static void snd_card_set_id_no_lock(struct snd_card *card, const char *src,
				    const char *nid)
{
	int len, loops;
	bool is_default = false;
	char *id;
	
	copy_valid_id_string(card, src, nid);
	id = card->id;

 again:
	/* use "Default" for obviously invalid strings
	 * ("card" conflicts with proc directories)
	 */
	if (!*id || !strncmp(id, "card", 4)) {
		strcpy(id, "Default");
		is_default = true;
	}

	len = strlen(id);
	for (loops = 0; loops < SNDRV_CARDS; loops++) {
		char *spos;
		char sfxstr[5]; /* "_012" */
		int sfxlen;

		if (card_id_ok(card, id))
			return; /* OK */

		/* Add _XYZ suffix */
		sprintf(sfxstr, "_%X", loops + 1);
		sfxlen = strlen(sfxstr);
		if (len + sfxlen >= sizeof(card->id))
			spos = id + sizeof(card->id) - sfxlen - 1;
		else
			spos = id + len;
		strcpy(spos, sfxstr);
	}
	/* fallback to the default id */
	if (!is_default) {
		*id = 0;
		goto again;
	}
	/* last resort... */
	dev_err(card->dev, "unable to set card id (%s)\n", id);
	if (card->proc_root->name)
		strlcpy(card->id, card->proc_root->name, sizeof(card->id));
}

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.