|| ppp->npmode[npi] != NPMODE_PASS) {
kfree_skb(skb);
} else {
- skb_pull(skb, 2); /* chop off protocol */
- skb_postpull_rcsum(skb, skb->data - 2, 2);
+ /* chop off protocol */
+ skb_pull_rcsum(skb, 2);
skb->dev = ppp->dev;
skb->protocol = htons(npindex_to_ethertype[npi]);
skb->mac.raw = skb->data;