Re: [PATCH 1/1] UefiCpuPkg/MpInitLib: Always initialize the DoDecrement variable

["Liming Gao" <liming.gao@intel.com>]

Tested-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

-----Original Message-----
From: Tom Lendacky <thomas.lendacky@amd.com> 
Sent: 2020年8月18日 21:10
To: devel@edk2.groups.io
Cc: Gao, Liming <liming.gao@intel.com>; Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Laszlo Ersek <lersek@redhat.com>; Kumar, Rahul1 <rahul1.kumar@intel.com>
Subject: [PATCH 1/1] UefiCpuPkg/MpInitLib: Always initialize the DoDecrement variable

From: Tom Lendacky <thomas.lendacky@amd.com>

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2901

The DoDecrement variable in ApWakeupFunction () wasn't always being initialized. Update the code to always fully initialize it.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 UefiCpuPkg/Library/MpInitLib/MpLib.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 90416c81b616..e24bdc64f930 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -885,9 +885,7 @@ ApWakeupFunction (
           UINT64                    Status;
           BOOLEAN                   DoDecrement;
 
-          if (CpuMpData->InitFlag == ApInitConfig) {
-            DoDecrement = TRUE;
-          }
+          DoDecrement = (CpuMpData->InitFlag == ApInitConfig) ? TRUE : 
+ FALSE;
 
           while (TRUE) {
             Msr.GhcbPhysicalAddress = AsmReadMsr64 (MSR_SEV_ES_GHCB);
--
2.28.0