static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
		struct qeth_reply *reply, unsigned long data)
{
	struct qeth_ipa_cmd *cmd;
	struct qeth_set_access_ctrl *access_ctrl_req;
	int fallback = *(int *)reply->param;

	QETH_CARD_TEXT(card, 4, "setaccb");

	cmd = (struct qeth_ipa_cmd *) data;
	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
	QETH_DBF_TEXT_(SETUP, 2, "setaccb");
	QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
	QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
		cmd->data.setadapterparms.hdr.return_code);
	if (cmd->data.setadapterparms.hdr.return_code !=
						SET_ACCESS_CTRL_RC_SUCCESS)
		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
				card->gdev->dev.kobj.name,
				access_ctrl_req->subcmd_code,
				cmd->data.setadapterparms.hdr.return_code);
	switch (cmd->data.setadapterparms.hdr.return_code) {
	case SET_ACCESS_CTRL_RC_SUCCESS:
		if (card->options.isolation == ISOLATION_MODE_NONE) {
			dev_info(&card->gdev->dev,
			    "QDIO data connection isolation is deactivated\n");
		} else {
			dev_info(&card->gdev->dev,
			    "QDIO data connection isolation is activated\n");
		}
		break;
	case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
		QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
				"deactivated\n", dev_name(&card->gdev->dev));
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
		QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
				" activated\n", dev_name(&card->gdev->dev));
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
		dev_err(&card->gdev->dev, "Adapter does not "
			"support QDIO data connection isolation\n");
		break;
	case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
		dev_err(&card->gdev->dev,
			"Adapter is dedicated. "
			"QDIO data connection isolation not supported\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
		dev_err(&card->gdev->dev,
			"TSO does not permit QDIO data connection isolation\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
		dev_err(&card->gdev->dev, "The adjacent switch port does not "
			"support reflective relay mode\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
		dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
					"enabled at the adjacent switch port");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
		dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
					"at the adjacent switch failed\n");
		break;
	default:
		/* this should never happen */
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	}
	qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
	return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.