From e0c3e486e022e34a67887e84434e64b45e997b05 Mon Sep 17 00:00:00 2001
From: yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 22 May 2006 09:36:28 +0000
Subject: [PATCH] git-svn-id:
 https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@232
 6f19259b-4bc3-4df7-8a09-765794883524

---
 MdePkg/Library/BasePciCf8Lib/PciLib.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Library/BasePciCf8Lib/PciLib.c b/MdePkg/Library/BasePciCf8Lib/PciLib.c
index c5880bdeee..0e536ce696 100644
--- a/MdePkg/Library/BasePciCf8Lib/PciLib.c
+++ b/MdePkg/Library/BasePciCf8Lib/PciLib.c
@@ -53,7 +53,9 @@
 
 **/
 #define PCI_TO_CF8_ADDRESS(A) \
-  ((UINT32)(((A) >> 4) | ((A) & 0xfc) | 0x80000000))
+  ((UINT32) ((((A) >> 4) & 0xffffff00) | ((A) & 0xfc) | 0x80000000))
+  
+
 
 /**
   Reads an 8-bit PCI configuration register.
-- 
2.39.2