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net: ena: rss: fix failure to get indirection table

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[ 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 <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sameeh Jubran 2020-02-11 15:17:45 +00:00 committed by Greg Kroah-Hartman
parent 304b62b5f4
commit 092a63301b
1 changed files with 14 additions and 0 deletions
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14
drivers/net/ethernet/amazon/ena/ena_ethtool.c
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@ -660,7 +660,21 @@ 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;