commit 
2a7feab28d3fc060d320eaba192e49dad1079b7e introduces a bug.
My thinkpad actually will send an eject_request and we should follow the
eject process to finish the eject, otherwise system still thinks the bay
is present.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
         */
        dock_event(ds, event, UNDOCK_EVENT);
 
-       if (!dock_present(ds)) {
-               complete_undock(ds);
-               return -ENODEV;
-       }
-
        hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
        undock(ds);
        eject_dock(ds);