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tg3: Add skb->xmit_more support
Ring TX doorbell only if xmit_more is not set or the queue is stopped. Suggested-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Prashant Sreedharan <prashant@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 6 additions and 4 deletions
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@ -8099,9 +8099,6 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
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/* Sync BD data before updating mailbox */
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wmb();
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/* Packets are ready, update Tx producer idx local and on card. */
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tw32_tx_mbox(tnapi->prodmbox, entry);
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tnapi->tx_prod = entry;
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if (unlikely(tg3_tx_avail(tnapi) <= (MAX_SKB_FRAGS + 1))) {
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netif_tx_stop_queue(txq);
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@ -8116,7 +8113,12 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
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netif_tx_wake_queue(txq);
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}
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mmiowb();
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if (!skb->xmit_more || netif_xmit_stopped(txq)) {
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/* Packets are ready, update Tx producer idx on card. */
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tw32_tx_mbox(tnapi->prodmbox, entry);
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mmiowb();
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}
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return NETDEV_TX_OK;
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dma_error:
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