static int altr_edac_device_probe()

in altera_edac.c [714:813]

• 80 lines of code
• 11 McCabe index (conditional complexity)

static int altr_edac_device_probe(struct platform_device *pdev)
{
	struct edac_device_ctl_info *dci;
	struct altr_edac_device_dev *drvdata;
	struct resource *r;
	int res = 0;
	struct device_node *np = pdev->dev.of_node;
	char *ecc_name = (char *)np->name;
	static int dev_instance;

	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to open devm\n");
		return -ENOMEM;
	}

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to get mem resource\n");
		res = -ENODEV;
		goto fail;
	}

	if (!devm_request_mem_region(&pdev->dev, r->start, resource_size(r),
				     dev_name(&pdev->dev))) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s:Error requesting mem region\n", ecc_name);
		res = -EBUSY;
		goto fail;
	}

	dci = edac_device_alloc_ctl_info(sizeof(*drvdata), ecc_name,
					 1, ecc_name, 1, 0, NULL, 0,
					 dev_instance++);

	if (!dci) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s: Unable to allocate EDAC device\n", ecc_name);
		res = -ENOMEM;
		goto fail;
	}

	drvdata = dci->pvt_info;
	dci->dev = &pdev->dev;
	platform_set_drvdata(pdev, dci);
	drvdata->edac_dev_name = ecc_name;

	drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
	if (!drvdata->base) {
		res = -ENOMEM;
		goto fail1;
	}

	/* Get driver specific data for this EDAC device */
	drvdata->data = of_match_node(altr_edac_device_of_match, np)->data;

	/* Check specific dependencies for the module */
	if (drvdata->data->setup) {
		res = drvdata->data->setup(drvdata);
		if (res)
			goto fail1;
	}

	drvdata->sb_irq = platform_get_irq(pdev, 0);
	res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
			       altr_edac_device_handler,
			       0, dev_name(&pdev->dev), dci);
	if (res)
		goto fail1;

	drvdata->db_irq = platform_get_irq(pdev, 1);
	res = devm_request_irq(&pdev->dev, drvdata->db_irq,
			       altr_edac_device_handler,
			       0, dev_name(&pdev->dev), dci);
	if (res)
		goto fail1;

	dci->mod_name = "Altera ECC Manager";
	dci->dev_name = drvdata->edac_dev_name;

	res = edac_device_add_device(dci);
	if (res)
		goto fail1;

	altr_create_edacdev_dbgfs(dci, drvdata->data);

	devres_close_group(&pdev->dev, NULL);

	return 0;

fail1:
	edac_device_free_ctl_info(dci);
fail:
	devres_release_group(&pdev->dev, NULL);
	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "%s:Error setting up EDAC device: %d\n", ecc_name, res);

	return res;
}