From d589b317b5070405cab62d7c0e8e1d07134180e6 Mon Sep 17 00:00:00 2001
From: Hendrik Borghorst <hborghor@amazon.de>
Date: Wed, 7 Oct 2020 10:51:51 +0200
Subject: [PATCH] uefi: Disable COM2 in UEFI to prevent it from being used

Windows is using COM2 for debugging purposes, so prevent EDK2 from using
it by not adding the device.

Signed-off-by: Hendrik Borghorst <hborghor@amazon.de>
Reviewed-by: Evgeny Iakovlev <eyakovl@amazon.de>
Reviewed-by: Alexander Graf (AWS) <graf@amazon.de>

diff --git a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
index b9a86cba51..ef3abe5b7a 100644
--- a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
@@ -717,6 +717,7 @@ PrepareLpcBridgeDevicePath (
   EfiBootManagerUpdateConsoleVariable (ConIn, DevicePath, NULL);
   EfiBootManagerUpdateConsoleVariable (ErrOut, DevicePath, NULL);
 
+#if 0
   //
   // Register COM2
   //
@@ -754,6 +755,7 @@ PrepareLpcBridgeDevicePath (
   EfiBootManagerUpdateConsoleVariable (ConOut, DevicePath, NULL);
   EfiBootManagerUpdateConsoleVariable (ConIn, DevicePath, NULL);
   EfiBootManagerUpdateConsoleVariable (ErrOut, DevicePath, NULL);
+#endif
 
   return EFI_SUCCESS;
 }