
		IN PVOID	InputBuffer,
		IN ULONG	InputBufferLength,
		IN PVOID	OutputBuffer,
		IN ULONG	OutputBufferLength
	)

Definition at line 531 of file utils.c.

Referenced by PciGetHotPlugParameters(), and PciIsSlotPresentInParentMethod().

{
    PIRP Irp;
    NTSTATUS Status;
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
    PDEVICE_OBJECT AttachedDevice;
    PAGED_CODE();

    /* Initialize the pending IRP event */
    KeInitializeEvent(&Event, SynchronizationEvent, FALSE);

    /* Get a reference to the root PDO (ACPI) */
    AttachedDevice = IoGetAttachedDeviceReference(DeviceObject);
    if (!AttachedDevice) return STATUS_INVALID_PARAMETER;

    /* Build the requested IOCTL IRP */
    Irp = IoBuildDeviceIoControlRequest(IoControlCode,
                                        AttachedDevice,
                                        InputBuffer,
                                        InputBufferLength,
                                        OutputBuffer,
                                        OutputBufferLength,
                                        0,
                                        &Event,
                                        &IoStatusBlock);
    if (!Irp) return STATUS_INSUFFICIENT_RESOURCES;

    /* Send the IOCTL to the driver */
    Status = IoCallDriver(AttachedDevice, Irp);
    if (Status == STATUS_PENDING)
    {
        /* Wait for a response */
        KeWaitForSingleObject(&Event,
                              Executive,
                              KernelMode,
                              FALSE,
                              NULL);
        Status = Irp->IoStatus.Status;
    }

    /* Take away the reference we took and return the result to the caller */
    ObDereferenceObject(AttachedDevice);
    return Status;
}

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