From de2d7497fd7e64f9c2647bc5f1003d5f427916db Mon Sep 17 00:00:00 2001
From: Star Zeng <star.zeng@intel.com>
Date: Wed, 26 Aug 2015 09:46:29 +0000
Subject: MdeModulePkg FaultTolerantWrite: Error handling for erase operation
 failure

There may be anti-flash wear out feature to forbid erase operation after end of dxe.
The code is missing some error handling for erase operation failure,
it should return directly after the erase operation failed.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18320 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c')

diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c
index f08f280b46..7a6c377854 100644
--- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.c
@@ -3,7 +3,7 @@
   These are the common Fault Tolerant Write (FTW) functions that are shared 
   by DXE FTW driver and SMM FTW driver.
 
-Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials                          
 are licensed and made available under the terms and conditions of the BSD License         
 which accompanies this distribution.  The full text of the license may be found at        
@@ -526,6 +526,11 @@ FtwWrite (
   // Do not assume Spare Block and Target Block have same block size
   //
   Status  = FtwEraseSpareBlock (FtwDevice);
+  if (EFI_ERROR (Status)) {
+    FreePool (MyBuffer);
+    FreePool (SpareBuffer);
+    return EFI_ABORTED;
+  }
   Ptr     = MyBuffer;
   for (Index = 0; MyBufferSize > 0; Index += 1) {
     if (MyBufferSize > FtwDevice->SpareBlockSize) {
@@ -585,6 +590,10 @@ FtwWrite (
   // Restore spare backup buffer into spare block , if no failure happened during FtwWrite.
   //
   Status  = FtwEraseSpareBlock (FtwDevice);
+  if (EFI_ERROR (Status)) {
+    FreePool (SpareBuffer);
+    return EFI_ABORTED;
+  }
   Ptr     = SpareBuffer;
   for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {
     MyLength = FtwDevice->SpareBlockSize;
@@ -706,7 +715,10 @@ FtwRestart (
   // Erase Spare block
   // This is restart, no need to keep spareblock content.
   //
-  FtwEraseSpareBlock (FtwDevice);
+  Status = FtwEraseSpareBlock (FtwDevice);
+  if (EFI_ERROR (Status)) {
+    return EFI_ABORTED;
+  }
 
   DEBUG ((EFI_D_ERROR, "Ftw: Restart() success \n"));
   return EFI_SUCCESS;
-- 
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