tree 724f16d51dcbf8d99a4798ee04f1cbded710d219
parent e66876452456a209daa7e1bc63539d9be50d9ad6
author Jesper Dangaard Brouer <brouer@redhat.com> 1495476787 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1523641684 +0200

mlx5: fix bug reading rss_hash_type from CQE


[ Upstream commit 12e8b570e732eaa5eae3a2895ba3fbcf91bde2b4 ]

Masks for extracting part of the Completion Queue Entry (CQE)
field rss_hash_type was swapped, namely CQE_RSS_HTYPE_IP and
CQE_RSS_HTYPE_L4.

The bug resulted in setting skb->l4_hash, even-though the
rss_hash_type indicated that hash was NOT computed over the
L4 (UDP or TCP) part of the packet.

Added comments from the datasheet, to make it more clear what
these masks are selecting.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>