[dpdk-dev] [PATCH v3 4/4] net/netvsc: don't enable RSS if only single receive queue

[Stephen Hemminger <stephen@networkplumber.org>]

If application has multiple transmit queues but only a single
receive queue, then do not enable RSS.

Fixes: 8b945a7f7dcb ("drivers/net: update Rx RSS hash offload capabilities")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/netvsc/hn_ethdev.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
index ac6610838008..85f43996a623 100644
--- a/drivers/net/netvsc/hn_ethdev.c
+++ b/drivers/net/netvsc/hn_ethdev.c
@@ -597,11 +597,14 @@ static int hn_dev_configure(struct rte_eth_dev *dev)
 			return err;
 		}
 
-		err = hn_rndis_conf_rss(hv, 0);
-		if (err) {
-			PMD_DRV_LOG(NOTICE,
-				    "initial RSS config failed");
-			return err;
+		if ((dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_RSS_HASH) &&
+		    dev->data->nb_rx_queues > 1) {
+			err = hn_rndis_conf_rss(hv, 0);
+			if (err) {
+				PMD_DRV_LOG(NOTICE,
+					    "initial RSS config failed");
+				return err;
+			}
 		}
 	}
 
-- 
2.20.1