linux-kernel - Re: [PATCH net-next v17 10/14] net: ethtool: pse-pd: Target the command to the requested PHY

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Message-ID: <096c1dfe-999d-4f37-ada4-1adbf56afaf7@csgroup.eu>
Date: Wed, 14 Aug 2024 16:31:49 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>, davem@...emloft.net
Cc: 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, 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>
Subject: Re: [PATCH net-next v17 10/14] net: ethtool: pse-pd: Target the
 command to the requested PHY



Le 09/07/2024 à 08:30, Maxime Chevallier a écrit :
> PSE and PD configuration is a PHY-specific command. Instead of targeting
> the command towards dev->phydev, use the request to pick the targeted
> PHY device.
> 
> As we don't get the PHY directly from the netdev's attached phydev, also
> adjust the error messages.
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
Tested-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   net/ethtool/pse-pd.c | 31 +++++++++++++++++++------------
>   1 file changed, 19 insertions(+), 12 deletions(-)
> 
> diff --git a/net/ethtool/pse-pd.c b/net/ethtool/pse-pd.c
> index ba46c9c8b12d..0f37ff5de7f0 100644
> --- a/net/ethtool/pse-pd.c
> +++ b/net/ethtool/pse-pd.c
> @@ -28,17 +28,15 @@ struct pse_reply_data {
>   /* PSE_GET */
>   
>   const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1] = {
> -	[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
> +	[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   };
>   
> -static int pse_get_pse_attributes(struct net_device *dev,
> +static int pse_get_pse_attributes(struct phy_device *phydev,
>   				  struct netlink_ext_ack *extack,
>   				  struct pse_reply_data *data)
>   {
> -	struct phy_device *phydev = dev->phydev;
> -
>   	if (!phydev) {
> -		NL_SET_ERR_MSG(extack, "No PHY is attached");
> +		NL_SET_ERR_MSG(extack, "No PHY found");
>   		return -EOPNOTSUPP;
>   	}
>   
> @@ -58,13 +56,20 @@ static int pse_prepare_data(const struct ethnl_req_info *req_base,
>   {
>   	struct pse_reply_data *data = PSE_REPDATA(reply_base);
>   	struct net_device *dev = reply_base->dev;
> +	struct nlattr **tb = info->attrs;
> +	struct phy_device *phydev;
>   	int ret;
>   
>   	ret = ethnl_ops_begin(dev);
>   	if (ret < 0)
>   		return ret;
>   
> -	ret = pse_get_pse_attributes(dev, info->extack, data);
> +	phydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_PSE_HEADER],
> +				      info->extack);
> +	if (IS_ERR(phydev))
> +		return -ENODEV;
> +
> +	ret = pse_get_pse_attributes(phydev, info->extack, data);
>   
>   	ethnl_ops_complete(dev);
>   
> @@ -206,7 +211,7 @@ static void pse_cleanup_data(struct ethnl_reply_data *reply_base)
>   /* PSE_SET */
>   
>   const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1] = {
> -	[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
> +	[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   	[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL] =
>   		NLA_POLICY_RANGE(NLA_U32, ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED,
>   				 ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED),
> @@ -219,12 +224,12 @@ const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1] = {
>   static int
>   ethnl_set_pse_validate(struct ethnl_req_info *req_info, struct genl_info *info)
>   {
> -	struct net_device *dev = req_info->dev;
>   	struct nlattr **tb = info->attrs;
>   	struct phy_device *phydev;
>   
> -	phydev = dev->phydev;
> -	if (!phydev) {
> +	phydev = ethnl_req_get_phydev(req_info, tb[ETHTOOL_A_PSE_HEADER],
> +				      info->extack);
> +	if (IS_ERR_OR_NULL(phydev)) {
>   		NL_SET_ERR_MSG(info->extack, "No PHY is attached");
>   		return -EOPNOTSUPP;
>   	}
> @@ -255,12 +260,14 @@ ethnl_set_pse_validate(struct ethnl_req_info *req_info, struct genl_info *info)
>   static int
>   ethnl_set_pse(struct ethnl_req_info *req_info, struct genl_info *info)
>   {
> -	struct net_device *dev = req_info->dev;
>   	struct nlattr **tb = info->attrs;
>   	struct phy_device *phydev;
>   	int ret = 0;
>   
> -	phydev = dev->phydev;
> +	phydev = ethnl_req_get_phydev(req_info, tb[ETHTOOL_A_PSE_HEADER],
> +				      info->extack);
> +	if (IS_ERR_OR_NULL(phydev))
> +		return -ENODEV;
>   
>   	if (tb[ETHTOOL_A_C33_PSE_AVAIL_PW_LIMIT]) {
>   		unsigned int pw_limit;