From: Alexander Aring Date: Wed, 30 Oct 2013 08:18:24 +0000 (+0100) Subject: 6lowpan: cleanup skb copy data X-Git-Tag: firefly_0821_release~176^2~4992^2~91^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3582b900ad2c1e218e4963060ba6dcf757cb702e;p=firefly-linux-kernel-4.4.55.git 6lowpan: cleanup skb copy data This patch drops the direct memcpy on skb and uses the right skb memcpy functions. Also remove an unnecessary check if plen is non zero. Signed-off-by: Alexander Aring Reviewed-by: Werner Almesberger Signed-off-by: David S. Miller --- diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c index 58c07fd967d1..9497c6f3276b 100644 --- a/net/ieee802154/6lowpan.c +++ b/net/ieee802154/6lowpan.c @@ -1122,12 +1122,15 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head, frag->priority = skb->priority; /* copy header, MFR and payload */ - memcpy(skb_put(frag, mlen), skb->data, mlen); - memcpy(skb_put(frag, hlen), head, hlen); + skb_put(frag, mlen); + skb_copy_to_linear_data(frag, skb_mac_header(skb), mlen); - if (plen) - skb_copy_from_linear_data_offset(skb, offset + mlen, - skb_put(frag, plen), plen); + skb_put(frag, hlen); + skb_copy_to_linear_data_offset(frag, mlen, head, hlen); + + skb_put(frag, plen); + skb_copy_to_linear_data_offset(frag, mlen + hlen, + skb_network_header(skb) + offset, plen); lowpan_raw_dump_table(__func__, " raw fragment dump", frag->data, frag->len);