[PATCH] SecurityPkg/TcgDxe: Refine to compare 2 values with the same type

[Hao Wu <hao.a.wu@intel.com>]

Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
---
 SecurityPkg/Tcg/TcgDxe/TcgDxe.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/SecurityPkg/Tcg/TcgDxe/TcgDxe.c b/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
index f7bf79a..5b7c5c3 100644
--- a/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
+++ b/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
@@ -8,7 +8,7 @@ buffer overflow, integer overflow.
 
 TcgDxePassThroughToTpm() will receive untrusted input and do basic validation.
 
-Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials 
 are licensed and made available under the terms and conditions of the BSD License 
@@ -395,7 +395,7 @@ TpmCommLogEvent (
   //
   // Prevent Event Overflow
   //
-  if (NewEventHdr->EventSize > (UINTN)(~0) - sizeof (*NewEventHdr)) {
+  if ((UINTN) NewEventHdr->EventSize > MAX_UINTN - sizeof (*NewEventHdr)) {
     return EFI_OUT_OF_RESOURCES;
   }
 
-- 
1.9.5.msysgit.0