reactos/drivers/usb/usbhub/power.c
2020-01-06 21:16:08 +02:00

802 lines
24 KiB
C

/*
* PROJECT: ReactOS USB Hub Driver
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE: USBHub power handling functions
* COPYRIGHT: Copyright 2017 Vadim Galyant <vgal@rambler.ru>
*/
#include "usbhub.h"
#define NDEBUG
#include <debug.h>
#define NDEBUG_USBHUB_POWER
#include "dbg_uhub.h"
VOID
NTAPI
USBH_CompletePowerIrp(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PIRP Irp,
IN NTSTATUS NtStatus)
{
DPRINT("USBH_CompletePowerIrp: HubExtension - %p, Irp - %p, NtStatus - %lX\n",
HubExtension,
Irp,
NtStatus);
Irp->IoStatus.Status = NtStatus;
PoStartNextPowerIrp(Irp);
if (!InterlockedDecrement(&HubExtension->PendingRequestCount))
{
KeSetEvent(&HubExtension->PendingRequestEvent,
EVENT_INCREMENT,
FALSE);
}
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
VOID
NTAPI
USBH_HubCancelWakeIrp(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PIRP Irp)
{
DPRINT("USBH_HubCancelWakeIrp: HubExtension - %p, Irp - %p\n",
HubExtension,
Irp);
IoCancelIrp(Irp);
if (InterlockedExchange((PLONG)&HubExtension->FdoWaitWakeLock, 1))
{
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = STATUS_CANCELLED;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
}
VOID
NTAPI
USBH_HubESDRecoverySetD3Completion(IN PDEVICE_OBJECT DeviceObject,
IN UCHAR MinorFunction,
IN POWER_STATE PowerState,
IN PVOID Context,
IN PIO_STATUS_BLOCK IoStatus)
{
DPRINT("USBH_HubESDRecoverySetD3Completion ... \n");
KeSetEvent((PRKEVENT)Context,
EVENT_INCREMENT,
FALSE);
}
NTSTATUS
NTAPI
USBH_HubSetD0(IN PUSBHUB_FDO_EXTENSION HubExtension)
{
PUSBHUB_FDO_EXTENSION RootHubDevExt;
NTSTATUS Status;
KEVENT Event;
POWER_STATE PowerState;
DPRINT("USBH_HubSetD0: HubExtension - %p\n", HubExtension);
RootHubDevExt = USBH_GetRootHubExtension(HubExtension);
if (RootHubDevExt->SystemPowerState.SystemState != PowerSystemWorking)
{
Status = STATUS_INVALID_DEVICE_STATE;
return Status;
}
if (HubExtension->HubFlags & USBHUB_FDO_FLAG_WAIT_IDLE_REQUEST)
{
DPRINT("USBH_HubSetD0: HubFlags - %lX\n", HubExtension->HubFlags);
KeWaitForSingleObject(&HubExtension->IdleEvent,
Suspended,
KernelMode,
FALSE,
NULL);
}
KeInitializeEvent(&Event, NotificationEvent, FALSE);
PowerState.DeviceState = PowerDeviceD0;
Status = PoRequestPowerIrp(HubExtension->LowerPDO,
IRP_MN_SET_POWER,
PowerState,
USBH_HubESDRecoverySetD3Completion,
&Event,
NULL);
if (Status == STATUS_PENDING)
{
Status = KeWaitForSingleObject(&Event,
Suspended,
KernelMode,
FALSE,
NULL);
}
while (HubExtension->HubFlags & USBHUB_FDO_FLAG_WAKEUP_START)
{
USBH_Wait(10);
}
return Status;
}
VOID
NTAPI
USBH_IdleCancelPowerHubWorker(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PVOID Context)
