Ejemplo n.º 1
0
NTSTATUS
PopSetSystemPowerStateTraverse(PDEVICE_NODE DeviceNode,
                               PVOID Context)
{
    PPOWER_STATE_TRAVERSE_CONTEXT PowerStateContext = Context;
    NTSTATUS Status;

    DPRINT("PopSetSystemPowerStateTraverse(%p, %p)\n", DeviceNode, Context);

    if (DeviceNode == IopRootDeviceNode)
        return STATUS_SUCCESS;

    if (DeviceNode->PhysicalDeviceObject == PowerStateContext->PowerDevice)
        return STATUS_SUCCESS;

    if (DeviceNode->Flags & DNF_LEGACY_DRIVER)
        return STATUS_SUCCESS;

    Status = PopSendSetSystemPowerState(DeviceNode->PhysicalDeviceObject,
                                        PowerStateContext->SystemPowerState,
                                        PowerStateContext->PowerAction);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Device '%wZ' failed IRP_MN_SET_POWER\n", &DeviceNode->InstancePath);
    }

#if 0
    return Status;
#else
    return STATUS_SUCCESS;
#endif
}
Ejemplo n.º 2
0
NTSTATUS
NTAPI
PopSetSystemPowerState(SYSTEM_POWER_STATE PowerState, POWER_ACTION PowerAction)
{
    PDEVICE_OBJECT DeviceObject;
    PDEVICE_OBJECT Fdo;
    NTSTATUS Status;
    DEVICETREE_TRAVERSE_CONTEXT Context;
    POWER_STATE_TRAVERSE_CONTEXT PowerContext;

    Status = IopGetSystemPowerDeviceObject(&DeviceObject);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("No system power driver available\n");
        Fdo = NULL;
    }
    else
    {
        Fdo = IoGetAttachedDeviceReference(DeviceObject);
        if (Fdo == DeviceObject)
        {
            DPRINT("An FDO was not attached\n");
            return STATUS_UNSUCCESSFUL;
        }
    }

    /* Set up context */
    PowerContext.PowerAction = PowerAction;
    PowerContext.SystemPowerState = PowerState;
    PowerContext.PowerDevice = Fdo;

    /* Query for system power change */
    IopInitDeviceTreeTraverseContext(&Context,
                                     IopRootDeviceNode,
                                     PopQuerySystemPowerStateTraverse,
                                     &PowerContext);

    Status = IopTraverseDeviceTree(&Context);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Query system power state failed; changing state anyway\n");
    }

    /* Set system power change */
    IopInitDeviceTreeTraverseContext(&Context,
                                     IopRootDeviceNode,
                                     PopSetSystemPowerStateTraverse,
                                     &PowerContext);

    IopTraverseDeviceTree(&Context);

    if (!PopAcpiPresent) return STATUS_NOT_IMPLEMENTED;

    if (Fdo != NULL)
    {
        if (PowerAction != PowerActionShutdownReset)
            PopSendSetSystemPowerState(Fdo, PowerState, PowerAction);

        ObDereferenceObject(Fdo);
    }

    return Status;
}