[PATCH net-next 4/9] net: dsa: tag_ocelot: do not rely on skb_mac_header() for VLAN xmit

From: Vladimir Oltean
Date: Wed Mar 22 2023 - 19:39:13 EST


skb_mac_header() will no longer be available in the TX path when
reverting commit 6d1ccff62780 ("net: reset mac header in
dev_start_xmit()"). As preparation for that, let's use
skb_vlan_eth_hdr() to get to the VLAN header instead, which assumes it's
located at skb->data (assumption which holds true here).

Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
---
net/dsa/tag_ocelot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/dsa/tag_ocelot.c b/net/dsa/tag_ocelot.c
index 28ebecafdd24..73ee09de1a3a 100644
--- a/net/dsa/tag_ocelot.c
+++ b/net/dsa/tag_ocelot.c
@@ -26,7 +26,7 @@ static void ocelot_xmit_get_vlan_info(struct sk_buff *skb, struct dsa_port *dp,
return;
}

- hdr = (struct vlan_ethhdr *)skb_mac_header(skb);
+ hdr = skb_vlan_eth_hdr(skb);
br_vlan_get_proto(br, &proto);

if (ntohs(hdr->h_vlan_proto) == proto) {
--
2.34.1