[dpdk-dev] [PATCH 1/2] mlx5: fix overwritten RSS configuration

[Nelio Laranjeiro <nelio.laranjeiro@6wind.com>]

RSS configuration provided by the application should not be used as storage
by the PMD.

Fixes: 2f97422e7759 ("mlx5: support RSS hash update and get")

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---
 drivers/net/mlx5/mlx5.h        | 1 +
 drivers/net/mlx5/mlx5_ethdev.c | 1 +
 drivers/net/mlx5/mlx5_rss.c    | 7 ++-----
 drivers/net/mlx5/mlx5_rxq.c    | 2 +-
 4 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index d012f50..d6c08bb 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -122,6 +122,7 @@ struct priv {
 	unsigned int hash_rxqs_n; /* Hash RX QPs array size. */
 	/* RSS configuration array indexed by hash RX queue type. */
 	struct rte_eth_rss_conf *(*rss_conf)[];
+	uint64_t rss_hf; /* RSS DPDK bit field of active RSS. */
 	struct rte_intr_handle intr_handle; /* Interrupt handler. */
 	unsigned int (*reta_idx)[]; /* RETA index table. */
 	unsigned int reta_idx_n; /* RETA index size. */
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 66115d2..aa67623 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -447,6 +447,7 @@ dev_configure(struct rte_eth_dev *dev)
 	unsigned int j;
 	unsigned int reta_idx_n;
 
+	priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 	priv->rxqs = (void *)dev->data->rx_queues;
 	priv->txqs = (void *)dev->data->tx_queues;
 	if (txqs_n != priv->txqs_n) {
diff --git a/drivers/net/mlx5/mlx5_rss.c b/drivers/net/mlx5/mlx5_rss.c
index 7eb688a..e73cd9d 100644
--- a/drivers/net/mlx5/mlx5_rss.c
+++ b/drivers/net/mlx5/mlx5_rss.c
@@ -162,11 +162,8 @@ mlx5_rss_hash_update(struct rte_eth_dev *dev,
 						rss_hash_default_key_len,
 						ETH_RSS_PROTO_MASK);
 
-	/* Store the configuration set into port configure.
-	 * This will enable/disable hash RX queues associated to the protocols
-	 * enabled/disabled by this update. */
-	priv->dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
-		rss_conf->rss_hf;
+	/* Store protocols for which RSS is enabled. */
+	priv->rss_hf = rss_conf->rss_hf;
 	priv_unlock(priv);
 	assert(err >= 0);
 	return -err;
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index c8af77f..cbb017b 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -312,7 +312,7 @@ priv_make_ind_table_init(struct priv *priv,
 	/* Mandatory to receive frames not handled by normal hash RX queues. */
 	unsigned int hash_types_sup = 1 << HASH_RXQ_ETH;
 
-	rss_hf = priv->dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
+	rss_hf = priv->rss_hf;
 	/* Process other protocols only if more than one queue. */
 	if (priv->rxqs_n > 1)
 		for (i = 0; (i != hash_rxq_init_n); ++i)
-- 
2.1.4