int nd_pmem_namespace_label_update()

in label.c [1380:1426]

• 37 lines of code
• 10 McCabe index (conditional complexity)

int nd_pmem_namespace_label_update(struct nd_region *nd_region,
		struct nd_namespace_pmem *nspm, resource_size_t size)
{
	int i, rc;

	for (i = 0; i < nd_region->ndr_mappings; i++) {
		struct nd_mapping *nd_mapping = &nd_region->mapping[i];
		struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
		struct resource *res;
		int count = 0;

		if (size == 0) {
			rc = del_labels(nd_mapping, nspm->uuid);
			if (rc)
				return rc;
			continue;
		}

		for_each_dpa_resource(ndd, res)
			if (strncmp(res->name, "pmem", 4) == 0)
				count++;
		WARN_ON_ONCE(!count);

		rc = init_labels(nd_mapping, count);
		if (rc < 0)
			return rc;

		rc = __pmem_label_update(nd_region, nd_mapping, nspm, i,
				NSLABEL_FLAG_UPDATING);
		if (rc)
			return rc;
	}

	if (size == 0)
		return 0;

	/* Clear the UPDATING flag per UEFI 2.7 expectations */
	for (i = 0; i < nd_region->ndr_mappings; i++) {
		struct nd_mapping *nd_mapping = &nd_region->mapping[i];

		rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 0);
		if (rc)
			return rc;
	}

	return 0;
}