[NTOS:PNP]
[reactos.git] / reactos / ntoskrnl / io / pnpmgr / pnpmgr.c
index 608ab15..8f79fc4 100644 (file)
@@ -781,7 +781,7 @@ IopStartDevice(
    PDEVICE_NODE DeviceNode)
 {
    NTSTATUS Status;
-   HANDLE InstanceHandle = INVALID_HANDLE_VALUE, ControlHandle = INVALID_HANDLE_VALUE;
+   HANDLE InstanceHandle = NULL, ControlHandle = NULL;
    UNICODE_STRING KeyName;
    OBJECT_ATTRIBUTES ObjectAttributes;
 
@@ -817,10 +817,10 @@ IopStartDevice(
    // }
 
 ByeBye:
-   if (ControlHandle != INVALID_HANDLE_VALUE)
+   if (ControlHandle != NULL)
        ZwClose(ControlHandle);
 
-   if (InstanceHandle != INVALID_HANDLE_VALUE)
+   if (InstanceHandle != NULL)
        ZwClose(InstanceHandle);
 
    return Status;
@@ -1868,357 +1868,370 @@ NTSTATUS
 IopActionInterrogateDeviceStack(PDEVICE_NODE DeviceNode,
                                 PVOID Context)
 {
-   IO_STATUS_BLOCK IoStatusBlock;
-   PDEVICE_NODE ParentDeviceNode;
-   WCHAR InstancePath[MAX_PATH];
-   IO_STACK_LOCATION Stack;
-   NTSTATUS Status;
-   ULONG RequiredLength;
-   LCID LocaleId;
-   HANDLE InstanceKey = NULL;
-   UNICODE_STRING ValueName;
-   UNICODE_STRING ParentIdPrefix = { 0, 0, NULL };
-   UNICODE_STRING InstancePathU;
-   DEVICE_CAPABILITIES DeviceCapabilities;
-   PDEVICE_OBJECT OldDeviceObject;
+    IO_STATUS_BLOCK IoStatusBlock;
+    PWSTR InformationString;
+    PDEVICE_NODE ParentDeviceNode;
+    WCHAR InstancePath[MAX_PATH];
+    IO_STACK_LOCATION Stack;
+    NTSTATUS Status;
+    ULONG RequiredLength;
+    LCID LocaleId;
+    HANDLE InstanceKey = NULL;
+    UNICODE_STRING ValueName;
+    UNICODE_STRING ParentIdPrefix = { 0, 0, NULL };
+    UNICODE_STRING InstancePathU;
+    DEVICE_CAPABILITIES DeviceCapabilities;
+    PDEVICE_OBJECT OldDeviceObject;
 
-   DPRINT("IopActionInterrogateDeviceStack(%p, %p)\n", DeviceNode, Context);
-   DPRINT("PDO 0x%p\n", DeviceNode->PhysicalDeviceObject);
+    DPRINT("IopActionInterrogateDeviceStack(%p, %p)\n", DeviceNode, Context);
+    DPRINT("PDO 0x%p\n", DeviceNode->PhysicalDeviceObject);
 
-   ParentDeviceNode = (PDEVICE_NODE)Context;
+    ParentDeviceNode = (PDEVICE_NODE)Context;
 
-   /*
-    * We are called for the parent too, but we don't need to do special
-    * handling for this node
-    */
+    /*
+     * We are called for the parent too, but we don't need to do special
+     * handling for this node
+     */
+    if (DeviceNode == ParentDeviceNode)
+    {
+        DPRINT("Success\n");
+        return STATUS_SUCCESS;
+    }
 
-   if (DeviceNode == ParentDeviceNode)
-   {
-      DPRINT("Success\n");
-      return STATUS_SUCCESS;
-   }
+    /*
+     * Make sure this device node is a direct child of the parent device node
+     * that is given as an argument
+     */
+    if (DeviceNode->Parent != ParentDeviceNode)
+    {
+        DPRINT("Skipping 2+ level child\n");
+        return STATUS_SUCCESS;
+    }
 
-   /*
-    * Make sure this device node is a direct child of the parent device node
-    * that is given as an argument
-    */
+    /* Skip processing if it was already completed before */
+    if (DeviceNode->Flags & DNF_PROCESSED)
+    {
+        /* Nothing to do */
+        return STATUS_SUCCESS;
+    }
 
