From: Arthur Kiyanovski akiyano@amazon.com
commit 470793a78ce344bd53d31e0c2d537f71ba957547 upstream.
As the name suggests ETH_RSS_HASH_NO_CHANGE is received upon changing the key or indirection table using ethtool while keeping the same hash function.
Also add a function for retrieving the current hash function from the ena-com layer.
Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)") Signed-off-by: Sameeh Jubran sameehj@amazon.com Signed-off-by: Saeed Bshara saeedb@amazon.com Signed-off-by: Arthur Kiyanovski akiyano@amazon.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/ethernet/amazon/ena/ena_com.c | 5 +++++ drivers/net/ethernet/amazon/ena/ena_com.h | 8 ++++++++ drivers/net/ethernet/amazon/ena/ena_ethtool.c | 3 +++ 3 files changed, 16 insertions(+)
--- a/drivers/net/ethernet/amazon/ena/ena_com.c +++ b/drivers/net/ethernet/amazon/ena/ena_com.c @@ -1046,6 +1046,11 @@ static int ena_com_get_feature(struct en feature_ver); }
+int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev) +{ + return ena_dev->rss.hash_func; +} + static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev) { struct ena_admin_feature_rss_flow_hash_control *hash_key = --- a/drivers/net/ethernet/amazon/ena/ena_com.h +++ b/drivers/net/ethernet/amazon/ena/ena_com.h @@ -656,6 +656,14 @@ int ena_com_rss_init(struct ena_com_dev */ void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
+/* ena_com_get_current_hash_function - Get RSS hash function + * @ena_dev: ENA communication layer struct + * + * Return the current hash function. + * @return: 0 or one of the ena_admin_hash_functions values. + */ +int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev); + /* ena_com_fill_hash_function - Fill RSS hash function * @ena_dev: ENA communication layer struct * @func: The hash function (Toeplitz or crc) --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c @@ -736,6 +736,9 @@ static int ena_set_rxfh(struct net_devic }
switch (hfunc) { + case ETH_RSS_HASH_NO_CHANGE: + func = ena_com_get_current_hash_function(ena_dev); + break; case ETH_RSS_HASH_TOP: func = ENA_ADMIN_TOEPLITZ; break;