static int pps_tty_open()

in clients/pps-ldisc.c [41:79]

• 32 lines of code
• 3 McCabe index (conditional complexity)

static int pps_tty_open(struct tty_struct *tty)
{
	struct pps_source_info info;
	struct tty_driver *drv = tty->driver;
	int index = tty->index + drv->name_base;
	struct pps_device *pps;
	int ret;

	info.owner = THIS_MODULE;
	info.dev = NULL;
	snprintf(info.name, PPS_MAX_NAME_LEN, "%s%d", drv->driver_name, index);
	snprintf(info.path, PPS_MAX_NAME_LEN, "/dev/%s%d", drv->name, index);
	info.mode = PPS_CAPTUREBOTH | \
			PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
			PPS_CANWAIT | PPS_TSFMT_TSPEC;

	pps = pps_register_source(&info, PPS_CAPTUREBOTH | \
				PPS_OFFSETASSERT | PPS_OFFSETCLEAR);
	if (IS_ERR(pps)) {
		pr_err("cannot register PPS source \"%s\"\n", info.path);
		return PTR_ERR(pps);
	}
	pps->lookup_cookie = tty;

	/* Now open the base class N_TTY ldisc */
	ret = alias_n_tty_open(tty);
	if (ret < 0) {
		pr_err("cannot open tty ldisc \"%s\"\n", info.path);
		goto err_unregister;
	}

	dev_info(pps->dev, "source \"%s\" added\n", info.path);

	return 0;

err_unregister:
	pps_unregister_source(pps);
	return ret;
}