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net: stmmac: Always arm TX Timer at end of transmission start 

If TX Coalesce timer is enabled we should always arm it, otherwise we
may hit the case where an interrupt is missed and the TX Queue will
timeout.

Arming the timer does not necessarly mean it will run the tx_clean()
because this function is wrapped around NAPI launcher.

Fixes: 9125cdd1be ("stmmac: add the initial tx coalesce schema")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5.4-rM2-2.2.x-imx-squashed
Jose Abreu 2019-12-18 11:17:43 +01:00 committed by Fugang Duan
parent 1bb669aa64
commit 744f444fb2
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -3088,8 +3088,6 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_count_frames = 0;
stmmac_set_tx_ic(priv, desc);
priv->xstats.tx_set_ic_bit++;
} else {
stmmac_tx_timer_arm(priv, queue);
}
/* We've used all descriptors we need for this skb, however,
@ -3160,6 +3158,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * sizeof(*desc));
stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue);
stmmac_tx_timer_arm(priv, queue);
return NETDEV_TX_OK;
@ -3311,8 +3310,6 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_count_frames = 0;
stmmac_set_tx_ic(priv, desc);
priv->xstats.tx_set_ic_bit++;
} else {
stmmac_tx_timer_arm(priv, queue);
}
/* We've used all descriptors we need for this skb, however,
@ -3401,6 +3398,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * sizeof(*desc));
stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue);
stmmac_tx_timer_arm(priv, queue);
return NETDEV_TX_OK;