static bool card_id_ok(struct snd_card *card, const char *id)
{
	int i;
	if (!snd_info_check_reserved_words(id))
		return false;
	for (i = 0; i < snd_ecards_limit; i++) {
		if (snd_cards[i] && snd_cards[i] != card &&
		    !strcmp(snd_cards[i]->id, id))
			return false;
	}
	return true;
}

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.