{
PUSBHUB_IDLE_PORT_CANCEL_CONTEXT WorkItemIdlePower;
PIRP Irp;
DPRINT("USBH_IdleCancelPowerHubWorker: ... \n");
WorkItemIdlePower = Context;
if (HubExtension &&
HubExtension->CurrentPowerState.DeviceState != PowerDeviceD0 &&
HubExtension->HubFlags & USBHUB_FDO_FLAG_DEVICE_STARTED)
{
USBH_HubSetD0(HubExtension);
}
Irp = WorkItemIdlePower->Irp;
Irp->IoStatus.Status = STATUS_CANCELLED;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
VOID
NTAPI
USBH_HubQueuePortWakeIrps(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PLIST_ENTRY ListIrps)
{
PDEVICE_OBJECT PortDevice;
PUSBHUB_PORT_PDO_EXTENSION PortExtension;
USHORT NumPorts;
USHORT Port;
PIRP WakeIrp;
KIRQL OldIrql;
DPRINT("USBH_HubQueuePortWakeIrps ... \n");
NumPorts = HubExtension->HubDescriptor->bNumberOfPorts;
InitializeListHead(ListIrps);
IoAcquireCancelSpinLock(&OldIrql);
for (Port = 0; Port < NumPorts; ++Port)
{
PortDevice = HubExtension->PortData[Port].DeviceObject;
if (PortDevice)
{
PortExtension = PortDevice->DeviceExtension;
WakeIrp = PortExtension->PdoWaitWakeIrp;
PortExtension->PdoWaitWakeIrp = NULL;
if (WakeIrp)
{
DPRINT1("USBH_HubQueuePortWakeIrps: UNIMPLEMENTED. FIXME\n");
DbgBreakPoint();
}
}
}
IoReleaseCancelSpinLock(OldIrql);
}
VOID
NTAPI
USBH_HubCompleteQueuedPortWakeIrps(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PLIST_ENTRY ListIrps,
IN NTSTATUS NtStatus)
{
DPRINT("USBH_HubCompleteQueuedPortWakeIrps ... \n");
while (!IsListEmpty(ListIrps))
{
DPRINT1("USBH_HubCompleteQueuedPortWakeIrps: UNIMPLEMENTED. FIXME\n");
DbgBreakPoint();
}
}
VOID
NTAPI
USBH_HubCompletePortWakeIrps(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN NTSTATUS NtStatus)
{
LIST_ENTRY ListIrps;
DPRINT("USBH_HubCompletePortWakeIrps: NtStatus - %x\n", NtStatus);
if (HubExtension->HubFlags & USBHUB_FDO_FLAG_DEVICE_STARTED)
{
USBH_HubQueuePortWakeIrps(HubExtension, &ListIrps);
USBH_HubCompleteQueuedPortWakeIrps(HubExtension,
&ListIrps,
NtStatus);
}
}
VOID
NTAPI
USBH_FdoPoRequestD0Completion(IN PDEVICE_OBJECT DeviceObject,
IN UCHAR MinorFunction,
IN POWER_STATE PowerState,
IN PVOID Context,
IN PIO_STATUS_BLOCK IoStatus)
{
PUSBHUB_FDO_EXTENSION HubExtension;
DPRINT("USBH_FdoPoRequestD0Completion ... \n");
HubExtension = Context;
USBH_HubCompletePortWakeIrps(HubExtension, STATUS_SUCCESS);
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_WAKEUP_START;
if (!InterlockedDecrement(&HubExtension->PendingRequestCount))
{
KeSetEvent(&HubExtension->PendingRequestEvent,
EVENT_INCREMENT,
FALSE);
}
}
VOID
NTAPI
USBH_CompletePortWakeIrpsWorker(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PVOID Context)
{
DPRINT1("USBH_CompletePortWakeIrpsWorker: UNIMPLEMENTED. FIXME\n");
