提交 ddd0ca5d 编写于 作者: F Florian Fainelli 提交者: David S. Miller

net: bcmgenet: add support for xmit_more

Delay the update of the TDMA producer index unless this is the last SKB
in a batch, or the queue is already stopped. Move the check for whether
the queue should be stopped before the xmit_more check to avoid locking
the transmit queue in case there was a SKB submitted which has xmit_more
set.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 ae67bf01
......@@ -1316,12 +1316,13 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
ring->prod_index += nr_frags + 1;
ring->prod_index &= DMA_P_INDEX_MASK;
bcmgenet_tdma_ring_writel(priv, ring->index,
ring->prod_index, TDMA_PROD_INDEX);
if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
netif_tx_stop_queue(txq);
if (!skb->xmit_more || netif_xmit_stopped(txq))
/* Packets are ready, update producer index */
bcmgenet_tdma_ring_writel(priv, ring->index,
ring->prod_index, TDMA_PROD_INDEX);
out:
spin_unlock_irqrestore(&ring->lock, flags);
......
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