static int cxl_map_regblock()

in pci.c [309:334]

• 21 lines of code
• 3 McCabe index (conditional complexity)

static int cxl_map_regblock(struct pci_dev *pdev, struct cxl_register_map *map)
{
	void __iomem *addr;
	int bar = map->barno;
	struct device *dev = &pdev->dev;
	resource_size_t offset = map->block_offset;

	/* Basic sanity check that BAR is big enough */
	if (pci_resource_len(pdev, bar) < offset) {
		dev_err(dev, "BAR%d: %pr: too small (offset: %pa)\n", bar,
			&pdev->resource[bar], &offset);
		return -ENXIO;
	}

	addr = pci_iomap(pdev, bar, 0);
	if (!addr) {
		dev_err(dev, "failed to map registers\n");
		return -ENOMEM;
	}

	dev_dbg(dev, "Mapped CXL Memory Device resource bar %u @ %pa\n",
		bar, &offset);

	map->base = addr + map->block_offset;
	return 0;
}