DbgBreakPoint();
}
NTSTATUS
NTAPI
USBH_FdoWWIrpIoCompletion(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context)
{
PUSBHUB_FDO_EXTENSION HubExtension;
NTSTATUS Status;
KIRQL OldIrql;
POWER_STATE PowerState;
PIRP WakeIrp;
DPRINT("USBH_FdoWWIrpIoCompletion: DeviceObject - %p, Irp - %p\n",
DeviceObject,
Irp);
HubExtension = Context;
Status = Irp->IoStatus.Status;
IoAcquireCancelSpinLock(&OldIrql);
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_PENDING_WAKE_IRP;
WakeIrp = InterlockedExchangePointer((PVOID *)&HubExtension->PendingWakeIrp,
NULL);
if (!InterlockedDecrement(&HubExtension->PendingRequestCount))
{
KeSetEvent(&HubExtension->PendingRequestEvent,
EVENT_INCREMENT,
FALSE);
}
IoReleaseCancelSpinLock(OldIrql);
DPRINT("USBH_FdoWWIrpIoCompletion: Status - %lX\n", Status);
if (!NT_SUCCESS(Status))
{
DPRINT1("USBH_FdoWWIrpIoCompletion: DbgBreakPoint() \n");
DbgBreakPoint();
}
else
{
PowerState.DeviceState = PowerDeviceD0;
HubExtension->HubFlags |= USBHUB_FDO_FLAG_WAKEUP_START;
InterlockedIncrement(&HubExtension->PendingRequestCount);
Status = STATUS_SUCCESS;
PoRequestPowerIrp(HubExtension->LowerPDO,
IRP_MN_SET_POWER,
PowerState,
USBH_FdoPoRequestD0Completion,
(PVOID)HubExtension,
NULL);
}
if (!WakeIrp)
{
if (!InterlockedExchange(&HubExtension->FdoWaitWakeLock, 1))
{
Status = STATUS_MORE_PROCESSING_REQUIRED;
}
}
DPRINT("USBH_FdoWWIrpIoCompletion: Status - %lX\n", Status);
if (Status != STATUS_MORE_PROCESSING_REQUIRED)
{
PoStartNextPowerIrp(Irp);
}
return Status;
}
NTSTATUS
NTAPI
USBH_PowerIrpCompletion(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context)
{
PUSBHUB_FDO_EXTENSION HubExtension;
PIO_STACK_LOCATION IoStack;
DEVICE_POWER_STATE OldDeviceState;
NTSTATUS Status;
POWER_STATE PowerState;
DPRINT("USBH_PowerIrpCompletion: DeviceObject - %p, Irp - %p\n",
DeviceObject,
Irp);
HubExtension = Context;
IoStack = IoGetCurrentIrpStackLocation(Irp);
PowerState = IoStack->Parameters.Power.State;
Status = Irp->IoStatus.Status;
DPRINT("USBH_PowerIrpCompletion: Status - %lX\n", Status);
if (!NT_SUCCESS(Status))
{
if (PowerState.DeviceState == PowerDeviceD0)
{
PoStartNextPowerIrp(Irp);
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_SET_D0_STATE;
}
}
else if (PowerState.DeviceState == PowerDeviceD0)
{
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_SET_D0_STATE;
OldDeviceState = HubExtension->CurrentPowerState.DeviceState;
HubExtension->CurrentPowerState.DeviceState = PowerDeviceD0;
DPRINT("USBH_PowerIrpCompletion: OldDeviceState - %x\n", OldDeviceState);
if (HubExtension->HubFlags & USBHUB_FDO_FLAG_HIBERNATE_STATE)
{
DPRINT1("USBH_PowerIrpCompletion: USBHUB_FDO_FLAG_HIBERNATE_STATE. FIXME\n");
DbgBreakPoint();
}
