- retval = wait_event_interruptible(list->joydev->wait, list->joydev->exist
- && (list->startup < joydev->nabs + joydev->nkey || list->head != list->tail));
+ retval = wait_event_interruptible(list->joydev->wait,
+ !list->joydev->exist ||
+ list->startup < joydev->nabs + joydev->nkey ||
+ list->head != list->tail);