-   if (DeviceNode->Parent != ParentDeviceNode)
-   {
-      DPRINT("Skipping 2+ level child\n");
-      return STATUS_SUCCESS;
-   }
+    /* Get Locale ID */
+    Status = ZwQueryDefaultLocale(FALSE, &LocaleId);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("ZwQueryDefaultLocale() failed with status 0x%lx\n", Status);
+        return Status;
+    }
 
-   /* Skip processing if it was already completed before */
-   if (DeviceNode->Flags & DNF_PROCESSED)
-   {
-       /* Nothing to do */
-       return STATUS_SUCCESS;
-   }
+    /*
+     * FIXME: For critical errors, cleanup and disable device, but always
+     * return STATUS_SUCCESS.
+     */
 
-   /* Get Locale ID */
-   Status = ZwQueryDefaultLocale(FALSE, &LocaleId);
-   if (!NT_SUCCESS(Status))
-   {
-      DPRINT1("ZwQueryDefaultLocale() failed with status 0x%lx\n", Status);
-      return Status;
-   }
+    DPRINT("Sending IRP_MN_QUERY_ID.BusQueryDeviceID to device stack\n");
 
-   /*
-    * FIXME: For critical errors, cleanup and disable device, but always
-    * return STATUS_SUCCESS.
-    */
+    Stack.Parameters.QueryId.IdType = BusQueryDeviceID;
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_ID,
+                               &Stack);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("IopInitiatePnpIrp() failed (Status %x)\n", Status);
 
-   DPRINT("Sending IRP_MN_QUERY_ID.BusQueryDeviceID to device stack\n");
+        /* We have to return success otherwise we abort the traverse operation */
+        return STATUS_SUCCESS;
+    }
 
-   Stack.Parameters.QueryId.IdType = BusQueryDeviceID;
-   Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
-                              &IoStatusBlock,
-                              IRP_MN_QUERY_ID,
-                              &Stack);
-   if (NT_SUCCESS(Status))
-   {
-      /* Copy the device id string */
-      wcscpy(InstancePath, (PWSTR)IoStatusBlock.Information);
+    /* Copy the device id string */
+    InformationString = (PWSTR)IoStatusBlock.Information;
+    wcscpy(InstancePath, InformationString);
 
-      /*
-       * FIXME: Check for valid characters, if there is invalid characters
-       * then bugcheck.
-       */
-   }
-   else
-   {
-      DPRINT1("IopInitiatePnpIrp() failed (Status %x)\n", Status);
+    /*
+     * FIXME: Check for valid characters, if there is invalid characters
+     * then bugcheck.
+     */
 
-      /* We have to return success otherwise we abort the traverse operation */
-      return STATUS_SUCCESS;
-   }
+    ExFreePoolWithTag(InformationString, 0);
 
-   DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after enumeration)\n");
+    DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after enumeration)\n");
 
-   Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
-   if (!NT_SUCCESS(Status))
-   {
-      DPRINT1("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
+    Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
 
-      /* We have to return success otherwise we abort the traverse operation */
-      return STATUS_SUCCESS;
-   }
+        /* We have to return success otherwise we abort the traverse operation */
+        return STATUS_SUCCESS;
+    }
 
-   /* This bit is only check after enumeration */
-   if (DeviceCapabilities.HardwareDisabled)
-   {
-       /* FIXME: Cleanup device */
-       DeviceNode->Flags |= DNF_DISABLED;
-       return STATUS_SUCCESS;
-   }
-   else
-       DeviceNode->Flags &= ~DNF_DISABLED;
+    /* This bit is only check after enumeration */
+    if (DeviceCapabilities.HardwareDisabled)
+    {
+        /* FIXME: Cleanup device */
+        DeviceNode->Flags |= DNF_DISABLED;
+        return STATUS_SUCCESS;
+    }
+    else
+    {
+        DeviceNode->Flags &= ~DNF_DISABLED;
+    }
 
-   if (!DeviceCapabilities.UniqueID)
-   {
-      /* Device has not a unique ID. We need to prepend parent bus unique identifier */
-      DPRINT("Instance ID is not unique\n");
-      Status = IopGetParentIdPrefix(DeviceNode, &ParentIdPrefix);
-      if (!NT_SUCCESS(Status))
-      {
-         DPRINT1("IopGetParentIdPrefix() failed (Status 0x%08lx)\n", Status);
+    if (!DeviceCapabilities.UniqueID)
+    {
+        /* Device has not a unique ID. We need to prepend parent bus unique identifier */
+        DPRINT("Instance ID is not unique\n");
+        Status = IopGetParentIdPrefix(DeviceNode, &ParentIdPrefix);
+        if (!NT_SUCCESS(Status))
+        {
+            DPRINT1("IopGetParentIdPrefix() failed (Status 0x%08lx)\n", Status);
 
