# \[PATCH AUTOSEL 4.9 10/16\] net: ena: rss: fix failure to get indirection table - From: Sasha Levin \ - Date: 2020-02-23 02:26:00 - List: netdev - Page: https://ratatoskr.run/netdev/2020/02/5872129 - Thread: https://ratatoskr.run/stable/2020/02/5872133/t.md ```text From: Sameeh Jubran [ Upstream commit 0c8923c0a64fb5d14bebb9a9065d2dc25ac5e600 ] On old hardware, getting / setting the hash function is not supported while gettting / setting the indirection table is. This commit enables us to still show the indirection table on older hardwares by setting the hash function and key to NULL. Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)") Signed-off-by: Sameeh Jubran Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/amazon/ena/ena_ethtool.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c index d85fe0de28dba..8c44ac7232ba2 100644 --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c @@ -663,7 +663,21 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, if (rc) return rc; + /* We call this function in order to check if the device + * supports getting/setting the hash function. + */ rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key); + + if (rc) { + if (rc == -EOPNOTSUPP) { + key = NULL; + hfunc = NULL; + rc = 0; + } + + return rc; + } + if (rc) return rc; -- 2.20.1 ```