From 73692710d50da1f421b0e6ddff784ca3135389b3 Mon Sep 17 00:00:00 2001
From: Dandan Bi <dandan.bi@intel.com>
Date: Sat, 1 Apr 2017 10:31:14 +0800
Subject: [PATCH] MdeModulePkg/UefiHiiLib:Fix incorrect comparison expression

Fix the incorrect comparison between pointer and constant zero character.

https://bugzilla.tianocore.org/show_bug.cgi?id=416

V2: The pointer StringPtr points to a string returned
by ExtractConfig/ExportConfig, if it is NULL, function
InternalHiiIfrValueAction will return FALSE. So in
current usage model, the StringPtr can not be NULL before
using it, so we can add ASSERT here.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
---
Upstream-Status: Backport

 MdeModulePkg/Library/UefiHiiLib/HiiLib.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Index: git/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
===================================================================
--- git.orig/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
+++ git/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
@@ -2180,6 +2180,8 @@ InternalHiiIfrValueAction (
   }
   
   StringPtr = ConfigAltResp;
+
+  ASSERT (StringPtr != NULL);
   
   while (StringPtr != L'\0') {
     //