From d6ef8f97e943f6568da3f4c74ff55746480accba Mon Sep 17 00:00:00 2001
From: Victor Perevertkin <victor.perevertkin@reactos.org>
Date: Tue, 10 Nov 2020 01:56:59 +0300
Subject: [PATCH] [NTOS:PNP] Enumerate the device tree after loading boot
 drivers and HAL

---
 ntoskrnl/io/iomgr/driver.c | 6 ++++++
 ntoskrnl/io/iomgr/iomgr.c  | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/ntoskrnl/io/iomgr/driver.c b/ntoskrnl/io/iomgr/driver.c
index 3c4f3433ecf..9fd8c9b87c5 100644
--- a/ntoskrnl/io/iomgr/driver.c
+++ b/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;
         }
diff --git a/ntoskrnl/io/iomgr/iomgr.c b/ntoskrnl/io/iomgr/iomgr.c
index ecdf3fbdb5e..0173cf4911d 100644
--- a/ntoskrnl/io/iomgr/iomgr.c
+++ b/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;