diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2023-09-07 12:46:31 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-11 08:22:47 +0100 |
| commit | fa60b8163816f194786f3ee334c9a458da7699c6 (patch) | |
| tree | 1c7d850b007f44ae0b03055d7df0802e8b490c09 | |
| parent | 6eadb0b3d085ccbed224599d131425611506c018 (diff) | |
| download | linux-fa60b8163816f194786f3ee334c9a458da7699c6.tar.gz | |
net: stmmac: fix handling of zero coalescing tx-usecs
Setting ethtool -C eth0 tx-usecs 0 is supposed to disable the use of the
coalescing timer but currently it gets programmed with zero delay
instead.
Disable the use of the coalescing timer if tx-usecs is zero by
preventing it from being restarted. Note that to keep things simple we
don't start/stop the timer when the coalescing settings are changed, but
just let that happen on the next transmit or timer expiry.
Fixes: 8fce33317023 ("net: stmmac: Rework coalesce timer and fix multi-queue races")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 9a3182b9e767c5..2206789802bf78 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2704,9 +2704,7 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) /* We still have pending packets, let's call for a new scheduling */ if (tx_q->dirty_tx != tx_q->cur_tx) - hrtimer_start(&tx_q->txtimer, - STMMAC_COAL_TIMER(priv->tx_coal_timer[queue]), - HRTIMER_MODE_REL); + stmmac_tx_timer_arm(priv, queue); flags = u64_stats_update_begin_irqsave(&tx_q->txq_stats.syncp); tx_q->txq_stats.tx_packets += tx_packets; @@ -2995,9 +2993,13 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv) static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue) { struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue]; + u32 tx_coal_timer = priv->tx_coal_timer[queue]; + + if (!tx_coal_timer) + return; hrtimer_start(&tx_q->txtimer, - STMMAC_COAL_TIMER(priv->tx_coal_timer[queue]), + STMMAC_COAL_TIMER(tx_coal_timer), HRTIMER_MODE_REL); } |