From a857ea4199ead1858e55b081fea38fcf0e721c8c Mon Sep 17 00:00:00 2001
From: Shenglei Zhang <shenglei.zhang@intel.com>
Date: Tue, 15 Oct 2019 10:06:42 +0800
Subject: [PATCH] MdeModulePkg/UhciPei: Initialize the variable RequestMap

RequestMap is used but not Initialized.
RequestMap is called by UhciMapUserRequest, in which RequestMap(Map)
is called by IoMmuMap, and is finally called by IoMmu->Map.
We can not assume RequestMap is given an initial value at any step.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
---
 MdeModulePkg/Bus/Pci/UhciPei/UhcPeim.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MdeModulePkg/Bus/Pci/UhciPei/UhcPeim.c b/MdeModulePkg/Bus/Pci/UhciPei/UhcPeim.c
index b897c3f82c..a05834da3c 100644
--- a/MdeModulePkg/Bus/Pci/UhciPei/UhcPeim.c
+++ b/MdeModulePkg/Bus/Pci/UhciPei/UhcPeim.c
@@ -274,6 +274,8 @@ UhcControlTransfer (
 
   PktID       = INPUT_PACKET_ID;
 
+  RequestMap  = NULL;
+
   if (Request == NULL || TransferResult == NULL) {
     return EFI_INVALID_PARAMETER;
   }
-- 
2.39.2