[edk2-devel] [PATCH v2 1/2] MdeModulePkg: Fix OptionROM scanning

[Marcello Sylvester Bauer]

From: Patrick Rudolph <patrick.rudolph at 9elements.com>

The Option ROM scanner can't work as enumeration was done by the
first stage bootloader. Running it will disable the ability of the
PCIPlatform code to scan for ROMs.

Required for the following patch that enables custom Option ROM
scanning using gPciPlatformProtocol.

Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
Signed-off-by: Marcello Sylvester Bauer <marcello.bauer at 9elements.com>
Cc: Patrick Rudolph <patrick.rudolph at 9elements.com>
Cc: Christian Walter <christian.walter at 9elements.com>
Cc: Hao A Wu <hao.a.wu at intel.com>
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
---
 MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
index 6c68a97d4e46..7420f0079f7d 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
@@ -2530,10 +2530,12 @@ PciEnumeratorLight (
       //
       RemoveRejectedPciDevices (RootBridgeDev->Handle, RootBridgeDev);
 
-      //
-      // Process option rom light
-      //
-      ProcessOptionRomLight (RootBridgeDev);
+      if (!PcdGetBool (PcdPciDisableBusEnumeration)) {
+        //
+        // Process option rom light
+        //
+        ProcessOptionRomLight (RootBridgeDev);
+      }
 
       //
       // Determine attributes for all devices under this root bridge
-- 
2.28.0


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