From 4661d5df04ce804e454509922fd54f45332553da Mon Sep 17 00:00:00 2001
From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 29 Dec 2009 06:16:29 +0000
Subject: Fix a bug about linked list manipulation in DegradeResource() in PCI
 bus driver.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9622 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'MdeModulePkg')

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
index d5f553bcc4..b0637c960c 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
@@ -1050,6 +1050,7 @@ DegradeResource (
   PCI_IO_DEVICE        *Temp;
   LIST_ENTRY           *ChildDeviceLink;
   LIST_ENTRY           *ChildNodeLink;
+  LIST_ENTRY           *NextChildNodeLink;
   PCI_RESOURCE_NODE    *TempNode;
 
   //
@@ -1064,12 +1065,13 @@ DegradeResource (
         ChildNodeLink = Mem64Node->ChildList.ForwardLink;
         while (ChildNodeLink != &Mem64Node->ChildList) {
           TempNode = RESOURCE_NODE_FROM_LINK (ChildNodeLink);
+          NextChildNodeLink = ChildNodeLink->ForwardLink;
 
           if (TempNode->PciDev == Temp) {
             RemoveEntryList (ChildNodeLink);
             InsertResourceNode (Mem32Node, TempNode);
           }
-          ChildNodeLink = TempNode->Link.ForwardLink;
+          ChildNodeLink = NextChildNodeLink;
         }        
       }
 
@@ -1077,12 +1079,13 @@ DegradeResource (
         ChildNodeLink = PMem64Node->ChildList.ForwardLink;
         while (ChildNodeLink != &PMem64Node->ChildList) {
           TempNode = RESOURCE_NODE_FROM_LINK (ChildNodeLink);
+          NextChildNodeLink = ChildNodeLink->ForwardLink;
 
           if (TempNode->PciDev == Temp) {
             RemoveEntryList (ChildNodeLink);
             InsertResourceNode (PMem32Node, TempNode);
           }
-          ChildNodeLink = TempNode->Link.ForwardLink;
+          ChildNodeLink = NextChildNodeLink;
         }        
       }
 
-- 
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