- if (vnic->rx_queue_cnt > 1)
- rc = bnxt_vnic_rss_configure(bp, vnic);
+ rc = bnxt_vnic_rss_configure(bp, vnic);
+ }
+
+ if (BNXT_CHIP_THOR(bp)) {
+ /* Compute current number of active receive queues. */
+ for (i = vnic->start_grp_id; i < vnic->end_grp_id; i++)
+ if (bp->rx_queues[i]->rx_started)
+ active_queue_cnt++;
+
+ /*
+ * For Thor, we need to ensure that the VNIC default receive
+ * ring corresponds to an active receive queue. When no queue
+ * is active, we need to temporarily set the MRU to zero so
+ * that packets are dropped early in the receive pipeline in
+ * order to prevent the VNIC default receive ring from being
+ * accessed.
+ */
+ if (active_queue_cnt == 0) {
+ uint16_t saved_mru = vnic->mru;
+
+ vnic->mru = 0;
+ /* Reconfigure default receive ring and MRU. */
+ bnxt_hwrm_vnic_cfg(bp, vnic);
+ vnic->mru = saved_mru;
+ } else {
+ /* Reconfigure default receive ring. */
+ bnxt_hwrm_vnic_cfg(bp, vnic);
+ }