static int change_num_qps()

in mlx5/net/mlx5_vnet.c [1517:1553]

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

static int change_num_qps(struct mlx5_vdpa_dev *mvdev, int newqps)
{
	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
	int cur_qps = ndev->cur_num_vqs / 2;
	int err;
	int i;

	if (cur_qps > newqps) {
		err = modify_rqt(ndev, 2 * newqps);
		if (err)
			return err;

		for (i = ndev->cur_num_vqs - 1; i >= 2 * newqps; i--)
			teardown_vq(ndev, &ndev->vqs[i]);

		ndev->cur_num_vqs = 2 * newqps;
	} else {
		ndev->cur_num_vqs = 2 * newqps;
		for (i = cur_qps * 2; i < 2 * newqps; i++) {
			err = setup_vq(ndev, &ndev->vqs[i]);
			if (err)
				goto clean_added;
		}
		err = modify_rqt(ndev, 2 * newqps);
		if (err)
			goto clean_added;
	}
	return 0;

clean_added:
	for (--i; i >= 2 * cur_qps; --i)
		teardown_vq(ndev, &ndev->vqs[i]);

	ndev->cur_num_vqs = 2 * cur_qps;

	return err;
}