From: "Shifflett, Joseph" <[email protected]>

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <[email protected]>
---
 DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c |  8 ++++++++
 MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c        |  8 ++++++++
 MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c | 16 ++++++++++++++++
 MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c               |  8 ++++++++
 4 files changed, 40 insertions(+)

diff --git a/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c 
b/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
index fb41727..80b2b6b 100644
--- a/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
+++ b/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
@@ -1,6 +1,7 @@
 /*++
 
 Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2015 Hewlett Packard Enterprise Development LP<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        
@@ -216,6 +217,13 @@ Returns:
                 (UINT8) Func
                 );
 
+      if (EFI_ERROR (Status) && Func == 0) {
+        //
+        // go to next device if there is no Function 0
+        //
+        break;
+      }
+
       if (!EFI_ERROR (Status)) {
 
         //
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c 
b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
index 7329143..597c083 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
@@ -2,6 +2,7 @@
   PCI eunmeration implementation on entire PCI bus system for PCI Bus module.
 
 Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2015 Hewlett Packard Enterprise Development LP<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
@@ -407,6 +408,13 @@ PciAssignBusNumber (
                 Func
                 );
 
+      if (EFI_ERROR (Status) && Func == 0) {
+        //
+        // go to next device if there is no Function 0
+        //
+        break;
+      }
+
       if (!EFI_ERROR (Status)   &&
           (IS_PCI_BRIDGE (&Pci) || IS_CARDBUS_BRIDGE (&Pci))) {
 
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c 
b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
index f46025e..f7aea4f 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
@@ -2,6 +2,7 @@
   PCI emumeration support functions implementation for PCI Bus module.
 
 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2015 Hewlett Packard Enterprise Development LP<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
@@ -119,6 +120,14 @@ PciPciDeviceInfoCollector (
                  (UINT8) Device,
                  (UINT8) Func
                  );
+
+      if (EFI_ERROR (Status) && Func == 0) {
+        //
+        // go to next device if there is no Function 0
+        //
+        break;
+      }
+
       if (!EFI_ERROR (Status)) {
 
         //
@@ -2597,6 +2606,13 @@ ResetAllPpbBusNumber (
                  Func
                  );
 
+      if (EFI_ERROR (Status) && Func == 0) {
+        //
+        // go to next device if there is no Function 0
+        //
+        break;
+      }
+
       if (!EFI_ERROR (Status) && (IS_PCI_BRIDGE (&Pci))) {
 
         Register  = 0;
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c 
b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
index b3d91a8..3e275e3 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
@@ -2,6 +2,7 @@
   Internal library implementation for PCI Bus module.
 
 Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2015 Hewlett Packard Enterprise Development LP<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
@@ -1022,6 +1023,13 @@ PciScanBus (
                 Func
                 );
 
+      if (EFI_ERROR (Status) && Func == 0) {
+        //
+        // go to next device if there is no Function 0
+        //
+        break;
+      }
+
       if (EFI_ERROR (Status)) {
         continue;
       }
-- 
1.9.5.msysgit.1

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