[dchapyshev] 72552: [NTOS:IO] - Add dismount checking (function should behave the same in the fastio and the slow case) - Fix comment

Author: dchapyshev
Date: Sat Sep  3 19:10:09 2016
New Revision: 72552

URL: http://svn.reactos.org/svn/reactos?rev=72552&view=rev
Log:
[NTOS:IO]
- Add dismount checking (function should behave the same in the fastio and the slow case)
- Fix comment

Modified:
    trunk/reactos/ntoskrnl/io/iomgr/iofunc.c

Modified: trunk/reactos/ntoskrnl/io/iomgr/iofunc.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/iomgr/iofunc.c…
==============================================================================
--- trunk/reactos/ntoskrnl/io/iomgr/iofunc.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/iomgr/iofunc.c	[iso-8859-1] Sat Sep  3 19:10:09 2016
@@ -348,7 +348,7 @@
         DeviceObject = IoGetRelatedDeviceObject(FileObject);
     }
 
-    /* If that's FS I/O, try to do it with FastIO path */
+    /* If this is a device I/O, try to do it with FastIO path */
     if (IsDevIoCtl)
     {
         PFAST_IO_DISPATCH FastIoDispatch =
DeviceObject->DriverObject->FastIoDispatch;
@@ -613,6 +613,12 @@
 
     /* Use deferred completion for FS I/O */
     Irp->Flags |= (!IsDevIoCtl) ? IRP_DEFER_IO_COMPLETION : 0;
+
+    /* If we're to dismount a volume, increaase the dismount count */
+    if (IoControlCode == FSCTL_DISMOUNT_VOLUME)
+    {
+        InterlockedExchangeAdd((PLONG)&SharedUserData->DismountCount, 1);
+    }
 
     /* Perform the call */
     return IopPerformSynchronousRequest(DeviceObject,