-         /* We have to return success otherwise we abort the traverse operation */
-         return STATUS_SUCCESS;
-      }
-   }
+            /* We have to return success otherwise we abort the traverse operation */
+            return STATUS_SUCCESS;
+        }
+    }
 
-   DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
+    DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
 
-   Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
-   Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
-                              &IoStatusBlock,
-                              IRP_MN_QUERY_ID,
-                              &Stack);
-   if (NT_SUCCESS(Status))
-   {
-      /* Append the instance id string */
-      wcscat(InstancePath, L"\\");
-      if (ParentIdPrefix.Length > 0)
-      {
-         /* Add information from parent bus device to InstancePath */
-         wcscat(InstancePath, ParentIdPrefix.Buffer);
-         if (IoStatusBlock.Information && *(PWSTR)IoStatusBlock.Information)
-            wcscat(InstancePath, L"&");
-      }
-      if (IoStatusBlock.Information)
-         wcscat(InstancePath, (PWSTR)IoStatusBlock.Information);
+    Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_ID,
+                               &Stack);
+    if (NT_SUCCESS(Status))
+    {
+        InformationString = (PWSTR)IoStatusBlock.Information;
 
-      /*
-       * FIXME: Check for valid characters, if there is invalid characters
-       * then bugcheck
-       */
-   }
-   else
-   {
-      DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
-   }
-   RtlFreeUnicodeString(&ParentIdPrefix);
+        /* Append the instance id string */
+        wcscat(InstancePath, L"\\");
+        if (ParentIdPrefix.Length > 0)
+        {
+            /* Add information from parent bus device to InstancePath */
+            wcscat(InstancePath, ParentIdPrefix.Buffer);
+            if (InformationString && *InformationString)
+            {
+                wcscat(InstancePath, L"&");
+            }
+        }
+        if (InformationString)
+        {
+            wcscat(InstancePath, InformationString);
+        }
 
-   if (!RtlCreateUnicodeString(&InstancePathU, InstancePath))
-   {
-      DPRINT("No resources\n");
-      /* FIXME: Cleanup and disable device */
-   }
+        /*
+         * FIXME: Check for valid characters, if there is invalid characters
+         * then bugcheck
+         */
 
-   /* Verify that this is not a duplicate */
-   OldDeviceObject = IopGetDeviceObjectFromDeviceInstance(&InstancePathU);
-   if (OldDeviceObject != NULL)
-   {
-       PDEVICE_NODE OldDeviceNode = IopGetDeviceNode(OldDeviceObject);
+        if (InformationString)
+        {
+            ExFreePoolWithTag(InformationString, 0);
+        }
+    }
+    else
+    {
+        DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
+    }
+    RtlFreeUnicodeString(&ParentIdPrefix);
 
-       DPRINT1("Duplicate device instance '%wZ'\n", &InstancePathU);
-       DPRINT1("Current instance parent: '%wZ'\n", &DeviceNode->Parent->InstancePath);
-       DPRINT1("Old instance parent: '%wZ'\n", &OldDeviceNode->Parent->InstancePath);
+    if (!RtlCreateUnicodeString(&InstancePathU, InstancePath))
+    {
+        DPRINT("No resources\n");
+        /* FIXME: Cleanup and disable device */
+    }
 
-       KeBugCheckEx(PNP_DETECTED_FATAL_ERROR,
-                    0x01,
-                    (ULONG_PTR)DeviceNode->PhysicalDeviceObject,
-                    (ULONG_PTR)OldDeviceObject,
-                    0);
-   }
+    /* Verify that this is not a duplicate */
+    OldDeviceObject = IopGetDeviceObjectFromDeviceInstance(&InstancePathU);
+    if (OldDeviceObject != NULL)
+    {
+        PDEVICE_NODE OldDeviceNode = IopGetDeviceNode(OldDeviceObject);
 
-   DeviceNode->InstancePath = InstancePathU;
+        DPRINT1("Duplicate device instance '%wZ'\n", &InstancePathU);
+        DPRINT1("Current instance parent: '%wZ'\n", &DeviceNode->Parent->InstancePath);
+        DPRINT1("Old instance parent: '%wZ'\n", &OldDeviceNode->Parent->InstancePath);
 
