From af8ba51aca4e0b41a359fe467fb5c5b9baa75a05 Mon Sep 17 00:00:00 2001
From: Jeff Fan <jeff.fan@intel.com>
Date: Mon, 26 Dec 2016 19:16:23 +0800
Subject: [PATCH] UefiCpuPkg/MpInitLib: Set new AP to idle state after
 switching BSP

We need to set new AP to idle state if it is expected to be waken up by new BSP
later.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Kinney Michael D <michael.d.kinney@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
---
 UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 77d855a29a..78d18b616e 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1608,6 +1608,8 @@ SwitchBSPWorker (
   //
   if (!EnableOldBSP) {
     SetApState (&CpuMpData->CpuData[CallerNumber], CpuStateDisabled);
+  } else {
+    SetApState (&CpuMpData->CpuData[CallerNumber], CpuStateIdle);
   }
   //
   // Save new BSP number
-- 
2.39.5