From 4d172f21cefe896df8477940269b8d52129f8c87 Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Mon, 29 May 2017 19:06:09 -0400
Subject: [PATCH] bnxt_en: Implement xmit_more.
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>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index d7c1295c16cf..2c6af316d2de 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -463,13 +463,17 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
prod = NEXT_TX(prod);
txr->tx_prod = prod;
- bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | prod);
+ if (!skb->xmit_more)
+ bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | prod);
tx_done:
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
--
2.30.9