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Code Issues Releases Wiki Activity

nfp: TX time stamp packets before HW doorbell is rung

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TX completion may happen any time after HW queue was kicked.
We can't access the skb afterwards.  Move the time stamping
before ringing the doorbell.

Fixes: 4c3523623d ("net: add driver for Netronome NFP4000/NFP6000 NIC VFs")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-08-23 14:41:50 -07:00 committed by David S. Miller
parent ee6c88bb75
commit 46f1c52e66
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -895,6 +895,8 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
netdev_tx_sent_queue(nd_q, txbuf->real_len);
skb_tx_timestamp(skb);
tx_ring->wr_p += nr_frags + 1;
if (nfp_net_tx_ring_should_stop(tx_ring))
nfp_net_tx_ring_stop(nd_q, tx_ring);
@ -903,8 +905,6 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
if (!skb->xmit_more || netif_xmit_stopped(nd_q))
nfp_net_tx_xmit_more_flush(tx_ring);
skb_tx_timestamp(skb);
return NETDEV_TX_OK;
err_unmap: