static int mt6360_led_probe()

in flash/leds-mt6360.c [794:882]

• 72 lines of code
• 16 McCabe index (conditional complexity)

static int mt6360_led_probe(struct platform_device *pdev)
{
	struct mt6360_priv *priv;
	struct fwnode_handle *child;
	size_t count;
	int i = 0, ret;

	count = device_get_child_node_count(&pdev->dev);
	if (!count || count > MT6360_MAX_LEDS) {
		dev_err(&pdev->dev,
			"No child node or node count over max led number %zu\n",
			count);
		return -EINVAL;
	}

	priv = devm_kzalloc(&pdev->dev,
			    struct_size(priv, leds, count), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->leds_count = count;
	priv->dev = &pdev->dev;
	mutex_init(&priv->lock);

	priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!priv->regmap) {
		dev_err(&pdev->dev, "Failed to get parent regmap\n");
		return -ENODEV;
	}

	device_for_each_child_node(&pdev->dev, child) {
		struct mt6360_led *led = priv->leds + i;
		struct led_init_data init_data = { .fwnode = child, };
		u32 reg, led_color;

		ret = fwnode_property_read_u32(child, "color", &led_color);
		if (ret)
			goto out_flash_release;

		if (led_color == LED_COLOR_ID_RGB ||
		    led_color == LED_COLOR_ID_MULTI)
			reg = MT6360_VIRTUAL_MULTICOLOR;
		else {
			ret = fwnode_property_read_u32(child, "reg", &reg);
			if (ret)
				goto out_flash_release;

			if (reg >= MT6360_MAX_LEDS) {
				ret = -EINVAL;
				goto out_flash_release;
			}
		}

		if (priv->leds_active & BIT(reg)) {
			ret = -EINVAL;
			goto out_flash_release;
		}
		priv->leds_active |= BIT(reg);

		led->led_no = reg;
		led->priv = priv;

		ret = mt6360_init_common_properties(led, &init_data);
		if (ret)
			goto out_flash_release;

		if (reg == MT6360_VIRTUAL_MULTICOLOR ||
		    reg <= MT6360_LED_ISNKML)
			ret = mt6360_init_isnk_properties(led, &init_data);
		else
			ret = mt6360_init_flash_properties(led, &init_data);

		if (ret)
			goto out_flash_release;

		ret = mt6360_led_register(&pdev->dev, led, &init_data);
		if (ret)
			goto out_flash_release;

		i++;
	}

	platform_set_drvdata(pdev, priv);
	return 0;

out_flash_release:
	mt6360_v4l2_flash_release(priv);
	return ret;
}