netdev - Re: [PATCH V2 net-next 4/7] net: hns3: fix port setting handle for fibre port

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Message-ID: <7f914173-a2fc-08d8-e2b1-48fa3da4e29c@cogentembedded.com>
Date:   Wed, 11 Sep 2019 13:16:52 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Huazhong Tan <tanhuazhong@...wei.com>, davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        salil.mehta@...wei.com, yisen.zhuang@...wei.com,
        linuxarm@...wei.com, jakub.kicinski@...ronome.com
Subject: Re: [PATCH V2 net-next 4/7] net: hns3: fix port setting handle for
 fibre port

Hello!

On 11.09.2019 5:40, Huazhong Tan wrote:

> From: Guangbin Huang <huangguangbin2@...wei.com>
> 
> For hardware doesn't support use specified speed and duplex

    Can't pasre that. "For hardware that does not support using", perhaps?

> to negotiate, it's unnecessary to check and modify the port
> speed and duplex for fibre port when autoneg is on.
> 
> Fixes: 22f48e24a23d ("net: hns3: add autoneg and change speed support for fibre port")
> Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
> Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
> ---
>   drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 15 +++++++++++++++
>   1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> index f5a681d..680c350 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> @@ -726,6 +726,12 @@ static int hns3_check_ksettings_param(const struct net_device *netdev,
>   	u8 duplex;
>   	int ret;
>   
> +	/* hw doesn't support use specified speed and duplex to negotiate,

    I can't parse that, did you mean "using"?

> +	 * unnecessary to check them when autoneg on.
> +	 */
> +	if (cmd->base.autoneg)
> +		return 0;
> +
>   	if (ops->get_ksettings_an_result) {
>   		ops->get_ksettings_an_result(handle, &autoneg, &speed, &duplex);
>   		if (cmd->base.autoneg == autoneg && cmd->base.speed == speed &&
> @@ -787,6 +793,15 @@ static int hns3_set_link_ksettings(struct net_device *netdev,
>   			return ret;
>   	}
>   
> +	/* hw doesn't support use specified speed and duplex to negotiate,

    Here too...

> +	 * ignore them when autoneg on.
> +	 */
> +	if (cmd->base.autoneg) {
> +		netdev_info(netdev,
> +			    "autoneg is on, ignore the speed and duplex\n");
> +		return 0;
> +	}
> +
>   	if (ops->cfg_mac_speed_dup_h)
>   		ret = ops->cfg_mac_speed_dup_h(handle, cmd->base.speed,
>   					       cmd->base.duplex);

MBR, Sergei