dinput: Wait for the internal thread to complete unacquiring.

dlls/dinput/dinput_main.c

@@ -1381,7 +1381,6 @@ static DWORD WINAPI hook_thread_proc(void *param)
                 mouse_hook = NULL;
             }
 
-            if (finished_event)
             SetEvent(finished_event);
         }
     }
@@ -1504,17 +1503,13 @@ void check_dinput_hooks(LPDIRECTINPUTDEVICE8W iface, BOOL acquired)
             WARN( "Unable to (un)register raw device %x:%x\n", dev->raw_device.usUsagePage, dev->raw_device.usUsage );
     }
 
-    if (acquired)
     hook_change_finished_event = CreateEventW( NULL, FALSE, FALSE, NULL );
     PostThreadMessageW( hook_thread_id, WM_USER+0x10, 1, (LPARAM)hook_change_finished_event );
 
     LeaveCriticalSection(&dinput_hook_crit);
 
-    if (acquired)
-    {
     WaitForSingleObject(hook_change_finished_event, INFINITE);
     CloseHandle(hook_change_finished_event);
-    }
 }
 
 void check_dinput_events(void)

dlls/dinput8/tests/hid.c

@@ -4758,9 +4758,6 @@ static void test_simple_joystick(void)
     todo_wine
     ok( hr == DIERR_UNSUPPORTED, "Escape returned: %#x\n", hr );
 
-    /* FIXME: we have to wait a bit because Wine DInput internal thread keeps a reference */
-    Sleep( 100 );
-
     ref = IDirectInputDevice8_Release( device );
     ok( ref == 0, "Release returned %d\n", ref );
 
@@ -7227,9 +7224,6 @@ static void test_force_feedback_joystick( void )
     ok( hr == DI_OK, "Unacquire returned: %#x\n", hr );
     set_hid_expect( file, NULL, 0 );
 
-    /* FIXME: we have to wait a bit because Wine DInput internal thread keeps a reference */
-    Sleep( 100 );
-
     ref = IDirectInputDevice8_Release( device );
     ok( ref == 0, "Release returned %d\n", ref );