static int __init pci_eisa_init()

in pci_eisa.c [21:65]

• 29 lines of code
• 6 McCabe index (conditional complexity)

static int __init pci_eisa_init(struct pci_dev *pdev)
{
	int rc, i;
	struct resource *res, *bus_res = NULL;

	if ((rc = pci_enable_device (pdev))) {
		dev_err(&pdev->dev, "Could not enable device\n");
		return rc;
	}

	/*
	 * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI
	 * device, so the resources available on EISA are the same as those
	 * available on the 82375 bus.  This works the same as a PCI-PCI
	 * bridge in subtractive-decode mode (see pci_read_bridge_bases()).
	 * We assume other PCI-EISA bridges are similar.
	 *
	 * eisa_root_register() can only deal with a single io port resource,
	*  so we use the first valid io port resource.
	 */
	pci_bus_for_each_resource(pdev->bus, res, i)
		if (res && (res->flags & IORESOURCE_IO)) {
			bus_res = res;
			break;
		}

	if (!bus_res) {
		dev_err(&pdev->dev, "No resources available\n");
		return -1;
	}

	pci_eisa_root.dev		= &pdev->dev;
	pci_eisa_root.res		= bus_res;
	pci_eisa_root.bus_base_addr	= bus_res->start;
	pci_eisa_root.slots		= EISA_MAX_SLOTS;
	pci_eisa_root.dma_mask		= pdev->dma_mask;
	dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root);

	if (eisa_root_register (&pci_eisa_root)) {
		dev_err(&pdev->dev, "Could not register EISA root\n");
		return -1;
	}

	return 0;
}