diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2023-09-07 13:46:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-19 13:28:08 +0300 |
| commit | 9dbbc87d5b61606fbf9e84e921006174693865a2 (patch) | |
| tree | 2572fe3c3d937d6de0a0eccabe9835ad1d3dd82c | |
| parent | 70c8d17007dc4a07156b7da44509527990e569b3 (diff) | |
| download | linux-9dbbc87d5b61606fbf9e84e921006174693865a2.tar.xz | |
net: stmmac: fix handling of zero coalescing tx-usecs
[ Upstream commit fa60b8163816f194786f3ee334c9a458da7699c6 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 a07bcb2f5d2e..1559a4dafd41 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2692,9 +2692,7 @@ 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); __netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue)); @@ -2975,9 +2973,13 @@ 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); } |