From aa09397b3c62c7b409135ed91edef8bd7bd33a73 Mon Sep 17 00:00:00 2001
From: qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 19 Oct 2007 08:49:20 +0000
Subject: Fix a bug in variable driver cache mechanism: It should return
 EFI_SUCCESS and update the output buffer size if the input buffer is larger
 than actual variable contents.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4182 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
index 34bc4a8e15..20eeebe54c 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
@@ -676,11 +676,12 @@ FindVariableInCache (
         if (Entry->DataSize == 0) {
           // Variable was deleted so return not found
           return EFI_NOT_FOUND;
-        } else if (Entry->DataSize != *DataSize) {
+        } else if (Entry->DataSize > *DataSize) {
           // If the buffer is too small return correct size
           *DataSize = Entry->DataSize;
           return EFI_BUFFER_TOO_SMALL;
         } else {
+          *DataSize = Entry->DataSize;
           // Return the data
           CopyMem (Data, Entry->Data, Entry->DataSize);
           if (Attributes != NULL) {
-- 
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