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_HIBERNATE_STATE;
if (OldDeviceState == PowerDeviceD3)
{
DPRINT1("USBH_PowerIrpCompletion: PowerDeviceD3. FIXME\n");
DbgBreakPoint();
}
if (!(HubExtension->HubFlags & USBHUB_FDO_FLAG_DEVICE_STOPPED) &&
HubExtension->HubFlags & USBHUB_FDO_FLAG_DO_ENUMERATION)
{
USBH_SubmitStatusChangeTransfer(HubExtension);
}
DPRINT("USBH_PowerIrpCompletion: Status - %lX\n", Status);
if (Status != STATUS_MORE_PROCESSING_REQUIRED)
{
PoStartNextPowerIrp(Irp);
return Status;
}
}
return Status;
}
VOID
NTAPI
USBH_FdoDeferPoRequestCompletion(IN PDEVICE_OBJECT DeviceObject,
IN UCHAR MinorFunction,
IN POWER_STATE PowerState,
IN PVOID Context,
IN PIO_STATUS_BLOCK IoStatus)
{
PUSBHUB_FDO_EXTENSION Extension;
PUSBHUB_FDO_EXTENSION HubExtension = NULL;
PIRP PowerIrp;
PIO_STACK_LOCATION IoStack;
DPRINT("USBH_FdoDeferPoRequestCompletion ... \n");
Extension = Context;
PowerIrp = Extension->PowerIrp;
if (Extension->Common.ExtensionType == USBH_EXTENSION_TYPE_HUB)
{
HubExtension = Context;
}
IoStack = IoGetCurrentIrpStackLocation(PowerIrp);
if (IoStack->Parameters.Power.State.SystemState == PowerSystemWorking &&
HubExtension && HubExtension->LowerPDO == HubExtension->RootHubPdo)
{
HubExtension->SystemPowerState.SystemState = PowerSystemWorking;
USBH_CheckIdleDeferred(HubExtension);
}
IoCopyCurrentIrpStackLocationToNext(PowerIrp);
PoStartNextPowerIrp(PowerIrp);
PoCallDriver(Extension->LowerDevice, PowerIrp);
}
NTSTATUS
NTAPI
USBH_FdoPower(IN PUSBHUB_FDO_EXTENSION HubExtension,
IN PIRP Irp,
IN UCHAR Minor)
{
NTSTATUS Status;
PIO_STACK_LOCATION IoStack;
POWER_STATE PowerState;
POWER_STATE DevicePwrState;
BOOLEAN IsAllPortsD3;
PUSBHUB_PORT_DATA PortData;
PDEVICE_OBJECT PdoDevice;
PUSBHUB_PORT_PDO_EXTENSION PortExtension;
ULONG Port;
DPRINT_PWR("USBH_FdoPower: HubExtension - %p, Irp - %p, Minor - %X\n",
HubExtension,
Irp,
Minor);
switch (Minor)
{
case IRP_MN_WAIT_WAKE:
DPRINT_PWR("USBH_FdoPower: IRP_MN_WAIT_WAKE\n");
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(Irp,
USBH_FdoWWIrpIoCompletion,
HubExtension,
TRUE,
TRUE,
TRUE);
PoStartNextPowerIrp(Irp);
IoMarkIrpPending(Irp);
PoCallDriver(HubExtension->LowerDevice, Irp);
return STATUS_PENDING;
case IRP_MN_POWER_SEQUENCE:
DPRINT_PWR("USBH_FdoPower: IRP_MN_POWER_SEQUENCE\n");
break;
case IRP_MN_SET_POWER:
DPRINT_PWR("USBH_FdoPower: IRP_MN_SET_POWER\n");
IoStack = IoGetCurrentIrpStackLocation(Irp);
DPRINT_PWR("USBH_FdoPower: IRP_MN_SET_POWER/DevicePowerState\n");
PowerState = IoStack->Parameters.Power.State;
if (IoStack->Parameters.Power.Type == DevicePowerState)
{
DPRINT_PWR("USBH_FdoPower: PowerState - %x\n",
PowerState.DeviceState);
if (HubExtension->CurrentPowerState.DeviceState == PowerState.DeviceState)
