AcoSail/kernel_optimize_test
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bnxt_en: Implement xmit_more.

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Do not write the TX doorbell if skb->xmit_more is set unless the TX
queue is full.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2017-05-29 19:06:09 -04:00 committed by David S. Miller
parent 434c975a8f
commit 4d172f21ce
1 changed files with 5 additions and 1 deletions
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4
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -463,6 +463,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
prod = NEXT_TX(prod);
txr->tx_prod = prod;
if (!skb->xmit_more)
bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | prod);
tx_done:
@ -470,6 +471,9 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
mmiowb();
if (unlikely(bnxt_tx_avail(bp, txr) <= MAX_SKB_FRAGS + 1)) {
if (skb->xmit_more && !tx_buf->is_push)
bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | prod);
netif_tx_stop_queue(txq);
/* netif_tx_stop_queue() must be done before checking