[PATCH 2/2] MdeModulePkg/AtaAtapiPassThru: Revert patch to disable PCI attributes

[Ruiyu Ni <ruiyu.ni@intel.com>]

This patch caused Windows 10 S4 resume failure.
Considering the similar changes are reverted from PciBus driver,
revert the patch from AtaAtapiPassThru as well.

Revert "MdeModulePkg/AtaAtapiPassThru: disable the device
at ExitBootServices()"

This reverts commit 6fb8ddd36bde45614b0a069528cdc97077835a74.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
 .../Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c    | 59 +---------------------
 .../Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h    |  6 ---
 2 files changed, 1 insertion(+), 64 deletions(-)

diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
index 09064dda18..a48b295d26 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
@@ -104,8 +104,7 @@ ATA_ATAPI_PASS_THRU_INSTANCE gAtaAtapiPassThruInstanceTemplate = {
   {                   // NonBlocking TaskList
     NULL,
     NULL
-  },
-  NULL,               // ExitBootEvent
+  }
 };
 
 ATAPI_DEVICE_PATH    mAtapiDevicePathTemplate = {
@@ -479,38 +478,6 @@ InitializeAtaAtapiPassThru (
   return Status;
 }
 
-/**
-  Disable the device (especially Bus Master DMA) when exiting the boot
-  services.
-
-  @param[in] Event    Event for which this notification function is being
-                      called.
-  @param[in] Context  Pointer to the ATA_ATAPI_PASS_THRU_INSTANCE that
-                      represents the HBA.
-**/
-VOID
-EFIAPI
-AtaPassThruExitBootServices (
-  IN EFI_EVENT Event,
-  IN VOID      *Context
-  )
-{
-  ATA_ATAPI_PASS_THRU_INSTANCE *Instance;
-  EFI_PCI_IO_PROTOCOL          *PciIo;
-
-  DEBUG ((DEBUG_VERBOSE, "%a: Context=0x%p\n", __FUNCTION__, Context));
-
-  Instance = Context;
-  PciIo = Instance->PciIo;
-
-  PciIo->Attributes (
-           PciIo,
-           EfiPciIoAttributeOperationDisable,
-           Instance->EnabledPciAttributes,
-           NULL
-           );
-}
-
 /**
   Tests to see if this driver supports a given controller. If a child device is provided,
   it further tests to see if this driver supports creating a handle for the specified child device.
@@ -790,17 +757,6 @@ AtaAtapiPassThruStart (
   InitializeListHead(&Instance->DeviceList);
   InitializeListHead(&Instance->NonBlockingTaskList);
 
-  Status = gBS->CreateEvent (
-                  EVT_SIGNAL_EXIT_BOOT_SERVICES,
-                  TPL_CALLBACK,
-                  AtaPassThruExitBootServices,
-                  Instance,
-                  &Instance->ExitBootEvent
-                  );
-  if (EFI_ERROR (Status)) {
-    goto ErrorExit;
-  }
-
   Instance->TimerEvent = NULL;
 
   Status = gBS->CreateEvent (
@@ -854,10 +810,6 @@ ErrorExit:
     gBS->CloseEvent (Instance->TimerEvent);
   }
 
-  if ((Instance != NULL) && (Instance->ExitBootEvent != NULL)) {
-    gBS->CloseEvent (Instance->ExitBootEvent);
-  }
-
   //
   // Remove all inserted ATA devices.
   //
@@ -956,15 +908,6 @@ AtaAtapiPassThruStop (
     Instance->TimerEvent = NULL;
   }
   DestroyAsynTaskList (Instance, FALSE);
-
-  //
-  // Close event signaled at gBS->ExitBootServices().
-  //
-  if (Instance->ExitBootEvent != NULL) {
-    gBS->CloseEvent (Instance->ExitBootEvent);
-    Instance->ExitBootEvent = NULL;
-  }
-
   //
   // Free allocated resource
   //
diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h
index 8d6eac706c..85e5a55539 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.h
@@ -121,12 +121,6 @@ typedef struct {
   //
   EFI_EVENT                         TimerEvent;
   LIST_ENTRY                        NonBlockingTaskList;
-
-  //
-  // For disabling the device (especially Bus Master DMA) at
-  // ExitBootServices().
-  //
-  EFI_EVENT                         ExitBootEvent;
 } ATA_ATAPI_PASS_THRU_INSTANCE;
 
 //
-- 
2.15.0.gvfs.1.preview.4