linux-kernel - Re: [PATCH net] net: stmmac: fix handling of zero coalescing tx-usecs

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Message-ID: <20230905135103.04649841@kernel.org>
Date:   Tue, 5 Sep 2023 13:51:03 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vincent Whitchurch <vincent.whitchurch@...s.com>
Cc:     Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Felix Fietkau <nbd@....name>,
        Maxim Mikityanskiy <maxtram95@...il.com>,
        <netdev@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...s.com>
Subject: Re: [PATCH net] net: stmmac: fix handling of zero coalescing
 tx-usecs

On Tue, 5 Sep 2023 13:32:48 +0200 Vincent Whitchurch wrote:
> 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@...s.com>

This does not apply cleanly to net, please rebase and repost.
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