[NTOS:PNP] Enumerate the device tree after loading boot drivers and HAL

ntoskrnl/io/iomgr/driver.c

@@ -1122,6 +1122,12 @@ IopInitializeBootDrivers(VOID)
             /* Initialize it */
             IopInitializeBuiltinDriver(LdrEntry);
 
+            /* Start the devices found by a driver (if any) */
+            PiQueueDeviceAction(IopRootDeviceNode->PhysicalDeviceObject,
+                                PiActionEnumRootDevices,
+                                NULL,
+                                NULL);
+
             /* Next entry */
             NextEntry = NextEntry->Flink;
         }

ntoskrnl/io/iomgr/iomgr.c

@@ -543,6 +543,13 @@ IoInitSystem(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
     /* Initialize HAL Root Bus Driver */
     HalInitPnpDriver();
 
+    /* Reenumerate what HAL has added (synchronously)
+     * This function call should eventually become a 2nd stage of the PnP initialization */
+    PiQueueDeviceAction(IopRootDeviceNode->PhysicalDeviceObject,
+                        PiActionEnumRootDevices,
+                        NULL,
+                        NULL);
+
     /* Make loader block available for the whole kernel */
     IopLoaderBlock = LoaderBlock;