git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@242 6f19259b...

[mirror_edk2.git] / MdePkg / Library / BasePciCf8Lib / PciLib.c

diff --git a/MdePkg/Library/BasePciCf8Lib/PciLib.c b/MdePkg/Library/BasePciCf8Lib/PciLib.c
index c5880bdeeee7e49fcc79e970128f291d9bbe4c4c..fe27c850c1f2e9064dce78c4f1477222e62efb24 100644 (file)
--- a/MdePkg/Library/BasePciCf8Lib/PciLib.c
+++ b/MdePkg/Library/BasePciCf8Lib/PciLib.c
@@ -53,7 +53,7 @@
 \r
 **/\r
 #define PCI_TO_CF8_ADDRESS(A) \\r
-  ((UINT32)(((A) >> 4) | ((A) & 0xfc) | 0x80000000))\r
+  ((UINT32) ((((A) >> 4) & 0x00ffff00) | ((A) & 0xfc) | 0x80000000))\r
 \r
 /**\r
   Reads an 8-bit PCI configuration register.\r