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net/mlx5e: Fix loopback self test when GRO is off 

[ Upstream commit ef7a3518f7 ]

When GRO is off, the transport header pointer in sk_buff is
initialized to network's header.

To find the udp header, instead of using udp_hdr() which assumes
skb_network_header was set, manually calculate the udp header offset.

Fixes: 0952da791c ("net/mlx5e: Add support for loopback selftest")
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Inbar Karmy 2017-12-07 17:26:33 +02:00 committed by Greg Kroah-Hartman
parent ff01f118d1
commit 5b5be45ed1
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c
View File

@ -216,7 +216,8 @@ mlx5e_test_loopback_validate(struct sk_buff *skb,
if (iph->protocol != IPPROTO_UDP)
goto out;
udph = udp_hdr(skb);
/* Don't assume skb_transport_header() was set */
udph = (struct udphdr *)((u8 *)iph + 4 * iph->ihl);
if (udph->dest != htons(9))
goto out;