static int mox_get_board_info()

in turris-mox-rwtm.c [191:261]

• 62 lines of code
• 11 McCabe index (conditional complexity)

static int mox_get_board_info(struct mox_rwtm *rwtm)
{
	struct armada_37xx_rwtm_tx_msg msg;
	struct armada_37xx_rwtm_rx_msg *reply = &rwtm->reply;
	int ret;

	msg.command = MBOX_CMD_BOARD_INFO;
	ret = mbox_send_message(rwtm->mbox, &msg);
	if (ret < 0)
		return ret;

	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
	if (ret < 0)
		return ret;

	ret = mox_get_status(MBOX_CMD_BOARD_INFO, reply->retval);
	if (ret == -ENODATA) {
		dev_warn(rwtm->dev,
			 "Board does not have manufacturing information burned!\n");
	} else if (ret == -ENOSYS) {
		dev_notice(rwtm->dev,
			   "Firmware does not support the BOARD_INFO command\n");
	} else if (ret < 0) {
		return ret;
	} else {
		rwtm->serial_number = reply->status[1];
		rwtm->serial_number <<= 32;
		rwtm->serial_number |= reply->status[0];
		rwtm->board_version = reply->status[2];
		rwtm->ram_size = reply->status[3];
		reply_to_mac_addr(rwtm->mac_address1, reply->status[4],
				  reply->status[5]);
		reply_to_mac_addr(rwtm->mac_address2, reply->status[6],
				  reply->status[7]);
		rwtm->has_board_info = 1;

		pr_info("Turris Mox serial number %016llX\n",
			rwtm->serial_number);
		pr_info("           board version %i\n", rwtm->board_version);
		pr_info("           burned RAM size %i MiB\n", rwtm->ram_size);
	}

	msg.command = MBOX_CMD_ECDSA_PUB_KEY;
	ret = mbox_send_message(rwtm->mbox, &msg);
	if (ret < 0)
		return ret;

	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
	if (ret < 0)
		return ret;

	ret = mox_get_status(MBOX_CMD_ECDSA_PUB_KEY, reply->retval);
	if (ret == -ENODATA) {
		dev_warn(rwtm->dev, "Board has no public key burned!\n");
	} else if (ret == -ENOSYS) {
		dev_notice(rwtm->dev,
			   "Firmware does not support the ECDSA_PUB_KEY command\n");
	} else if (ret < 0) {
		return ret;
	} else {
		u32 *s = reply->status;

		rwtm->has_pubkey = 1;
		sprintf(rwtm->pubkey,
			"%06x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
			ret, s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7],
			s[8], s[9], s[10], s[11], s[12], s[13], s[14], s[15]);
	}

	return 0;
}