From: David Miller <davem@davemloft.net>
To: Jose.Abreu@synopsys.com
Cc: netdev@vger.kernel.org, Joao.Pinto@synopsys.com,
peppe.cavallaro@st.com, alexandre.torgue@st.com,
mcoquelin.stm32@gmail.com,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, ben@decadent.org.uk
Subject: Re: [PATCH net] net: stmmac: Re-work the queue selection for TSO packets
Date: Mon, 08 Jul 2019 12:41:25 -0700 (PDT) [thread overview]
Message-ID: <20190708.124125.1938757647213542470.davem@davemloft.net> (raw)
In-Reply-To: <36018491f47206728e04d67a9e6263635e64f721.1562588640.git.joabreu@synopsys.com>
From: Jose Abreu <Jose.Abreu@synopsys.com>
Date: Mon, 8 Jul 2019 14:26:28 +0200
> Ben Hutchings says:
> "This is the wrong place to change the queue mapping.
> stmmac_xmit() is called with a specific TX queue locked,
> and accessing a different TX queue results in a data race
> for all of that queue's state.
>
> I think this commit should be reverted upstream and in all
> stable branches. Instead, the driver should implement the
> ndo_select_queue operation and override the queue mapping there."
>
> Fixes: c5acdbee22a1 ("net: stmmac: Send TSO packets always from Queue 0")
> Suggested-by: Ben Hutchings <ben@decadent.org.uk>
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Applied and queued up for -stable.
prev parent reply other threads:[~2019-07-08 19:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-08 12:26 [PATCH net] net: stmmac: Re-work the queue selection for TSO packets Jose Abreu
2019-07-08 19:41 ` David Miller [this message]
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