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

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Message-ID: <DM6PR11MB3306B786885299BC47096AD7B9DBA@DM6PR11MB3306.namprd11.prod.outlook.com>
Date:   Fri, 20 Oct 2023 03:33:16 +0000
From:   "Gan, Yi Fang" <yi.fang.gan@...el.com>
To:     Paolo Abeni <pabeni@...hat.com>,
        "Russell King (Oracle)" <linux@...linux.org.uk>
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>,
        "Maxime Coquelin" <mcoquelin.stm32@...il.com>,
        "Ong, Boon Leong" <boon.leong.ong@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Sit, Michael 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

Hi Russell King and Paolo,

Thank you for the feedbacks. I already submit V2 with the helper.

BR,
Fang

> -----Original Message-----
> From: Paolo Abeni <pabeni@...hat.com>
> Sent: Thursday, October 19, 2023 6:25 PM
> To: Russell King (Oracle) <linux@...linux.org.uk>; 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>;
> 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; Sit, Michael 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, 2023-10-18 at 08:25 +0100, Russell King (Oracle) wrote:
> > 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?
> 
> Indeed that looks both straight-forward and more robust.
> 
> @Gan, Yi Fang: please send a v2 introducing and using such helper, thanks!
> 
> Paolo