netdev - Re: [PATCH net-next] net: ethtool: phy: Clear the netdev context pointer for DUMP requests

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Message-ID: <20240912204438.629a3019@kernel.org>
Date: Thu, 12 Sep 2024 20:44:38 -0700
From: Jakub Kicinski <kuba@...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>, 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, Nathan Chancellor <nathan@...nel.org>, Antoine Tenart
 <atenart@...nel.org>, Marc Kleine-Budde <mkl@...gutronix.de>, Dan Carpenter
 <dan.carpenter@...aro.org>, Romain Gantois <romain.gantois@...tlin.com>,
 syzbot+e9ed4e4368d450c8f9db@...kaller.appspotmail.com
Subject: Re: [PATCH net-next] net: ethtool: phy: Clear the netdev context
 pointer for DUMP requests

On Wed, 11 Sep 2024 15:46:21 +0200 Maxime Chevallier wrote:
> +		/* Clear the context netdev pointer so avoid a netdev_put from
> +		 * the .done() callback
> +		 */
> +		ctx->phy_req_info->base.dev = NULL;

Why do we assign to req_base.dev in the first place?
req is for the parsed request in my mind, and I don't
see anything in the PHY dump handlers actually using dev?