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sch_cake: Use tc_skb_protocol() helper for getting packet protocol

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We shouldn't be using skb->protocol directly as that will miss cases with
hardware-accelerated VLAN tags. Use the helper instead to get the right
protocol number.

Reported-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Toke Høiland-Jørgensen 2019-04-04 15:01:33 +02:00 committed by David S. Miller
parent aecfde2310
commit b2100cc56f
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_cake.c
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@ -1519,7 +1519,7 @@ static u8 cake_handle_diffserv(struct sk_buff *skb, u16 wash)
{
u8 dscp;
switch (skb->protocol) {
switch (tc_skb_protocol(skb)) {
case htons(ETH_P_IP):
dscp = ipv4_get_dsfield(ip_hdr(skb)) >> 2;
if (wash && dscp)