int snd_card_free_when_closed(struct snd_card *card)
{
	int ret = snd_card_disconnect(card);
	if (ret)
		return ret;
	put_device(&card->card_dev);
	return 0;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.