[ros-diffs] [cgutman] 54238: [NTOSKRNL] - Fix a major off-by-one bug in resource conflict checking - Respect requested alignment when checking for valid port/memory ranges

Author: cgutman
Date: Sun Oct 23 03:06:23 2011
New Revision: 54238

URL: http://svn.reactos.org/svn/reactos?rev=54238&view=rev
Log:
[NTOSKRNL]
- Fix a major off-by-one bug in resource conflict checking
- Respect requested alignment when checking for valid port/memory ranges

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

Modified: trunk/reactos/ntoskrnl/io/pnpmgr/pnpres.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/pnpmgr/pnpres.…
==============================================================================
--- trunk/reactos/ntoskrnl/io/pnpmgr/pnpres.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpres.c [iso-8859-1] Sun Oct 23 03:06:23 2011
@@ -47,7 +47,7 @@
    ASSERT(IoDesc->Type == CmResourceTypeBusNumber);
 
    for (Start = IoDesc->u.BusNumber.MinBusNumber;
-        Start < IoDesc->u.BusNumber.MaxBusNumber;
+        Start <= IoDesc->u.BusNumber.MaxBusNumber;
         Start++)
    {
         CmDesc->u.BusNumber.Length = IoDesc->u.BusNumber.Length;
@@ -78,9 +78,12 @@
    ASSERT(IoDesc->Type == CmDesc->Type);
    ASSERT(IoDesc->Type == CmResourceTypeMemory);
 
+   /* HACK */
+   if (IoDesc->u.Memory.Alignment == 0) IoDesc->u.Memory.Alignment = 1;
+
    for (Start = IoDesc->u.Memory.MinimumAddress.QuadPart;
-        Start < IoDesc->u.Memory.MaximumAddress.QuadPart;
-        Start++)
+        Start <= IoDesc->u.Memory.MaximumAddress.QuadPart;
+        Start += IoDesc->u.Memory.Alignment)
    {
         CmDesc->u.Memory.Length = IoDesc->u.Memory.Length;
         CmDesc->u.Memory.Start.QuadPart = Start;
@@ -110,10 +113,13 @@
 
    ASSERT(IoDesc->Type == CmDesc->Type);
    ASSERT(IoDesc->Type == CmResourceTypePort);
+    
+   /* HACK */
+   if (IoDesc->u.Port.Alignment == 0) IoDesc->u.Port.Alignment = 1;
 
    for (Start = IoDesc->u.Port.MinimumAddress.QuadPart;
-        Start < IoDesc->u.Port.MaximumAddress.QuadPart;
-        Start++)
+        Start <= IoDesc->u.Port.MaximumAddress.QuadPart;
+        Start += IoDesc->u.Port.Alignment)
    {
         CmDesc->u.Port.Length = IoDesc->u.Port.Length;
         CmDesc->u.Port.Start.QuadPart = Start;
@@ -143,7 +149,7 @@
    ASSERT(IoDesc->Type == CmResourceTypeDma);
 
    for (Channel = IoDesc->u.Dma.MinimumChannel;
-        Channel < IoDesc->u.Dma.MaximumChannel;
+        Channel <= IoDesc->u.Dma.MaximumChannel;
         Channel++)
    {
         CmDesc->u.Dma.Channel = Channel;
@@ -168,7 +174,7 @@
    ASSERT(IoDesc->Type == CmResourceTypeInterrupt);
 
    for (Vector = IoDesc->u.Interrupt.MinimumVector;
-        Vector < IoDesc->u.Interrupt.MaximumVector;
+        Vector <= IoDesc->u.Interrupt.MaximumVector;
         Vector++)
    {
         CmDesc->u.Interrupt.Vector = Vector;