{
IoCopyCurrentIrpStackLocationToNext(Irp);
PoStartNextPowerIrp(Irp);
IoMarkIrpPending(Irp);
PoCallDriver(HubExtension->LowerDevice, Irp);
return STATUS_PENDING;
}
switch (PowerState.DeviceState)
{
case PowerDeviceD0:
if (!(HubExtension->HubFlags & USBHUB_FDO_FLAG_SET_D0_STATE))
{
HubExtension->HubFlags &= ~(USBHUB_FDO_FLAG_NOT_D0_STATE |
USBHUB_FDO_FLAG_DEVICE_STOPPING);
HubExtension->HubFlags |= USBHUB_FDO_FLAG_SET_D0_STATE;
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(Irp,
USBH_PowerIrpCompletion,
HubExtension,
TRUE,
TRUE,
TRUE);
}
else
{
IoCopyCurrentIrpStackLocationToNext(Irp);
PoStartNextPowerIrp(Irp);
}
IoMarkIrpPending(Irp);
PoCallDriver(HubExtension->LowerDevice, Irp);
return STATUS_PENDING;
case PowerDeviceD1:
case PowerDeviceD2:
case PowerDeviceD3:
if (HubExtension->ResetRequestCount)
{
IoCancelIrp(HubExtension->ResetPortIrp);
KeWaitForSingleObject(&HubExtension->ResetEvent,
Executive,
KernelMode,
FALSE,
NULL);
}
if (!(HubExtension->HubFlags & USBHUB_FDO_FLAG_DEVICE_STOPPED))
{
HubExtension->HubFlags |= (USBHUB_FDO_FLAG_NOT_D0_STATE |
USBHUB_FDO_FLAG_DEVICE_STOPPING);
IoCancelIrp(HubExtension->SCEIrp);
KeWaitForSingleObject(&HubExtension->StatusChangeEvent,
Executive,
KernelMode,
FALSE,
NULL);
}
HubExtension->CurrentPowerState.DeviceState = PowerState.DeviceState;
if (HubExtension->HubFlags & USBHUB_FDO_FLAG_DO_SUSPENSE &&
USBH_CheckIdleAbort(HubExtension, TRUE, TRUE) == TRUE)
{
HubExtension->HubFlags &= ~(USBHUB_FDO_FLAG_NOT_D0_STATE |
USBHUB_FDO_FLAG_DEVICE_STOPPING);
HubExtension->CurrentPowerState.DeviceState = PowerDeviceD0;
USBH_SubmitStatusChangeTransfer(HubExtension);
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_DO_SUSPENSE;
KeReleaseSemaphore(&HubExtension->IdleSemaphore,
LOW_REALTIME_PRIORITY,
1,
FALSE);
return STATUS_UNSUCCESSFUL;
}
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(Irp,
USBH_PowerIrpCompletion,
HubExtension,
TRUE,
TRUE,
TRUE);
PoStartNextPowerIrp(Irp);
IoMarkIrpPending(Irp);
PoCallDriver(HubExtension->LowerDevice, Irp);
if (HubExtension->HubFlags & USBHUB_FDO_FLAG_DO_SUSPENSE)
{
HubExtension->HubFlags &= ~USBHUB_FDO_FLAG_DO_SUSPENSE;
KeReleaseSemaphore(&HubExtension->IdleSemaphore,
LOW_REALTIME_PRIORITY,
1,
FALSE);
}
return STATUS_PENDING;
default:
DPRINT1("USBH_FdoPower: Unsupported PowerState.DeviceState\n");
DbgBreakPoint();
break;
}
}
else
{
if (PowerState.SystemState != PowerSystemWorking)
{
USBH_GetRootHubExtension(HubExtension)->SystemPowerState.SystemState =
PowerState.SystemState;
}
if (PowerState.SystemState == PowerSystemHibernate)
{
HubExtension->HubFlags |= USBHUB_FDO_FLAG_HIBERNATE_STATE;
}
PortData = HubExtension->PortData;
IsAllPortsD3 = TRUE;
