MdeModulePkg/NvmExpressPei: Avoid updating the module-level variable

This commit is out of the scope for BZ-1409. The commit will remove the
call of RegisterForShadow() at the entry point of the driver. By doing so,
the driver is now possible to be executed without being re-loaded into
permanent memory.

Thus, this commit will update the NvmExpressPei driver to avoid updating
the content of a global variable.

Cc: Jian J Wang <jian.j.wang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/MdeModulePkg/Bus/Pci/NvmExpressPei/NvmExpressPei.c b/MdeModulePkg/Bus/Pci/NvmExpressPei/NvmExpressPei.c
index fabec37e36..2fe73e942c 100644
--- a/MdeModulePkg/Bus/Pci/NvmExpressPei/NvmExpressPei.c
+++ b/MdeModulePkg/Bus/Pci/NvmExpressPei/NvmExpressPei.c
@@ -2,7 +2,7 @@
   The NvmExpressPei driver is used to manage non-volatile memory subsystem

   which follows NVM Express specification at PEI phase.

 

-  Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2018 - 2019, Intel Corporation. All rights reserved.<BR>

 

   This program and the accompanying materials

   are licensed and made available under the terms and conditions

@@ -215,13 +215,6 @@ NvmExpressPeimEntry (
   EFI_PHYSICAL_ADDRESS                     DeviceAddress;

 

   //

-  // Shadow this PEIM to run from memory

-  //

-  if (!EFI_ERROR (PeiServicesRegisterForShadow (FileHandle))) {

-    return EFI_SUCCESS;

-  }

-

-  //

   // Locate the NVME host controller PPI

   //

   Status = PeiServicesLocatePpi (

@@ -235,8 +228,6 @@ NvmExpressPeimEntry (
     return EFI_UNSUPPORTED;

   }

 

-  IoMmuInit ();

-

   Controller = 0;

   MmioBase   = 0;

   while (TRUE) {