[mjmartin] 46761: [usb/usbehci] - Instead of converting GUID to UNICODE_STRING and comparing, use IsEqualGUIDAligned. Thanks Ged. - Remove a unneeded header.

Author: mjmartin
Date: Wed Apr  7 13:09:36 2010
New Revision: 46761

URL: http://svn.reactos.org/svn/reactos?rev=46761&view=rev
Log:
[usb/usbehci]
- Instead of converting GUID to UNICODE_STRING and comparing, use IsEqualGUIDAligned. Thanks Ged.
- Remove a unneeded header.

Modified:
    trunk/reactos/drivers/usb/usbehci/pdo.c

Modified: trunk/reactos/drivers/usb/usbehci/pdo.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/usb/usbehci/pdo.c?r...
==============================================================================
--- trunk/reactos/drivers/usb/usbehci/pdo.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/usb/usbehci/pdo.c [iso-8859-1] Wed Apr  7 13:09:36 2010
@@ -17,7 +17,6 @@
 #include <wdmguid.h>
 #include <stdio.h>
 #include <debug.h>
-#include <guiddef.h>

/* Lifted from Linux with slight changes */
 const UCHAR ROOTHUB2_DEVICE_DESCRIPTOR [] =
@@ -540,39 +539,29 @@
         case IRP_MN_QUERY_INTERFACE:
         {
             UNICODE_STRING GuidString;
-            UNICODE_STRING InterfacMatchString;
             PUSB_BUS_INTERFACE_HUB_V5 InterfaceHub;
             PUSB_BUS_INTERFACE_USBDI_V2 InterfaceDI;
             PPDO_DEVICE_EXTENSION PdoDeviceExtension;
             PFDO_DEVICE_EXTENSION FdoDeviceExtension;
-            NTSTATUS CompareStatus;

PdoDeviceExtension = (PPDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
             FdoDeviceExtension = (PFDO_DEVICE_EXTENSION)PdoDeviceExtension->ControllerFdo->DeviceExtension;
+
+            Status = RtlStringFromGUID(Stack->Parameters.QueryInterface.InterfaceType, &GuidString);
+            if (!NT_SUCCESS(Status))
+            {
+                DPRINT1("Failed to create string from GUID!\n");
+            }
+
+            DPRINT1("Interface GUID requested %wZ\n", &GuidString);
+            DPRINT1("QueryInterface.Size %x\n", Stack->Parameters.QueryInterface.Size);
+            DPRINT1("QueryInterface.Version %x\n", Stack->Parameters.QueryInterface.Version);

/* Assume success */
             Status = STATUS_SUCCESS;
             Information = 0;

-            CompareStatus = RtlStringFromGUID(Stack->Parameters.QueryInterface.InterfaceType, &GuidString);
-            if (!NT_SUCCESS(CompareStatus))
-            {
-                DPRINT1("Failed to create string from GUID!\n");
-            }
-
-            DPRINT1("Interface GUID requested %wZ\n", &GuidString);
-            DPRINT1("QueryInterface.Size %x\n", Stack->Parameters.QueryInterface.Size);
-            DPRINT1("QueryInterface.Version %x\n", Stack->Parameters.QueryInterface.Version);
-
-            CompareStatus = RtlStringFromGUID(&USB_BUS_INTERFACE_HUB_GUID, &InterfacMatchString);
-            if (!NT_SUCCESS(CompareStatus))
-            {
-                DPRINT1("Failed to create string from GUID!\n");
-            }
-
-            CompareStatus = RtlCompareUnicodeString(&InterfacMatchString, &GuidString, TRUE);
-
-            if (NT_SUCCESS(CompareStatus))
+            if (IsEqualGUIDAligned(Stack->Parameters.QueryInterface.InterfaceType, &USB_BUS_INTERFACE_HUB_GUID))
             {
                 InterfaceHub = (PUSB_BUS_INTERFACE_HUB_V5)Stack->Parameters.QueryInterface.Interface;
                 InterfaceHub->Version = Stack->Parameters.QueryInterface.Version;
@@ -622,15 +611,7 @@
                 break;
             }

-            CompareStatus = RtlStringFromGUID(&USB_BUS_INTERFACE_USBDI_GUID, &InterfacMatchString);
-            if (!NT_SUCCESS(CompareStatus))
-            {
-                DPRINT1("Failed to create string from GUID!\n");
-            }
-
-            CompareStatus = RtlCompareUnicodeString(&InterfacMatchString, &GuidString, TRUE);
-
-            if (NT_SUCCESS(CompareStatus))
+            if (IsEqualGUIDAligned(Stack->Parameters.QueryInterface.InterfaceType, &USB_BUS_INTERFACE_USBDI_GUID))
             {
                 InterfaceDI = (PUSB_BUS_INTERFACE_USBDI_V2) Stack->Parameters.QueryInterface.Interface;
                 InterfaceDI->Version = Stack->Parameters.QueryInterface.Version;