{
u16 *lan9303_tag;
unsigned int source_port;
+ u16 ether_type_nw;
+ u8 ip_protocol;
if (unlikely(!pskb_may_pull(skb, LAN9303_TAG_LEN))) {
dev_warn_ratelimited(&dev->dev,
skb->offload_fwd_mark = !ether_addr_equal(skb->data - ETH_HLEN,
eth_stp_addr);
+ /* We also need IGMP packets to have skb->offload_fwd_mark = 0.
+ * Solving this for all conceivable situations would add more cost to
+ * every packet. Instead we handle just the common case:
+ * No VLAN tag + Ethernet II framing.
+ * Test least probable term first.
+ */
+ ether_type_nw = lan9303_tag[2];
+ ip_protocol = *(skb->data + 9);
+ if (ip_protocol == IPPROTO_IGMP && ether_type_nw == htons(ETH_P_IP))
+ skb->offload_fwd_mark = 0;
+
return skb;
}