netdev - Re: [RFC PATCH net-next 3/3] net/mlx5e: Expose link down reason to ethtool

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Message-ID: <20170621140318.GD27585@lunn.ch>
Date:   Wed, 21 Jun 2017 16:03:18 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Gal Pressman <galp@...lanox.com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        "John W. Linville" <linville@...driver.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Vidya Sagar Ravipati <vidya@...ulusnetworks.com>,
        Jiri Pirko <jiri@...lanox.com>,
        David Decotigny <decot@...glers.com>, kernel-team@...com
Subject: Re: [RFC PATCH net-next 3/3] net/mlx5e: Expose link down reason to
 ethtool

> +static int mlx5e_get_link_down_reason(struct net_device *netdev,
> +				      struct ethtool_link_down_reason *ldr)
> +{
> +	struct mlx5e_priv *priv = netdev_priv(netdev);
> +	u16 monitor_opcode;
> +	int err;
> +
> +	if (!netif_running(netdev)) {
> +		ldr->reason = ETHTOOL_LINK_NETDEV_CARRIER_DOWN;
> +		return 0;
> +	}

This is generic, will work for any interface. The same is true for
ADMIN_DOWN. Either it is not required at all, since the information is
available via other means, or it should be in the core.

	  Andrew