static int xgene_edac_probe()

in xgene_edac.c [1844:1961]

• 101 lines of code
• 20 McCabe index (conditional complexity)

static int xgene_edac_probe(struct platform_device *pdev)
{
	struct xgene_edac *edac;
	struct device_node *child;
	struct resource *res;
	int rc;

	edac = devm_kzalloc(&pdev->dev, sizeof(*edac), GFP_KERNEL);
	if (!edac)
		return -ENOMEM;

	edac->dev = &pdev->dev;
	platform_set_drvdata(pdev, edac);
	INIT_LIST_HEAD(&edac->mcus);
	INIT_LIST_HEAD(&edac->pmds);
	INIT_LIST_HEAD(&edac->l3s);
	INIT_LIST_HEAD(&edac->socs);
	spin_lock_init(&edac->lock);
	mutex_init(&edac->mc_lock);

	edac->csw_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							"regmap-csw");
	if (IS_ERR(edac->csw_map)) {
		dev_err(edac->dev, "unable to get syscon regmap csw\n");
		rc = PTR_ERR(edac->csw_map);
		goto out_err;
	}

	edac->mcba_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							 "regmap-mcba");
	if (IS_ERR(edac->mcba_map)) {
		dev_err(edac->dev, "unable to get syscon regmap mcba\n");
		rc = PTR_ERR(edac->mcba_map);
		goto out_err;
	}

	edac->mcbb_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							 "regmap-mcbb");
	if (IS_ERR(edac->mcbb_map)) {
		dev_err(edac->dev, "unable to get syscon regmap mcbb\n");
		rc = PTR_ERR(edac->mcbb_map);
		goto out_err;
	}
	edac->efuse_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							  "regmap-efuse");
	if (IS_ERR(edac->efuse_map)) {
		dev_err(edac->dev, "unable to get syscon regmap efuse\n");
		rc = PTR_ERR(edac->efuse_map);
		goto out_err;
	}

	/*
	 * NOTE: The register bus resource is optional for compatibility
	 * reason.
	 */
	edac->rb_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
						       "regmap-rb");
	if (IS_ERR(edac->rb_map)) {
		dev_warn(edac->dev, "missing syscon regmap rb\n");
		edac->rb_map = NULL;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	edac->pcp_csr = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(edac->pcp_csr)) {
		dev_err(&pdev->dev, "no PCP resource address\n");
		rc = PTR_ERR(edac->pcp_csr);
		goto out_err;
	}

	if (edac_op_state == EDAC_OPSTATE_INT) {
		int irq;
		int i;

		for (i = 0; i < 3; i++) {
			irq = platform_get_irq_optional(pdev, i);
			if (irq < 0) {
				dev_err(&pdev->dev, "No IRQ resource\n");
				rc = -EINVAL;
				goto out_err;
			}
			rc = devm_request_irq(&pdev->dev, irq,
					      xgene_edac_isr, IRQF_SHARED,
					      dev_name(&pdev->dev), edac);
			if (rc) {
				dev_err(&pdev->dev,
					"Could not request IRQ %d\n", irq);
				goto out_err;
			}
		}
	}

	edac->dfs = edac_debugfs_create_dir(pdev->dev.kobj.name);

	for_each_child_of_node(pdev->dev.of_node, child) {
		if (!of_device_is_available(child))
			continue;
		if (of_device_is_compatible(child, "apm,xgene-edac-mc"))
			xgene_edac_mc_add(edac, child);
		if (of_device_is_compatible(child, "apm,xgene-edac-pmd"))
			xgene_edac_pmd_add(edac, child, 1);
		if (of_device_is_compatible(child, "apm,xgene-edac-pmd-v2"))
			xgene_edac_pmd_add(edac, child, 2);
		if (of_device_is_compatible(child, "apm,xgene-edac-l3"))
			xgene_edac_l3_add(edac, child, 1);
		if (of_device_is_compatible(child, "apm,xgene-edac-l3-v2"))
			xgene_edac_l3_add(edac, child, 2);
		if (of_device_is_compatible(child, "apm,xgene-edac-soc"))
			xgene_edac_soc_add(edac, child, 0);
		if (of_device_is_compatible(child, "apm,xgene-edac-soc-v1"))
			xgene_edac_soc_add(edac, child, 1);
	}

	return 0;

out_err:
	return rc;
}