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net: lan966x: Fix IGMP snooping when frames have vlan tag

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In case an IGMP frame has a vlan tag, then the function
lan966x_hw_offload couldn't figure out that is a IGMP frame. Therefore
the SW thinks that the frame was already forward by the HW which is not
true.
Extend lan966x_hw_offload to pop the vlan tag if are any and then check
for IGMP frames.

Fixes: 47aeea0d57 ("net: lan966x: Implement the callback SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED ")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Horatiu Vultur 2022-04-09 20:41:41 +02:00 committed by Jakub Kicinski
parent eb9c0d671e
commit 6476f90aef
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/microchip/lan966x/lan966x_main.c
View file

@ -446,6 +446,12 @@ static bool lan966x_hw_offload(struct lan966x *lan966x, u32 port,
ANA_CPU_FWD_CFG_MLD_REDIR_ENA)))
return true;
if (eth_type_vlan(skb->protocol)) {
skb = skb_vlan_untag(skb);
if (unlikely(!skb))
return false;
}
if (skb->protocol == htons(ETH_P_IP) &&
ip_hdr(skb)->protocol == IPPROTO_IGMP)
return false;