From e70ae46c0009d8e51b184aacf09817748082cce6 Mon Sep 17 00:00:00 2001
From: erictian <erictian@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 10 Mar 2011 05:01:15 +0000
Subject: [PATCH 1/1] fix null DevicePath issue.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11360 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c b/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c
index 875baa88b0..6b8257e1b6 100644
--- a/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c
+++ b/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c
@@ -193,13 +193,16 @@ RegisterAtaDevice (
 
   DevicePath = AppendDevicePathNode (AtaBusDriverData->ParentDevicePath, NewDevicePathNode);
   if (DevicePath == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
     goto Done;
   }
 
   DeviceHandle = NULL;
+  RemainingDevicePath = DevicePath;
   Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &DeviceHandle);
   if (!EFI_ERROR (Status) && (DeviceHandle != NULL) && IsDevicePathEnd(RemainingDevicePath)) {
     Status = EFI_ALREADY_STARTED;
+    FreePool (DevicePath);
     goto Done;
   }
 
-- 
2.39.2