static void parport_attach()

in generators/pps_gen_parport.c [179:216]

• 29 lines of code
• 4 McCabe index (conditional complexity)

static void parport_attach(struct parport *port)
{
	struct pardev_cb pps_cb;

	if (attached) {
		/* we already have a port */
		return;
	}

	memset(&pps_cb, 0, sizeof(pps_cb));
	pps_cb.private = &device;
	pps_cb.flags = PARPORT_FLAG_EXCL;
	device.pardev = parport_register_dev_model(port, KBUILD_MODNAME,
						   &pps_cb, 0);
	if (!device.pardev) {
		pr_err("couldn't register with %s\n", port->name);
		return;
	}

	if (parport_claim_or_block(device.pardev) < 0) {
		pr_err("couldn't claim %s\n", port->name);
		goto err_unregister_dev;
	}

	pr_info("attached to %s\n", port->name);
	attached = 1;

	calibrate_port(&device);

	hrtimer_init(&device.timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	device.timer.function = hrtimer_event;
	hrtimer_start(&device.timer, next_intr_time(&device), HRTIMER_MODE_ABS);

	return;

err_unregister_dev:
	parport_unregister_device(device.pardev);
}