net: ena: fix incorrect default RSS key
authorArthur Kiyanovski <akiyano@amazon.com>
Tue, 11 Feb 2020 15:17:43 +0000 (15:17 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 5 Mar 2020 15:42:14 +0000 (16:42 +0100)
commit4add6f2a0e7d16410ddae18024e02b66f483413a
tree79fbe43b25fa70961fc8d55f0fbaddba9617d50a
parent749b941dc05933fd559dbb98013b776e54e366b3
net: ena: fix incorrect default RSS key

[ Upstream commit 0d1c3de7b8c78a5e44b74b62ede4a63629f5d811 ]

Bug description:
When running "ethtool -x <if_name>" the key shows up as all zeros.

When we use "ethtool -X <if_name> hfunc toeplitz hkey <some:random:key>" to
set the key and then try to retrieve it using "ethtool -x <if_name>" then
we return the correct key because we return the one we saved.

Bug cause:
We don't fetch the key from the device but instead return the key
that we have saved internally which is by default set to zero upon
allocation.

Fix:
This commit fixes the issue by initializing the key to a random value
using netdev_rss_key_fill().

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/net/ethernet/amazon/ena/ena_com.c
drivers/net/ethernet/amazon/ena/ena_com.h