MCAST_ALLOC_SIZE
new_len = (Adapter->mcast_alloc_count + MCAST_ALLOC_SIZE) *
Adapter->mcast_alloc_count += MCAST_ALLOC_SIZE;
MCAST_ALLOC_SIZE) {
new_len = (Adapter->mcast_alloc_count - MCAST_ALLOC_SIZE) *
Adapter->mcast_alloc_count -= MCAST_ALLOC_SIZE;