static void dev_dax_kmem_remove()

in kmem.c [162:202]

• 31 lines of code
• 5 McCabe index (conditional complexity)

static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
{
	int i, success = 0;
	struct device *dev = &dev_dax->dev;
	struct dax_kmem_data *data = dev_get_drvdata(dev);

	/*
	 * We have one shot for removing memory, if some memory blocks were not
	 * offline prior to calling this function remove_memory() will fail, and
	 * there is no way to hotremove this memory until reboot because device
	 * unbind will succeed even if we return failure.
	 */
	for (i = 0; i < dev_dax->nr_range; i++) {
		struct range range;
		int rc;

		rc = dax_kmem_range(dev_dax, i, &range);
		if (rc)
			continue;

		rc = remove_memory(range.start, range_len(&range));
		if (rc == 0) {
			release_resource(data->res[i]);
			kfree(data->res[i]);
			data->res[i] = NULL;
			success++;
			continue;
		}
		any_hotremove_failed = true;
		dev_err(dev,
			"mapping%d: %#llx-%#llx cannot be hotremoved until the next reboot\n",
				i, range.start, range.end);
	}

	if (success >= dev_dax->nr_range) {
		memory_group_unregister(data->mgid);
		kfree(data->res_name);
		kfree(data);
		dev_set_drvdata(dev, NULL);
	}
}