-   DPRINT("InstancePath is %S\n", DeviceNode->InstancePath.Buffer);
+        KeBugCheckEx(PNP_DETECTED_FATAL_ERROR,
+                     0x01,
+                     (ULONG_PTR)DeviceNode->PhysicalDeviceObject,
+                     (ULONG_PTR)OldDeviceObject,
+                     0);
+    }
 
-   /*
-    * Create registry key for the instance id, if it doesn't exist yet
-    */
-   Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, 0, &InstanceKey);
-   if (!NT_SUCCESS(Status))
-   {
-      DPRINT1("Failed to create the instance key! (Status %lx)\n", Status);
+    DeviceNode->InstancePath = InstancePathU;
 
-      /* We have to return success otherwise we abort the traverse operation */
-      return STATUS_SUCCESS;
-   }
+    DPRINT("InstancePath is %S\n", DeviceNode->InstancePath.Buffer);
 
-   IopQueryHardwareIds(DeviceNode, InstanceKey);
+    /*
+     * Create registry key for the instance id, if it doesn't exist yet
+     */
+    Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, 0, &InstanceKey);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to create the instance key! (Status %lx)\n", Status);
 
-   IopQueryCompatibleIds(DeviceNode, InstanceKey);
+        /* We have to return success otherwise we abort the traverse operation */
+        return STATUS_SUCCESS;
+    }
 
-   DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextDescription to device stack\n");
+    IopQueryHardwareIds(DeviceNode, InstanceKey);
 
-   Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextDescription;
-   Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
-   Status = IopInitiatePnpIrp(
-      DeviceNode->PhysicalDeviceObject,
-      &IoStatusBlock,
-      IRP_MN_QUERY_DEVICE_TEXT,
-      &Stack);
-   /* This key is mandatory, so even if the Irp fails, we still write it */
-   RtlInitUnicodeString(&ValueName, L"DeviceDesc");
-   if (ZwQueryValueKey(InstanceKey, &ValueName, KeyValueBasicInformation, NULL, 0, &RequiredLength) == STATUS_OBJECT_NAME_NOT_FOUND)
-   {
-      if (NT_SUCCESS(Status) &&
-         IoStatusBlock.Information &&
-         (*(PWSTR)IoStatusBlock.Information != 0))
-      {
-         /* This key is overriden when a driver is installed. Don't write the
-          * new description if another one already exists */
-         Status = ZwSetValueKey(InstanceKey,
-                                &ValueName,
-                                0,
-                                REG_SZ,
-                                (PVOID)IoStatusBlock.Information,
-                                ((ULONG)wcslen((PWSTR)IoStatusBlock.Information) + 1) * sizeof(WCHAR));
-      }
-      else
-      {
-         UNICODE_STRING DeviceDesc = RTL_CONSTANT_STRING(L"Unknown device");
-         DPRINT("Driver didn't return DeviceDesc (Status 0x%08lx), so place unknown device there\n", Status);
+    IopQueryCompatibleIds(DeviceNode, InstanceKey);
 
-         Status = ZwSetValueKey(InstanceKey,
-            &ValueName,
-            0,
-            REG_SZ,
-            DeviceDesc.Buffer,
-            DeviceDesc.MaximumLength);
+    DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextDescription to device stack\n");
 
-         if (!NT_SUCCESS(Status))
-         {
-            DPRINT1("ZwSetValueKey() failed (Status 0x%lx)\n", Status);
-         }
+    Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextDescription;
+    Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_DEVICE_TEXT,
+                               &Stack);
+    InformationString = NT_SUCCESS(Status) ? (PWSTR)IoStatusBlock.Information
+                                           : NULL;
+    /* This key is mandatory, so even if the Irp fails, we still write it */
+    RtlInitUnicodeString(&ValueName, L"DeviceDesc");
+    if (ZwQueryValueKey(InstanceKey, &ValueName, KeyValueBasicInformation, NULL, 0, &RequiredLength) == STATUS_OBJECT_NAME_NOT_FOUND)
+    {
+        if (InformationString &&
+            *InformationString != UNICODE_NULL)
+        {
+            /* This key is overriden when a driver is installed. Don't write the
+             * new description if another one already exists */
+            Status = ZwSetValueKey(InstanceKey,
+                                   &ValueName,
+                                   0,
+                                   REG_SZ,
+                                   InformationString,
+                                   ((ULONG)wcslen(InformationString) + 1) * sizeof(WCHAR));
+        }
+        else
+        {
+            UNICODE_STRING DeviceDesc = RTL_CONSTANT_STRING(L"Unknown device");
+            DPRINT("Driver didn't return DeviceDesc (Status 0x%08lx), so place unknown device there\n", Status);
 
