qls_init_rss() built the RSS indirection table with rss_icb->cq_id[i] = (i & (ha->num_rx_rings - 1)); which assumes num_rx_rings is a power of two. When it is not, the AND mask leaves some completion queues with no entries and skews the hash
distribution.

MAX_RX_RINGS is currently hardcoded to 1, so this is latent today, but use a modulo so the table stays correct if the ring count is ever raised to a non-power-of-two value.