viona_ring_lease_renew
boolean_t viona_ring_lease_renew(viona_vring_t *);
if (!viona_ring_lease_renew(ring)) {
if (!viona_ring_lease_renew(ring)) {
if (!viona_ring_lease_renew(ring)) {
if (!viona_ring_lease_renew(ring)) {
viona_ring_lease_renew(ring);