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sch_cake: Use tc_skb_protocol() helper for getting packet protocol

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[ Upstream commit b2100cc56f ]

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Toke Høiland-Jørgensen
2019-04-04 15:01:33 +02:00
committed by Greg Kroah-Hartman
parent 5f72cb2ab5
commit 490532225e
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_cake.c
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@@ -1526,7 +1526,7 @@ 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)