fixed two race conditions with motor power-off; now handles disk change detection and no-disk-in-drive correctly

reactos/drivers/storage/floppy

diff -u -r1.5 -r1.6
--- floppy.c	13 Mar 2004 05:06:49 -0000	1.5
+++ floppy.c	13 Mar 2004 07:04:54 -0000	1.6
@@ -115,14 +115,16 @@

 
   KdPrint(("floppy: StartMotor called\n"));
 

-  if(DriveInfo->ControllerInfo->StopDpcQueued && 
-     !KeCancelTimer(&DriveInfo->ControllerInfo->MotorTimer))

+  if(DriveInfo->ControllerInfo->StopDpcQueued && !KeCancelTimer(&DriveInfo->ControllerInfo->MotorTimer))

     {
       /* Motor turner-offer is already running; wait for it to finish */

+      KdPrint(("floppy: StartMotor: motor turner-offer is already running; waiting for it\n"));

       KeWaitForSingleObject(&DriveInfo->ControllerInfo->MotorStoppedEvent, Executive, KernelMode, FALSE, NULL);

-      DriveInfo->ControllerInfo->StopDpcQueued = FALSE;

+      KdPrint(("floppy: StartMotor: wait satisfied\n"));

     }
 

+  DriveInfo->ControllerInfo->StopDpcQueued = FALSE;
+

   if(HwTurnOnMotor(DriveInfo) != STATUS_SUCCESS)
     KdPrint(("floppy: StartMotor(): warning: HwTurnOnMotor failed\n"));
 }

@@ -768,7 +770,7 @@

   /* Init the stop stuff */
   KeInitializeDpc(&ControllerInfo->MotorStopDpc, MotorStopDpcFunc, ControllerInfo);
   KeInitializeTimer(&ControllerInfo->MotorTimer);

-  KeInitializeEvent(&ControllerInfo->MotorStoppedEvent, SynchronizationEvent, FALSE);

+  KeInitializeEvent(&ControllerInfo->MotorStoppedEvent, NotificationEvent, FALSE);

   ControllerInfo->StopDpcQueued = FALSE;
 
   /*