static int uniphier_glue_reset_probe()

in reset-uniphier-glue.c [31:100]

• 56 lines of code
• 15 McCabe index (conditional complexity)

static int uniphier_glue_reset_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct uniphier_glue_reset_priv *priv;
	struct resource *res;
	resource_size_t size;
	const char *name;
	int i, ret, nr;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->data = of_device_get_match_data(dev);
	if (WARN_ON(!priv->data || priv->data->nclks > MAX_CLKS ||
		    priv->data->nrsts > MAX_RSTS))
		return -EINVAL;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	size = resource_size(res);
	priv->rdata.membase = devm_ioremap_resource(dev, res);
	if (IS_ERR(priv->rdata.membase))
		return PTR_ERR(priv->rdata.membase);

	for (i = 0; i < priv->data->nclks; i++)
		priv->clk[i].id = priv->data->clock_names[i];
	ret = devm_clk_bulk_get(dev, priv->data->nclks, priv->clk);
	if (ret)
		return ret;

	for (i = 0; i < priv->data->nrsts; i++) {
		name = priv->data->reset_names[i];
		priv->rst[i] = devm_reset_control_get_shared(dev, name);
		if (IS_ERR(priv->rst[i]))
			return PTR_ERR(priv->rst[i]);
	}

	ret = clk_bulk_prepare_enable(priv->data->nclks, priv->clk);
	if (ret)
		return ret;

	for (nr = 0; nr < priv->data->nrsts; nr++) {
		ret = reset_control_deassert(priv->rst[nr]);
		if (ret)
			goto out_rst_assert;
	}

	spin_lock_init(&priv->rdata.lock);
	priv->rdata.rcdev.owner = THIS_MODULE;
	priv->rdata.rcdev.nr_resets = size * BITS_PER_BYTE;
	priv->rdata.rcdev.ops = &reset_simple_ops;
	priv->rdata.rcdev.of_node = dev->of_node;
	priv->rdata.active_low = true;

	platform_set_drvdata(pdev, priv);

	ret = devm_reset_controller_register(dev, &priv->rdata.rcdev);
	if (ret)
		goto out_rst_assert;

	return 0;

out_rst_assert:
	while (nr--)
		reset_control_assert(priv->rst[nr]);

	clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);

	return ret;
}