From 94853f20f34fdce04673c734366d3a53af498325 Mon Sep 17 00:00:00 2001
From: mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 21 May 2009 22:25:38 +0000
Subject: Terminate the Capability List traversal if the Capability Pointer is
 less than 0x40, or the Capability Pointer is not aligned on a 32-bit
 boundary.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8375 6f19259b-4bc3-4df7-8a09-765794883524
---
 DuetPkg/PciBusNoEnumerationDxe/PciCommand.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'DuetPkg')

diff --git a/DuetPkg/PciBusNoEnumerationDxe/PciCommand.c b/DuetPkg/PciBusNoEnumerationDxe/PciCommand.c
index 6d524c1a25..58b482c636 100644
--- a/DuetPkg/PciBusNoEnumerationDxe/PciCommand.c
+++ b/DuetPkg/PciBusNoEnumerationDxe/PciCommand.c
@@ -433,11 +433,7 @@ Returns:
     }
   }
 
-  while (CapabilityPtr > 0x3F) {
-    //
-    // Mask it to DWORD alignment per PCI spec
-    //
-    CapabilityPtr &= 0xFC;
+  while ((CapabilityPtr >= 0x40) && ((CapabilityPtr & 0x03) == 0x00)) {
     PciIoDevice->PciIo.Pci.Read (
                              &PciIoDevice->PciIo,
                              EfiPciIoWidthUint16,
-- 
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