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net: pktgen: Observe needed_headroom of the device

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Allocate enough space so as not to force the outgoing net device to do
skb_realloc_headroom().

Signed-off-by: Bogdan Hamciuc <bogdan.hamciuc@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bogdan Hamciuc 2015-07-29 12:45:58 +03:00 committed by David S. Miller
parent 92a99bf3ba
commit 879c7220e8
1 changed files with 2 additions and 1 deletions
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3
net/core/pktgen.c
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@ -2279,7 +2279,7 @@ static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
{
pkt_dev->pkt_overhead = 0;
pkt_dev->pkt_overhead = LL_RESERVED_SPACE(pkt_dev->odev);
pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
@ -2788,6 +2788,7 @@ static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
} else {
skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
}
skb_reserve(skb, LL_RESERVED_SPACE(dev));
return skb;
}