static int netx_pci_probe()

in uio_netx.c [50:116]

• 53 lines of code
• 9 McCabe index (conditional complexity)

static int netx_pci_probe(struct pci_dev *dev,
					const struct pci_device_id *id)
{
	struct uio_info *info;
	int bar;

	info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	if (pci_enable_device(dev))
		return -ENODEV;

	if (pci_request_regions(dev, "netx"))
		goto out_disable;

	switch (id->device) {
	case PCI_DEVICE_ID_HILSCHER_NETX:
		bar = 0;
		info->name = "netx";
		break;
	case PCI_DEVICE_ID_HILSCHER_NETPLC:
		bar = 0;
		info->name = "netplc";
		break;
	default:
		bar = 2;
		info->name = "netx_plx";
	}

	/* BAR0 or 2 points to the card's dual port memory */
	info->mem[0].addr = pci_resource_start(dev, bar);
	if (!info->mem[0].addr)
		goto out_release;
	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
						pci_resource_len(dev, bar));

	if (!info->mem[0].internal_addr)
			goto out_release;

	info->mem[0].size = pci_resource_len(dev, bar);
	info->mem[0].memtype = UIO_MEM_PHYS;
	info->irq = dev->irq;
	info->irq_flags = IRQF_SHARED;
	info->handler = netx_handler;
	info->version = "0.0.1";

	/* Make sure all interrupts are disabled */
	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);

	if (uio_register_device(&dev->dev, info))
		goto out_unmap;

	pci_set_drvdata(dev, info);
	dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
				info->name);

	return 0;

out_unmap:
	iounmap(info->mem[0].internal_addr);
out_release:
	pci_release_regions(dev);
out_disable:
	pci_disable_device(dev);
	return -ENODEV;
}