static int sdw_drv_probe()

in bus_type.c [80:147]

• 41 lines of code
• 12 McCabe index (conditional complexity)

static int sdw_drv_probe(struct device *dev)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);
	struct sdw_driver *drv = drv_to_sdw_driver(dev->driver);
	const struct sdw_device_id *id;
	const char *name;
	int ret;

	/*
	 * fw description is mandatory to bind
	 */
	if (!dev->fwnode)
		return -ENODEV;

	if (!IS_ENABLED(CONFIG_ACPI) && !dev->of_node)
		return -ENODEV;

	id = sdw_get_device_id(slave, drv);
	if (!id)
		return -ENODEV;

	slave->ops = drv->ops;

	/*
	 * attach to power domain but don't turn on (last arg)
	 */
	ret = dev_pm_domain_attach(dev, false);
	if (ret)
		return ret;

	ret = drv->probe(slave, id);
	if (ret) {
		name = drv->name;
		if (!name)
			name = drv->driver.name;
		dev_err(dev, "Probe of %s failed: %d\n", name, ret);
		dev_pm_domain_detach(dev, false);
		return ret;
	}

	/* device is probed so let's read the properties now */
	if (slave->ops && slave->ops->read_prop)
		slave->ops->read_prop(slave);

	/* init the sysfs as we have properties now */
	ret = sdw_slave_sysfs_init(slave);
	if (ret < 0)
		dev_warn(dev, "Slave sysfs init failed:%d\n", ret);

	/*
	 * Check for valid clk_stop_timeout, use DisCo worst case value of
	 * 300ms
	 *
	 * TODO: check the timeouts and driver removal case
	 */
	if (slave->prop.clk_stop_timeout == 0)
		slave->prop.clk_stop_timeout = 300;

	slave->bus->clk_stop_timeout = max_t(u32, slave->bus->clk_stop_timeout,
					     slave->prop.clk_stop_timeout);

	slave->probed = true;
	complete(&slave->probe_complete);

	dev_dbg(dev, "probe complete\n");

	return 0;
}