linux-kernel - Re: [net PATCH] net: stmmac: update priv->speed to SPEED

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Message-ID: <ZlcVYjOEBGm79Yc9@shell.armlinux.org.uk>
Date: Wed, 29 May 2024 12:45:38 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: xiaolei wang <xiaolei.wang@...driver.com>
Cc: alexandre.torgue@...s.st.com, joabreu@...opsys.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	mcoquelin.stm32@...il.com, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [net PATCH] net: stmmac: update priv->speed to SPEED_UNKNOWN
 when link down

On Wed, May 29, 2024 at 06:55:21PM +0800, xiaolei wang wrote:
> On 5/29/24 16:46, Russell King (Oracle) wrote:
> > To me, commit 1f705bc61aee ("net: stmmac: Add support for CBS QDISC")
> > just looks very buggy.
> 
> This makes sense. I think it is necessary to update the parameters after
> linking up.
> 
> Does anyone have a better suggestion?

Any setup that a phylink-based MAC driver does which is dependent on
the negotiated media parameters (e.g. speed, duplex etc) _should_
always be done from the .mac_link_up method.

So, from a phylink perspective, what you propose is the correct and
only way.

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