linux-kernel - Re: [PATCH net 1/1] net: stmmac: update MAC capabilities when tx queues are updated

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Message-ID: <ZS+IUo5q/AnYm1Gb@shell.armlinux.org.uk>
Date:   Wed, 18 Oct 2023 08:25:06 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     "Gan, Yi Fang" <yi.fang.gan@...el.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>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
        Looi Hong Aun <hong.aun.looi@...el.com>,
        Voon Weifeng <weifeng.voon@...el.com>,
        Song Yoong Siang <yoong.siang.song@...el.com>
Subject: Re: [PATCH net 1/1] net: stmmac: update MAC capabilities when tx
 queues are updated

On Wed, Oct 18, 2023 at 10:31:36AM +0800, Gan, Yi Fang wrote:
> From: Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>
> 
> Upon boot up, the driver will configure the MAC capabilities based on
> the maximum number of tx and rx queues. When the user changes the
> tx queues to single queue, the MAC should be capable of supporting Half
> Duplex, but the driver does not update the MAC capabilities when it is
> configured so.
> 
> Using the stmmac_reinit_queues() to check the number of tx queues
> and set the MAC capabilities accordingly.

There is other setup elsewhere in the driver that fiddles with this in
stmmac_phy_setup(). Maybe provide a helper function so that this
decision making can be made in one function called from both these
locations, so if the decision making for HD support changes, only one
place needs changing?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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