-      }
-   }
+            Status = ZwSetValueKey(InstanceKey,
+                                   &ValueName,
+                                   0,
+                                   REG_SZ,
+                                   DeviceDesc.Buffer,
+                                   DeviceDesc.MaximumLength);
+            if (!NT_SUCCESS(Status))
+            {
+                DPRINT1("ZwSetValueKey() failed (Status 0x%lx)\n", Status);
+            }
 
-   DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextLocation to device stack\n");
+        }
+    }
 
-   Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextLocationInformation;
-   Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
-   Status = IopInitiatePnpIrp(
-      DeviceNode->PhysicalDeviceObject,
-      &IoStatusBlock,
-      IRP_MN_QUERY_DEVICE_TEXT,
-      &Stack);
-   if (NT_SUCCESS(Status) && IoStatusBlock.Information)
-   {
-      DPRINT("LocationInformation: %S\n", (PWSTR)IoStatusBlock.Information);
-      RtlInitUnicodeString(&ValueName, L"LocationInformation");
-      Status = ZwSetValueKey(InstanceKey,
-         &ValueName,
-         0,
-         REG_SZ,
-         (PVOID)IoStatusBlock.Information,
-         ((ULONG)wcslen((PWSTR)IoStatusBlock.Information) + 1) * sizeof(WCHAR));
-      if (!NT_SUCCESS(Status))
-      {
-         DPRINT1("ZwSetValueKey() failed (Status %lx)\n", Status);
-      }
-   }
-   else
-   {
-      DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
-   }
+    if (InformationString)
+    {
+        ExFreePoolWithTag(InformationString, 0);
+    }
 
-   DPRINT("Sending IRP_MN_QUERY_BUS_INFORMATION to device stack\n");
+    DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextLocation to device stack\n");
 
-   Status = IopInitiatePnpIrp(
-      DeviceNode->PhysicalDeviceObject,
-      &IoStatusBlock,
-      IRP_MN_QUERY_BUS_INFORMATION,
-      NULL);
-   if (NT_SUCCESS(Status) && IoStatusBlock.Information)
-   {
-      PPNP_BUS_INFORMATION BusInformation =
-         (PPNP_BUS_INFORMATION)IoStatusBlock.Information;
+    Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextLocationInformation;
+    Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_DEVICE_TEXT,
+                               &Stack);
+    if (NT_SUCCESS(Status) && IoStatusBlock.Information)
+    {
+        InformationString = (PWSTR)IoStatusBlock.Information;
+        DPRINT("LocationInformation: %S\n", InformationString);
+        RtlInitUnicodeString(&ValueName, L"LocationInformation");
+        Status = ZwSetValueKey(InstanceKey,
+                               &ValueName,
+                               0,
+                               REG_SZ,
+                               InformationString,
+                               ((ULONG)wcslen(InformationString) + 1) * sizeof(WCHAR));
+        if (!NT_SUCCESS(Status))
+        {
+            DPRINT1("ZwSetValueKey() failed (Status %lx)\n", Status);
+        }
 
-      DeviceNode->ChildBusNumber = BusInformation->BusNumber;
-      DeviceNode->ChildInterfaceType = BusInformation->LegacyBusType;
-      DeviceNode->ChildBusTypeIndex = IopGetBusTypeGuidIndex(&BusInformation->BusTypeGuid);
-      ExFreePool(BusInformation);
-   }
-   else
-   {
-      DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
+        ExFreePoolWithTag(InformationString, 0);
+    }
+    else
+    {
+        DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
+    }
 
-      DeviceNode->ChildBusNumber = 0xFFFFFFF0;
-      DeviceNode->ChildInterfaceType = InterfaceTypeUndefined;
-      DeviceNode->ChildBusTypeIndex = -1;
-   }
+    DPRINT("Sending IRP_MN_QUERY_BUS_INFORMATION to device stack\n");
 
-   DPRINT("Sending IRP_MN_QUERY_RESOURCES to device stack\n");
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_BUS_INFORMATION,
+                               NULL);
+    if (NT_SUCCESS(Status) && IoStatusBlock.Information)
+    {
+        PPNP_BUS_INFORMATION BusInformation = (PPNP_BUS_INFORMATION)IoStatusBlock.Information;
 
