[cgutman] 46431: [NTOSKRNL] - Handle devices that are run by their own bus drivers - This could be done a bit nicer but it works

Author: cgutman
Date: Thu Mar 25 06:16:31 2010
New Revision: 46431

URL: http://svn.reactos.org/svn/reactos?rev=46431&view=rev
Log:
[NTOSKRNL]
- Handle devices that are run by their own bus drivers
- This could be done a bit nicer but it works

Modified:
    trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c

Modified: trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c...
==============================================================================
--- trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c [iso-8859-1] Thu Mar 25 06:16:31 2010
@@ -1847,6 +1847,7 @@
    PUNICODE_STRING Service;
    UNICODE_STRING ClassGUID;
    NTSTATUS Status;
+   DEVICE_CAPABILITIES DeviceCaps;

DPRINT("IopActionConfigureChildServices(%p, %p)\n", DeviceNode, Context);

@@ -1920,15 +1921,32 @@

if (Service->Buffer == NULL)
       {
-         IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
-
-         if (ClassGUID.Length != 0)
+         if (NT_SUCCESS(IopQueryDeviceCapabilities(DeviceNode, &DeviceCaps)) &&
+             DeviceCaps.RawDeviceOK)
+         {
+            DPRINT1("%wZ is using parent bus driver (%wZ)\n", &DeviceNode->InstancePath, &ParentDeviceNode->ServiceName);
+
+            DeviceNode->ServiceName.Length = 0;
+            DeviceNode->ServiceName.MaximumLength = ParentDeviceNode->ServiceName.MaximumLength;
+            DeviceNode->ServiceName.Buffer = ExAllocatePool(PagedPool, DeviceNode->ServiceName.MaximumLength);
+            if (!DeviceNode->ServiceName.Buffer)
+                return STATUS_SUCCESS;
+
+            RtlCopyUnicodeString(&DeviceNode->ServiceName, &ParentDeviceNode->ServiceName);
+
+            IopDeviceNodeSetFlag(DeviceNode, DNF_LEGACY_DRIVER);
+         }
+         else if (ClassGUID.Length != 0)
          {
             /* Device has a ClassGUID value, but no Service value.
              * Suppose it is using the NULL driver, so state the
              * device is started */
             DPRINT1("%wZ is using NULL driver\n", &DeviceNode->InstancePath);
             IopDeviceNodeSetFlag(DeviceNode, DNF_STARTED);
+         }
+         else
+         {
+            IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
          }
          return STATUS_SUCCESS;
       }