From adc863cbd42c24c6f32597915cb8a5329e0806ce Mon Sep 17 00:00:00 2001
From: qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 19 Feb 2008 04:13:25 +0000
Subject: [PATCH] Add checking for ChildHandle.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4701 6f19259b-4bc3-4df7-8a09-765794883524
---
 Nt32Pkg/WinNtBlockIoDxe/DriverDiagnostics.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Nt32Pkg/WinNtBlockIoDxe/DriverDiagnostics.c b/Nt32Pkg/WinNtBlockIoDxe/DriverDiagnostics.c
index 1060d46001..fb162aa30d 100644
--- a/Nt32Pkg/WinNtBlockIoDxe/DriverDiagnostics.c
+++ b/Nt32Pkg/WinNtBlockIoDxe/DriverDiagnostics.c
@@ -184,6 +184,13 @@ WinNtBlockIoDriverDiagnosticsRunDiagnostics (
     return EFI_DEVICE_ERROR;
   }
 
+  //
+  // This is a device driver, so ChildHandle must be NULL.
+  //
+  if (ChildHandle != NULL) {
+    return EFI_UNSUPPORTED;
+  }
+
   //
   // Validate controller handle
   //
@@ -207,6 +214,7 @@ WinNtBlockIoDriverDiagnosticsRunDiagnostics (
     return EFI_UNSUPPORTED;
   }
 
+  
   if (Status == EFI_UNSUPPORTED) {
     return Status;
   } else if (Status != EFI_ALREADY_STARTED) {