[dpdk-dev] [PATCH v2 2/2] net/netvsc: disable before changing RSS parameters

[Stephen Hemminger <stephen@networkplumber.org>]

In order to change RSS parameters, the host requires that RSS
is disable first.

Fixes: 92d23a57cafe ("net/netvsc: support configuring RSS parameters")
Cc: stable@dpdk.org
Tested-by: Abhishek Marathe <abmarath@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/netvsc/hn_ethdev.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
index 5ef7a452cc69..159116f7f691 100644
--- a/drivers/net/netvsc/hn_ethdev.c
+++ b/drivers/net/netvsc/hn_ethdev.c
@@ -292,6 +292,13 @@ static int hn_rss_reta_update(struct rte_eth_dev *dev,
 			hv->rss_ind[i] = reta_conf[idx].reta[shift];
 	}
 
+	err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
+	if (err) {
+		PMD_DRV_LOG(NOTICE,
+			"rss disable failed");
+		return err;
+	}
+
 	err = hn_rndis_conf_rss(hv, 0);
 	if (err) {
 		PMD_DRV_LOG(NOTICE,
@@ -579,6 +586,13 @@ static int hn_dev_configure(struct rte_eth_dev *dev)
 			return err;
 		}
 
+		err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
+		if (err) {
+			PMD_DRV_LOG(NOTICE,
+				"rss disable failed");
+			return err;
+		}
+
 		err = hn_rndis_conf_rss(hv, 0);
 		if (err) {
 			PMD_DRV_LOG(NOTICE,
-- 
2.20.1