linux-kernel - Re: [PATCH net-next 0/2] Fix phy_link

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Date: Sun, 12 May 2024 23:36:36 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
	Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Herve Codina <herve.codina@...tlin.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Köry Maincent <kory.maincent@...tlin.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Marek Behún <kabel@...nel.org>,
	Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Nicolò Veronese <nicveronese@...il.com>,
	Simon Horman <horms@...nel.org>, mwojtas@...omium.org,
	Antoine Tenart <atenart@...nel.org>
Subject: Re: [PATCH net-next 0/2] Fix phy_link_topology initialization

Hi Maxime,

On Tue, May 07, 2024 at 12:28:19PM +0200, Maxime Chevallier wrote:
> Nathan and Heiner reported issues that occur when phylib and phy drivers
> built as modules expect the phy_link_topology to be initialized, due to
> wrong use of IS_REACHABLE.
> 
> This small fixup series addresses that by moving the initialization code
> into net/core/dev.c, but at the same time implementing lazy
> initialization to only allocate the topology upon the first PHY
> insertion.
> 
> This needed some refactoring, namely pass the netdevice itself as a
> parameter for phy_link_topology helpers.
> 
> Thanks Heiner for the help on untangling this, and Nathan for the
> report.

Are you able to prioritize getting this series merged? This has been a
problem in -next for over a month now and the merge window is now open.
I would hate to see this regress in mainline, as my main system may be
affected by it (not sure, I got a new test machine that got bit by it in
addition to the other two I noticed it on).

Cheers,
Nathan