SJA1110_HEADER_LEN
skb_push(skb, SJA1110_HEADER_LEN);
dsa_alloc_etype_header(skb, SJA1110_HEADER_LEN);
u8 *buf = dsa_etype_header_pos_rx(skb) + SJA1110_HEADER_LEN;
if (unlikely(!pskb_may_pull(skb, SJA1110_HEADER_LEN)))
skb_pull_rcsum(skb, SJA1110_HEADER_LEN);
dsa_strip_etype_header(skb, SJA1110_HEADER_LEN);
.needed_headroom = SJA1110_HEADER_LEN + VLAN_HLEN,