forked from luck/tmp_suning_uos_patched
virtio: change comment in transmit
The original comment was not really informative or funny as well as sexist. Replace it with a better explanation of why the driver does stop and what the impacts are. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -939,8 +939,12 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
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skb_orphan(skb);
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nf_reset(skb);
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/* Apparently nice girls don't return TX_BUSY; stop the queue
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* before it gets out of hand. Naturally, this wastes entries. */
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/* It is better to stop queue if running out of space
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* instead of forcing queuing layer to requeue the skb
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* by returning TX_BUSY (and cause a BUG message).
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* Since most packets only take 1 or 2 ring slots
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* this means 16 slots are typically wasted.
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*/
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if (sq->vq->num_free < 2+MAX_SKB_FRAGS) {
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netif_stop_subqueue(dev, qnum);
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if (unlikely(!virtqueue_enable_cb_delayed(sq->vq))) {
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