[PATCH v5 21/40] net/igc: check RSS hash algorithms

[Jie Hai]

A new field 'algorithm' has been added to rss_conf, check it
in case of ignoring unsupported values.

Signed-off-by: Jie Hai <haijie1 at huawei.com>
---
 drivers/net/igc/igc_ethdev.c | 4 ++++
 drivers/net/igc/igc_txrx.c   | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/net/igc/igc_ethdev.c b/drivers/net/igc/igc_ethdev.c
index 58c4f8092772..11c0f5ff231b 100644
--- a/drivers/net/igc/igc_ethdev.c
+++ b/drivers/net/igc/igc_ethdev.c
@@ -2442,6 +2442,10 @@ eth_igc_rss_hash_update(struct rte_eth_dev *dev,
 			struct rte_eth_rss_conf *rss_conf)
 {
 	struct igc_hw *hw = IGC_DEV_PRIVATE_HW(dev);
+
+	if (rss_conf->algorithm != RTE_ETH_HASH_FUNCTION_DEFAULT)
+		return -EINVAL;
+
 	igc_hw_rss_hash_set(hw, rss_conf);
 	return 0;
 }
diff --git a/drivers/net/igc/igc_txrx.c b/drivers/net/igc/igc_txrx.c
index 5c60e3e99709..5e62e00d2ad9 100644
--- a/drivers/net/igc/igc_txrx.c
+++ b/drivers/net/igc/igc_txrx.c
@@ -818,6 +818,7 @@ igc_rss_configure(struct rte_eth_dev *dev)
 	rss_conf = dev->data->dev_conf.rx_adv_conf.rss_conf;
 	if (rss_conf.rss_key == NULL)
 		rss_conf.rss_key = default_rss_key;
+
 	igc_hw_rss_hash_set(hw, &rss_conf);
 }
 
@@ -958,6 +959,10 @@ igc_dev_mq_rx_configure(struct rte_eth_dev *dev)
 		return -EINVAL;
 	}
 
+	if (dev->data->dev_conf.rx_adv_conf.rss_conf.algorithm !=
+	    RTE_ETH_HASH_FUNCTION_DEFAULT)
+		return -EINVAL;
+
 	switch (dev->data->dev_conf.rxmode.mq_mode) {
 	case RTE_ETH_MQ_RX_RSS:
 		igc_rss_configure(dev);
-- 
2.30.0