static int nvme_update_ns_info()

in host/core.c [1909:1962]

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

static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id)
{
	unsigned lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
	int ret;

	blk_mq_freeze_queue(ns->disk->queue);
	ns->lba_shift = id->lbaf[lbaf].ds;
	nvme_set_queue_limits(ns->ctrl, ns->queue);

	ret = nvme_configure_metadata(ns, id);
	if (ret)
		goto out_unfreeze;
	nvme_set_chunk_sectors(ns, id);
	nvme_update_disk_info(ns->disk, ns, id);

	if (ns->head->ids.csi == NVME_CSI_ZNS) {
		ret = nvme_update_zone_info(ns, lbaf);
		if (ret)
			goto out_unfreeze;
	}

	set_bit(NVME_NS_READY, &ns->flags);
	blk_mq_unfreeze_queue(ns->disk->queue);

	if (blk_queue_is_zoned(ns->queue)) {
		ret = nvme_revalidate_zones(ns);
		if (ret && !nvme_first_scan(ns->disk))
			goto out;
	}

	if (nvme_ns_head_multipath(ns->head)) {
		blk_mq_freeze_queue(ns->head->disk->queue);
		nvme_update_disk_info(ns->head->disk, ns, id);
		nvme_mpath_revalidate_paths(ns);
		blk_stack_limits(&ns->head->disk->queue->limits,
				 &ns->queue->limits, 0);
		disk_update_readahead(ns->head->disk);
		blk_mq_unfreeze_queue(ns->head->disk->queue);
	}
	return 0;

out_unfreeze:
	blk_mq_unfreeze_queue(ns->disk->queue);
out:
	/*
	 * If probing fails due an unsupported feature, hide the block device,
	 * but still allow other access.
	 */
	if (ret == -ENODEV) {
		ns->disk->flags |= GENHD_FL_HIDDEN;
		ret = 0;
	}
	return ret;
}