linux-kernel - Re: [PATCH net-next 12/13] net: phy: phylink: Use phy_caps

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Message-ID: <20250224144431.2dca9d19@kmaincent-XPS-13-7390>
Date: Mon, 24 Feb 2025 14:44:31 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: davem@...emloft.net, 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>, Heiner Kallweit
 <hkallweit1@...il.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
 linux-arm-kernel@...ts.infradead.org, Christophe Leroy
 <christophe.leroy@...roup.eu>, Herve Codina <herve.codina@...tlin.com>,
 Florian Fainelli <f.fainelli@...il.com>, Vladimir Oltean
 <vladimir.oltean@....com>, Oleksij Rempel <o.rempel@...gutronix.de>, Simon
 Horman <horms@...nel.org>, Romain Gantois <romain.gantois@...tlin.com>
Subject: Re: [PATCH net-next 12/13] net: phy: phylink: Use phy_caps_lookup
 for fixed-link configuration

On Sat, 22 Feb 2025 15:27:24 +0100
Maxime Chevallier <maxime.chevallier@...tlin.com> wrote:

> When phylink creates a fixed-link configuration, it finds a matching
> linkmode to set as the advertised, lp_advertising and supported modes
> based on the speed and duplex of the fixed link.
> 
> Use the newly introduced phy_caps_lookup to get these modes instead of
> phy_lookup_settings(). This has the side effect that the matched
> settings and configured linkmodes may now contain several linkmodes (the
> intersection of supported linkmodes from the phylink settings and the
> linkmodes that match speed/duplex) instead of the one from
> phy_lookup_settings().

...

>  
>  	linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, mask);
>  	linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask);
> @@ -588,9 +591,9 @@ static int phylink_parse_fixedlink(struct phylink *pl,
>  
>  	phylink_set(pl->supported, MII);
>  
> -	if (s) {
> -		__set_bit(s->bit, pl->supported);
> -		__set_bit(s->bit, pl->link_config.lp_advertising);
> +	if (c) {
> +		linkmode_or(pl->supported, pl->supported, match);
> +		linkmode_or(pl->link_config.lp_advertising,
> pl->supported, match);

You are doing the OR twice. You should use linkmode_copy() instead.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com