linux-kernel - Re: [PATCH v2 net 1/2] net: phylink: add lock for serializing concurrent pl->phydev writes with resolver

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Message-ID: <20250903184858.GF361157@horms.kernel.org>
Date: Wed, 3 Sep 2025 19:48:58 +0100
From: Simon Horman <horms@...nel.org>
To: Vladimir Oltean <vladimir.oltean@....com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net 1/2] net: phylink: add lock for serializing
 concurrent pl->phydev writes with resolver

On Wed, Sep 03, 2025 at 06:23:47PM +0300, Vladimir Oltean wrote:

...

> @@ -1582,8 +1584,11 @@ static void phylink_resolve(struct work_struct *w)
>  	struct phylink_link_state link_state;
>  	bool mac_config = false;
>  	bool retrigger = false;
> +	struct phy_device *phy;
>  	bool cur_link_state;
>  
> +	mutex_lock(&pl->phy_lock);
> +	phy = pl->phydev;

Hi Vladimir,

I guess this is an artifact of the development of this patchset.
Whatever the case, phy is set but otherwise unused in this function.

This makes CI lightup like a Christmas tree.
And it's a bit too early in the year for that.

>  	mutex_lock(&pl->state_mutex);
>  	cur_link_state = phylink_link_is_up(pl);
>  

...

-- 
pw-bot: cr