From be5903ad1e244cbb0930161fb361ed0b699c4cb8 Mon Sep 17 00:00:00 2001
From: Zhichao Gao <zhichao.gao@intel.com>
Date: Mon, 10 Jun 2019 09:54:52 +0800
Subject: [PATCH] MdeMoudlePkg/CapsulePei: No need to remain space for
 null-terminate

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1853

UnicodeValueToStringS would remain two bytes for the first
parameter to set the null- terminate. So remove this change
in Mu.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Zhichao gao <zhichao.gao@intel.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
---
 MdeModulePkg/Universal/CapsulePei/UefiCapsule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c b/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
index 3ac95b7be6..8d4ae69bb2 100644
--- a/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
+++ b/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
@@ -922,7 +922,7 @@ GetScatterGatherHeadEntries (
     if (Index != 0) {
       UnicodeValueToStringS (
         TempVarName,
-        (sizeof (CapsuleVarName) - ((StrLen (CapsuleVarName) + 1) * sizeof (CHAR16))),
+        (sizeof (CapsuleVarName) - ((UINTN)TempVarName - (UINTN)CapsuleVarName)),
         0,
         Index,
         0
-- 
2.39.2