__ib_unregister_device
__ib_unregister_device(device);
__ib_unregister_device(ib_dev);
__ib_unregister_device(ib_dev);
__ib_unregister_device(ib_dev);
__ib_unregister_device(ib_dev);
static void __ib_unregister_device(struct ib_device *device);