From 6477828cdda35e85cc078ff02b70350db917f601 Mon Sep 17 00:00:00 2001
From: Alex Ionescu <aionescu@gmail.com>
Date: Fri, 5 Aug 2005 21:16:51 +0000
Subject: [PATCH] - DeviceExtension should be NULL if the caller didn't specify
 any size for one.

svn path=/trunk/; revision=17084
---
 reactos/ntoskrnl/io/device.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/io/device.c b/reactos/ntoskrnl/io/device.c
index d4fcc47a96d..ec697dd01ed 100644
--- a/reactos/ntoskrnl/io/device.c
+++ b/reactos/ntoskrnl/io/device.c
@@ -503,7 +503,9 @@ IoCreateDevice(PDRIVER_OBJECT DriverObject,
     /* Set Device Object Data */
     CreatedDeviceObject->DeviceType = DeviceType;
     CreatedDeviceObject->Characteristics = DeviceCharacteristics;
-    CreatedDeviceObject->DeviceExtension = CreatedDeviceObject + 1;
+    CreatedDeviceObject->DeviceExtension = DeviceExtensionSize ?
+                                           CreatedDeviceObject + 1 :
+                                           NULL;
     CreatedDeviceObject->StackSize = 1;
     CreatedDeviceObject->AlignmentRequirement = 1; /* FIXME */