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Commit 1007f59d authored by Alexander Duyck's avatar Alexander Duyck Committed by David S. Miller
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net: skb_defer_rx_timestamp should check for phydev before setting up classify 



This change makes it so that the call skb_defer_rx_timestamp will first
check for a phydev before going in and manipulating the skb->data and
skb->len values.  By doing this we can avoid unnecessary work on network
devices that don't support phydev.  As a result we reduce the total
instruction count needed to process this on most devices.

Signed-off-by: default avatarAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2251ae46

net/core/timestamping.c

+5 −1
Original line number Diff line number Diff line
@@ -60,11 +60,15 @@ bool skb_defer_rx_timestamp(struct sk_buff *skb) 
	struct phy_device *phydev;

	unsigned int type;



	if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->drv)

		return false;



	if (skb_headroom(skb) < ETH_HLEN)

		return false;



	__skb_push(skb, ETH_HLEN);



	type = classify(skb);

	type = ptp_classify_raw(skb);



	__skb_pull(skb, ETH_HLEN);