From 5958a4e877580beaef84563cba034c6efb7f071c Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Sun, 24 Oct 2010 02:51:48 +0000
Subject: [PATCH] [NTOSKRNL] - Partially implement IoAssignResources so that it
 creates a non-conflicting resource list from the requirements but it doesn't
 claim the resources for the device in the registry - Partially implement
 IoReportResourceUsage so that it checks the resource list for conflicts but
 doesn't claim the resources in the registry - Please test this revision with
 a variety of hardware and drivers because it activates several code paths in
 the PnP manager - If this causes problems, look for "Denying an attempt to
 claim resources currently in use by another device!" in the debug log and
 report the bug to me

svn path=/trunk/; revision=49249
---
 reactos/ntoskrnl/io/iomgr/iorsrce.c | 64 +++++++++++++++++++++++++----
 1 file changed, 57 insertions(+), 7 deletions(-)

diff --git a/reactos/ntoskrnl/io/iomgr/iorsrce.c b/reactos/ntoskrnl/io/iomgr/iorsrce.c
index af5913146c6..9d52881ce12 100644
--- a/reactos/ntoskrnl/io/iomgr/iorsrce.c
+++ b/reactos/ntoskrnl/io/iomgr/iorsrce.c
@@ -841,7 +841,7 @@ IoGetConfigurationInformation(VOID)
 }
 
 /*
- * @unimplemented
+ * @halfplemented
  */
 NTSTATUS NTAPI
 IoReportResourceUsage(PUNICODE_STRING DriverClassName,
@@ -876,13 +876,48 @@ IoReportResourceUsage(PUNICODE_STRING DriverClassName,
       *       a conflict is detected with another driver.
       */
 {
-   UNIMPLEMENTED;
-   *ConflictDetected = FALSE;
-   return STATUS_SUCCESS;
+    NTSTATUS Status;
+    PCM_RESOURCE_LIST ResourceList;
+    
+    DPRINT1("IoReportResourceUsage is halfplemented!\n");
+    
+    if (!DriverList && !DeviceList)
+        return STATUS_INVALID_PARAMETER;
+    
+    if (DeviceList)
+        ResourceList = DeviceList;
+    else
+        ResourceList = DriverList;
+    
+    Status = IopDetectResourceConflict(ResourceList, FALSE, NULL);
+    if (Status == STATUS_CONFLICTING_ADDRESSES)
+    {
+        *ConflictDetected = TRUE;
+        
+        if (!OverrideConflict)
+        {
+            DPRINT1("Denying an attempt to claim resources currently in use by another device!\n");
+            return STATUS_CONFLICTING_ADDRESSES;
+        }
+        else
+        {
+            DPRINT1("Proceeding with conflicting resources\n");
+        }
+    }
+    else if (!NT_SUCCESS(Status))
+    {
+        return Status;
+    }
+
+    /* TODO: Claim resources in registry */
+    
+    *ConflictDetected = FALSE;
+    
+    return STATUS_SUCCESS;
 }
 
 /*
- * @unimplemented
+ * @halfplemented
  */
 NTSTATUS NTAPI
 IoAssignResources(PUNICODE_STRING RegistryPath,
@@ -892,8 +927,23 @@ IoAssignResources(PUNICODE_STRING RegistryPath,
 		  PIO_RESOURCE_REQUIREMENTS_LIST RequestedResources,
 		  PCM_RESOURCE_LIST* AllocatedResources)
 {
-   UNIMPLEMENTED;
-   return(STATUS_NOT_IMPLEMENTED);
+    NTSTATUS Status;
+    
+    DPRINT1("IoAssignResources is halfplemented!\n");
+    
+    Status = IopCreateResourceListFromRequirements(RequestedResources,
+                                                   AllocatedResources);
+    if (!NT_SUCCESS(Status))
+    {
+        if (Status == STATUS_CONFLICTING_ADDRESSES)
+            DPRINT1("Denying an attempt to claim resources currently in use by another device!\n");
+        
+        return Status;
+    }
+    
+    /* TODO: Claim resources in registry */
+    
+    return STATUS_SUCCESS;
 }
 
 /*