[PATCH net-next v17 09/14] net: ethtool: plca: Target the command to the requested PHY

[Christophe Leroy]

Le 09/07/2024 à 08:30, Maxime Chevallier a écrit :
> PLCA is a PHY-specific command. Instead of targeting the command
> towards dev->phydev, use the request to pick the targeted PHY.
> 
> Signed-off-by: Maxime Chevallier <maxime.chevallier at bootlin.com>

Reviewed-by: Christophe Leroy <christophe.leroy at csgroup.eu>
Tested-by: Christophe Leroy <christophe.leroy at csgroup.eu>

> ---
>   net/ethtool/plca.c | 30 ++++++++++++++++++++----------
>   1 file changed, 20 insertions(+), 10 deletions(-)
> 
> diff --git a/net/ethtool/plca.c b/net/ethtool/plca.c
> index b1e2e3b5027f..d95d92f173a6 100644
> --- a/net/ethtool/plca.c
> +++ b/net/ethtool/plca.c
> @@ -25,7 +25,7 @@ struct plca_reply_data {
>   
>   const struct nla_policy ethnl_plca_get_cfg_policy[] = {
>   	[ETHTOOL_A_PLCA_HEADER]		=
> -		NLA_POLICY_NESTED(ethnl_header_policy),
> +		NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   };
>   
>   static void plca_update_sint(int *dst, struct nlattr **tb, u32 attrid,
> @@ -58,10 +58,14 @@ static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
>   	struct plca_reply_data *data = PLCA_REPDATA(reply_base);
>   	struct net_device *dev = reply_base->dev;
>   	const struct ethtool_phy_ops *ops;
> +	struct nlattr **tb = info->attrs;
> +	struct phy_device *phydev;
>   	int ret;
>   
> +	phydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_PLCA_HEADER],
> +				      info->extack);
>   	// check that the PHY device is available and connected
> -	if (!dev->phydev) {
> +	if (IS_ERR_OR_NULL(phydev)) {
>   		ret = -EOPNOTSUPP;
>   		goto out;
>   	}
> @@ -80,7 +84,7 @@ static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
>   	memset(&data->plca_cfg, 0xff,
>   	       sizeof_field(struct plca_reply_data, plca_cfg));
>   
> -	ret = ops->get_plca_cfg(dev->phydev, &data->plca_cfg);
> +	ret = ops->get_plca_cfg(phydev, &data->plca_cfg);
>   	ethnl_ops_complete(dev);
>   
>   out:
> @@ -129,7 +133,7 @@ static int plca_get_cfg_fill_reply(struct sk_buff *skb,
>   
>   const struct nla_policy ethnl_plca_set_cfg_policy[] = {
>   	[ETHTOOL_A_PLCA_HEADER]		=
> -		NLA_POLICY_NESTED(ethnl_header_policy),
> +		NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   	[ETHTOOL_A_PLCA_ENABLED]	= NLA_POLICY_MAX(NLA_U8, 1),
>   	[ETHTOOL_A_PLCA_NODE_ID]	= NLA_POLICY_MAX(NLA_U32, 255),
>   	[ETHTOOL_A_PLCA_NODE_CNT]	= NLA_POLICY_RANGE(NLA_U32, 1, 255),
> @@ -141,15 +145,17 @@ const struct nla_policy ethnl_plca_set_cfg_policy[] = {
>   static int
>   ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info)
>   {
> -	struct net_device *dev = req_info->dev;
>   	const struct ethtool_phy_ops *ops;
>   	struct nlattr **tb = info->attrs;
>   	struct phy_plca_cfg plca_cfg;
> +	struct phy_device *phydev;
>   	bool mod = false;
>   	int ret;
>   
> +	phydev = ethnl_req_get_phydev(req_info, tb[ETHTOOL_A_PLCA_HEADER],
> +				      info->extack);
>   	// check that the PHY device is available and connected
> -	if (!dev->phydev)
> +	if (IS_ERR_OR_NULL(phydev))
>   		return -EOPNOTSUPP;
>   
>   	ops = ethtool_phy_ops;
> @@ -168,7 +174,7 @@ ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info)
>   	if (!mod)
>   		return 0;
>   
> -	ret = ops->set_plca_cfg(dev->phydev, &plca_cfg, info->extack);
> +	ret = ops->set_plca_cfg(phydev, &plca_cfg, info->extack);
>   	return ret < 0 ? ret : 1;
>   }
>   
> @@ -191,7 +197,7 @@ const struct ethnl_request_ops ethnl_plca_cfg_request_ops = {
>   
>   const struct nla_policy ethnl_plca_get_status_policy[] = {
>   	[ETHTOOL_A_PLCA_HEADER]		=
> -		NLA_POLICY_NESTED(ethnl_header_policy),
> +		NLA_POLICY_NESTED(ethnl_header_policy_phy),
>   };
>   
>   static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
> @@ -201,10 +207,14 @@ static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
>   	struct plca_reply_data *data = PLCA_REPDATA(reply_base);
>   	struct net_device *dev = reply_base->dev;
>   	const struct ethtool_phy_ops *ops;
> +	struct nlattr **tb = info->attrs;
> +	struct phy_device *phydev;
>   	int ret;
>   
> +	phydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_PLCA_HEADER],
> +				      info->extack);
>   	// check that the PHY device is available and connected
> -	if (!dev->phydev) {
> +	if (IS_ERR_OR_NULL(phydev)) {
>   		ret = -EOPNOTSUPP;
>   		goto out;
>   	}
> @@ -223,7 +233,7 @@ static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
>   	memset(&data->plca_st, 0xff,
>   	       sizeof_field(struct plca_reply_data, plca_st));
>   
> -	ret = ops->get_plca_status(dev->phydev, &data->plca_st);
> +	ret = ops->get_plca_status(phydev, &data->plca_st);
>   	ethnl_ops_complete(dev);
>   out:
>   	return ret;