From e2100bfa651cd0d1295ef13451b9cf4adddb8bfa Mon Sep 17 00:00:00 2001
From: ydong10 <ydong10@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 23 Dec 2010 06:47:50 +0000
Subject: 1. Support inconsistent if opcode used in string/password opcode. 2.
 Add sample code of using inconsistent if opcode in string opcode.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11196 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c')

diff --git a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
index efd260512a..9b664b4958 100644
--- a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
+++ b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
@@ -910,9 +910,6 @@ DriverCallback (
     return EFI_INVALID_PARAMETER;
   }
 
-  if ((Type == EFI_IFR_TYPE_STRING) && (Value->string == 0)) {
-    return EFI_INVALID_PARAMETER;
-  }
 
   Status = EFI_SUCCESS;
   PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
@@ -1166,6 +1163,15 @@ DriverCallback (
     break;
 
   case 0x2000:
+    //
+    // Only used to update the state.
+    //
+    if ((Type == EFI_IFR_TYPE_STRING) && (Value->string == 0) && 
+      (PrivateData->PasswordState == BROWSER_STATE_SET_PASSWORD)) {
+      PrivateData->PasswordState = BROWSER_STATE_VALIDATE_PASSWORD;
+      return EFI_INVALID_PARAMETER;
+    }
+
     //
     // When try to set a new password, user will be chanlleged with old password.
     // The Callback is responsible for validating old password input by user,
-- 
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