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Message-ID: <20240613181812.27d02c88@kernel.org>
Date: Thu, 13 Jun 2024 18:18:12 -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>
Subject: Re: [PATCH net-next v13 07/13] net: ethtool: Introduce a command to
 list PHYs on an interface

On Fri,  7 Jun 2024 09:18:20 +0200 Maxime Chevallier wrote:
> +                                                it's parent PHY through an SFP

its

> +static int ethnl_phy_parse_request(struct ethnl_req_info *req_base,
> +				   struct nlattr **tb)
> +{
> +	struct phy_link_topology *topo = req_base->dev->link_topo;
> +	struct phy_req_info *req_info = PHY_REQINFO(req_base);
> +	struct phy_device_node *pdn;
> +
> +	if (!req_base->phydev)
> +		return 0;
> +
> +	if (!topo)
> +		return 0;
> +
> +	pdn = xa_load(&topo->phys, req_base->phydev->phyindex);
> +	memcpy(&req_info->pdn, pdn, sizeof(*pdn));

> +	xa_for_each_start(&dev->link_topo->phys, ctx->phy_index, pdn, ctx->phy_index) {
> +		ehdr = ethnl_dump_put(skb, cb, ETHTOOL_MSG_PHY_GET_REPLY);
> +		if (!ehdr) {
> +			ret = -EMSGSIZE;
> +			break;
> +		}
> +
> +		ret = ethnl_fill_reply_header(skb, dev, ETHTOOL_A_PHY_HEADER);
> +		if (ret < 0) {
> +			genlmsg_cancel(skb, ehdr);
> +			break;
> +		}
> +
> +		memcpy(&pri->pdn, pdn, sizeof(*pdn));

Why do you copy the pdn each time 🤔️

> +	return ret;
> +}
> +

double new line at the end

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