-   Status = IopInitiatePnpIrp(
-      DeviceNode->PhysicalDeviceObject,
-      &IoStatusBlock,
-      IRP_MN_QUERY_RESOURCES,
-      NULL);
-   if (NT_SUCCESS(Status) && IoStatusBlock.Information)
-   {
-      DeviceNode->BootResources =
-         (PCM_RESOURCE_LIST)IoStatusBlock.Information;
-      IopDeviceNodeSetFlag(DeviceNode, DNF_HAS_BOOT_CONFIG);
-   }
-   else
-   {
-      DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
-      DeviceNode->BootResources = NULL;
-   }
+        DeviceNode->ChildBusNumber = BusInformation->BusNumber;
+        DeviceNode->ChildInterfaceType = BusInformation->LegacyBusType;
+        DeviceNode->ChildBusTypeIndex = IopGetBusTypeGuidIndex(&BusInformation->BusTypeGuid);
+        ExFreePoolWithTag(BusInformation, 0);
+    }
+    else
+    {
+        DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
 
-   DPRINT("Sending IRP_MN_QUERY_RESOURCE_REQUIREMENTS to device stack\n");
+        DeviceNode->ChildBusNumber = 0xFFFFFFF0;
+        DeviceNode->ChildInterfaceType = InterfaceTypeUndefined;
+        DeviceNode->ChildBusTypeIndex = -1;
+    }
 
-   Status = IopInitiatePnpIrp(
-      DeviceNode->PhysicalDeviceObject,
-      &IoStatusBlock,
-      IRP_MN_QUERY_RESOURCE_REQUIREMENTS,
-      NULL);
-   if (NT_SUCCESS(Status))
-   {
-      DeviceNode->ResourceRequirements =
-         (PIO_RESOURCE_REQUIREMENTS_LIST)IoStatusBlock.Information;
-   }
-   else
-   {
-      DPRINT("IopInitiatePnpIrp() failed (Status %08lx)\n", Status);
-      DeviceNode->ResourceRequirements = NULL;
-   }
+    DPRINT("Sending IRP_MN_QUERY_RESOURCES to device stack\n");
 
-   if (InstanceKey != NULL)
-   {
-      IopSetDeviceInstanceData(InstanceKey, DeviceNode);
-   }
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_RESOURCES,
+                               NULL);
+    if (NT_SUCCESS(Status) && IoStatusBlock.Information)
+    {
+        DeviceNode->BootResources = (PCM_RESOURCE_LIST)IoStatusBlock.Information;
+        IopDeviceNodeSetFlag(DeviceNode, DNF_HAS_BOOT_CONFIG);
+    }
+    else
+    {
+        DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
+        DeviceNode->BootResources = NULL;
+    }
+
+    DPRINT("Sending IRP_MN_QUERY_RESOURCE_REQUIREMENTS to device stack\n");
+
+    Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
+                               &IoStatusBlock,
+                               IRP_MN_QUERY_RESOURCE_REQUIREMENTS,
+                               NULL);
+    if (NT_SUCCESS(Status))
+    {
+        DeviceNode->ResourceRequirements = (PIO_RESOURCE_REQUIREMENTS_LIST)IoStatusBlock.Information;
+    }
+    else
+    {
+        DPRINT("IopInitiatePnpIrp() failed (Status %08lx)\n", Status);
+        DeviceNode->ResourceRequirements = NULL;
+    }
+
+    if (InstanceKey != NULL)
+    {
+        IopSetDeviceInstanceData(InstanceKey, DeviceNode);
+    }
 
-   ZwClose(InstanceKey);
+    ZwClose(InstanceKey);
 
-   IopDeviceNodeSetFlag(DeviceNode, DNF_PROCESSED);
+    IopDeviceNodeSetFlag(DeviceNode, DNF_PROCESSED);
 
-   if (!IopDeviceNodeHasFlag(DeviceNode, DNF_LEGACY_DRIVER))
-   {
-      /* Report the device to the user-mode pnp manager */
-      IopQueueTargetDeviceEvent(&GUID_DEVICE_ENUMERATED,
-                                &DeviceNode->InstancePath);
-   }
+    if (!IopDeviceNodeHasFlag(DeviceNode, DNF_LEGACY_DRIVER))
+    {
+        /* Report the device to the user-mode pnp manager */
+        IopQueueTargetDeviceEvent(&GUID_DEVICE_ENUMERATED,
+                                  &DeviceNode->InstancePath);
+    }
 
-   return STATUS_SUCCESS;
+    return STATUS_SUCCESS;
 }
 
 static