if (PortData && HubExtension->HubDescriptor)
{
for (Port = 0;
Port < HubExtension->HubDescriptor->bNumberOfPorts;
Port++)
{
PdoDevice = PortData[Port].DeviceObject;
if (PdoDevice)
{
PortExtension = PdoDevice->DeviceExtension;
if (PortExtension->CurrentPowerState.DeviceState != PowerDeviceD3)
{
IsAllPortsD3 = FALSE;
break;
}
}
}
}
if (PowerState.SystemState == PowerSystemWorking)
{
DevicePwrState.DeviceState = PowerDeviceD0;
}
else if (HubExtension->HubFlags & USBHUB_FDO_FLAG_PENDING_WAKE_IRP ||
!IsAllPortsD3)
{
DevicePwrState.DeviceState = HubExtension->DeviceState[PowerState.SystemState];
if (DevicePwrState.DeviceState == PowerDeviceUnspecified)
{
goto Exit;
}
}
else
{
DevicePwrState.DeviceState = PowerDeviceD3;
}
if (DevicePwrState.DeviceState != HubExtension->CurrentPowerState.DeviceState &&
HubExtension->HubFlags & USBHUB_FDO_FLAG_DEVICE_STARTED)
{
HubExtension->PowerIrp = Irp;
IoMarkIrpPending(Irp);
if (PoRequestPowerIrp(HubExtension->LowerPDO,
IRP_MN_SET_POWER,
DevicePwrState,
USBH_FdoDeferPoRequestCompletion,
(PVOID)HubExtension,
NULL) == STATUS_PENDING)
{
return STATUS_PENDING;
}
IoCopyCurrentIrpStackLocationToNext(Irp);
PoStartNextPowerIrp(Irp);
PoCallDriver(HubExtension->LowerDevice, Irp);
return STATUS_PENDING;
}
Exit:
HubExtension->SystemPowerState.SystemState = PowerState.SystemState;
if (PowerState.SystemState == PowerSystemWorking)
{
USBH_CheckIdleDeferred(HubExtension);
}
IoCopyCurrentIrpStackLocationToNext(Irp);
PoStartNextPowerIrp(Irp);
return PoCallDriver(HubExtension->LowerDevice, Irp);
}
break;
case IRP_MN_QUERY_POWER:
DPRINT_PWR("USBH_FdoPower: IRP_MN_QUERY_POWER\n");
break;
default:
DPRINT1("USBH_FdoPower: unknown IRP_MN_POWER!\n");
break;
}
IoCopyCurrentIrpStackLocationToNext(Irp);
PoStartNextPowerIrp(Irp);
Status = PoCallDriver(HubExtension->LowerDevice, Irp);
return Status;
}
NTSTATUS
NTAPI
USBH_PdoPower(IN PUSBHUB_PORT_PDO_EXTENSION PortExtension,
IN PIRP Irp,
IN UCHAR Minor)
{
NTSTATUS Status = Irp->IoStatus.Status;
DPRINT_PWR("USBH_FdoPower: PortExtension - %p, Irp - %p, Minor - %X\n",
PortExtension,
Irp,
Minor);
switch (Minor)
{
case IRP_MN_WAIT_WAKE:
DPRINT_PWR("USBHUB_PdoPower: IRP_MN_WAIT_WAKE\n");
PoStartNextPowerIrp(Irp);
break;
case IRP_MN_POWER_SEQUENCE:
DPRINT_PWR("USBHUB_PdoPower: IRP_MN_POWER_SEQUENCE\n");
PoStartNextPowerIrp(Irp);
break;
case IRP_MN_SET_POWER:
DPRINT_PWR("USBHUB_PdoPower: IRP_MN_SET_POWER\n");
PoStartNextPowerIrp(Irp);
break;
case IRP_MN_QUERY_POWER:
DPRINT_PWR("USBHUB_PdoPower: IRP_MN_QUERY_POWER\n");
PoStartNextPowerIrp(Irp);
break;
default:
DPRINT1("USBHUB_PdoPower: unknown IRP_MN_POWER!\n");
PoStartNextPowerIrp(Irp);
break;
}
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return Status;
}