static int slim_device_alloc_laddr()

in core.c [426:474]

• 40 lines of code
• 7 McCabe index (conditional complexity)

static int slim_device_alloc_laddr(struct slim_device *sbdev,
				   bool report_present)
{
	struct slim_controller *ctrl = sbdev->ctrl;
	u8 laddr;
	int ret;

	mutex_lock(&ctrl->lock);
	if (ctrl->get_laddr) {
		ret = ctrl->get_laddr(ctrl, &sbdev->e_addr, &laddr);
		if (ret < 0)
			goto err;
	} else if (report_present) {
		ret = ida_simple_get(&ctrl->laddr_ida,
				     0, SLIM_LA_MANAGER - 1, GFP_KERNEL);
		if (ret < 0)
			goto err;

		laddr = ret;
	} else {
		ret = -EINVAL;
		goto err;
	}

	if (ctrl->set_laddr) {
		ret = ctrl->set_laddr(ctrl, &sbdev->e_addr, laddr);
		if (ret) {
			ret = -EINVAL;
			goto err;
		}
	}

	sbdev->laddr = laddr;
	sbdev->is_laddr_valid = true;
	mutex_unlock(&ctrl->lock);

	slim_device_update_status(sbdev, SLIM_DEVICE_STATUS_UP);

	dev_dbg(ctrl->dev, "setting slimbus l-addr:%x, ea:%x,%x,%x,%x\n",
		laddr, sbdev->e_addr.manf_id, sbdev->e_addr.prod_code,
		sbdev->e_addr.dev_index, sbdev->e_addr.instance);

	return 0;

err:
	mutex_unlock(&ctrl->lock);
	return ret;

}