[tfaber] 60407: [NTOS:EX] - Correctly return STATUS_TIMER_RESOLUTION_NOT_SET if the resolution was not changed in NtSetTimerResolution. Patch by Aleksandar Andrejevic. CORE-7387

Author: tfaber
Date: Sat Sep 28 11:37:08 2013
New Revision: 60407

URL: http://svn.reactos.org/svn/reactos?rev=60407&view=rev
Log:
[NTOS:EX]
- Correctly return STATUS_TIMER_RESOLUTION_NOT_SET if the resolution was not changed in
NtSetTimerResolution. Patch by Aleksandar Andrejevic.
CORE-7387

Modified:
    trunk/reactos/ntoskrnl/ex/time.c

Modified: trunk/reactos/ntoskrnl/ex/time.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ex/time.c?rev=604…
==============================================================================
--- trunk/reactos/ntoskrnl/ex/time.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ex/time.c	[iso-8859-1] Sat Sep 28 11:37:08 2013
@@ -527,6 +527,7 @@
                      IN BOOLEAN SetResolution,
                      OUT PULONG CurrentResolution)
 {
+    NTSTATUS Status;
     KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
     PEPROCESS Process = PsGetCurrentProcess();
     ULONG NewResolution;
@@ -551,15 +552,21 @@
     NewResolution = ExSetTimerResolution(DesiredResolution, SetResolution);
     *CurrentResolution = NewResolution;
 
-    if (SetResolution)
-    {
-        /* Set the flag that the resolution has been changed */
-        Process->SetTimerResolution = TRUE;
-    }
-
-    /* Return success if the process changed its timer resolution */
-    if (Process->SetTimerResolution) return STATUS_SUCCESS;
-    else return STATUS_TIMER_RESOLUTION_NOT_SET;
+    if (SetResolution || Process->SetTimerResolution)
+    {
+        /* The resolution has been changed now or in an earlier call */
+        Status = STATUS_SUCCESS;
+    }
+    else
+    {
+        /* The resolution hasn't been changed */
+        Status = STATUS_TIMER_RESOLUTION_NOT_SET;
+    }
+
+    /* Update the flag */
+    Process->SetTimerResolution = SetResolution;
+
+    return Status;
 }
 
 /* EOF */