From d0844d133bf1b76abfbc83387758fdd01360334b Mon Sep 17 00:00:00 2001
From: qianouyang <qianouyang@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 6 May 2011 07:15:41 +0000
Subject: Add Pointer check for NULL before referring it and remove unnecessary
 pointer check in AtaAtapiPassThru and Partition Drivers.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11627 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'MdeModulePkg/Bus')

diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
index 3e135d74ec..526590718a 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
@@ -794,7 +794,7 @@ ErrorExit:
            );
   }
 
-  if (Instance->TimerEvent != NULL) {
+  if ((Instance != NULL) && (Instance->TimerEvent != NULL)) {
     gBS->CloseEvent (Instance->TimerEvent);
   }
 
-- 
cgit v1.2.3