From e02c57b63bfb48327c966adbcb2d25435a5cadcf Mon Sep 17 00:00:00 2001
From: erictian <erictian@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 17 Nov 2011 06:43:01 +0000
Subject: [PATCH] PcAtChipsetPkg: Do right sign extension to avoid a wrong
 daylight value saving into "RTC" variable

signed-off-by: erictian
reviewed-by: niruiyu

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12732 6f19259b-4bc3-4df7-8a09-765794883524
---
 PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
index 882f2ea8cd..f874f3fb8f 100644
--- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
+++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
@@ -1,7 +1,7 @@
 /** @file
   RTC Architectural Protocol GUID as defined in DxeCis 0.96.
 
-Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -414,7 +414,7 @@ PcRtcSetTime (
   Global->Daylight      = Time->Daylight;
 
   TimerVar = Time->Daylight;
-  TimerVar = (UINT32) ((TimerVar << 16) | Time->TimeZone);
+  TimerVar = (UINT32) ((TimerVar << 16) | (UINT16)(Time->TimeZone));
   Status =  EfiSetVariable (
               L"RTC",
               &gEfiCallerIdGuid,
-- 
2.39.2