net/netvsc: do RSS across Rx queue only

If number of tx queues is greater than the number of rx queues;
the driver ends up allocating more channels than rx queues.
The problem is that the RSS indirection table is programmed such
that some packets will end up on a channel that would never be
polled. The fix is to limit the RSS indirection table by number
of rx queues not channels.

Fixes: 92d23a57cafe ("net/netvsc: support configuring RSS parameters")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
index 7bf5465..6010236 100644 (file)
--- a/drivers/net/netvsc/hn_ethdev.c
+++ b/drivers/net/netvsc/hn_ethdev.c
@@ -575,7 +575,7 @@ static int hn_dev_configure(struct rte_eth_dev *dev)
                                 dev->data->nb_tx_queues);
 
        for (i = 0; i < NDIS_HASH_INDCNT; i++)
-               hv->rss_ind[i] = i % hv->num_queues;
+               hv->rss_ind[i] = i % dev->data->nb_rx_queues;
 
        hn_rss_hash_init(hv, rss_conf);