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smsc9420: fix race in transmit time stamping.

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Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2011-06-19 03:31:44 +00:00 committed by David S. Miller
parent 52f64faeb0
commit 6241207253
1 changed files with 2 additions and 2 deletions
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4
drivers/net/smsc9420.c
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@ -1031,12 +1031,12 @@ static netdev_tx_t smsc9420_hard_start_xmit(struct sk_buff *skb,
pd->tx_ring[index].status = TDES0_OWN_;
wmb();
skb_tx_timestamp(skb);
/* kick the DMA */
smsc9420_reg_write(pd, TX_POLL_DEMAND, 1);
smsc9420_pci_flush_write(pd);
skb_tx_timestamp(skb);
return NETDEV_TX_OK;
}