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Commit 742c3afe authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann
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ieee802154: 6lowpan: trivial checks at first 



This patch moves some trivial checks at first before calling
skb_share_check which could do some memcpy if the buffer is shared.

Reviewed-by: default avatarStefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent ad23d5b9

net/ieee802154/6lowpan/rx.c

+2 −4
Original line number Diff line number Diff line
@@ -63,7 +63,8 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *wdev, 
	struct net_device *ldev;

	int ret;



	if (wdev->type != ARPHRD_IEEE802154)

	if (wdev->type != ARPHRD_IEEE802154 ||

	    skb->pkt_type == PACKET_OTHERHOST)

		goto drop;



	ldev = wdev->ieee802154_ptr->lowpan_dev;
@@ -74,9 +75,6 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *wdev, 
	if (!skb)

		goto drop;



	if (skb->pkt_type == PACKET_OTHERHOST)

		goto drop_skb;



	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)

		goto drop_skb;