netdev - Re: [PATCH v4 net-next 04/10] net/ncsi: Ethtool operation to get NCSI topology

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Message-ID: <20170503222111.749ce90b@xeon-e3>
Date:   Wed, 3 May 2017 22:21:11 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Gavin Shan <gwshan@...ux.vnet.ibm.com>
Cc:     netdev@...r.kernel.org, joe@...ches.com, kubakici@...pl,
        f.fainelli@...il.com, davem@...emloft.net
Subject: Re: [PATCH v4 net-next 04/10] net/ncsi: Ethtool operation to get
 NCSI topology

On Wed,  3 May 2017 14:44:35 +1000
Gavin Shan <gwshan@...ux.vnet.ibm.com> wrote:

> +void ncsi_ethtool_register_dev(struct net_device *dev)
> +{
> +	struct ethtool_ops *ops;
> +
> +	ops = (struct ethtool_ops *)(dev->ethtool_ops);
> +	if (!ops)
> +		return;
> +
> +	ops->get_ncsi_channels = ncsi_get_channels;
> +}
> +

Instead of casting away const which opens up potential security
issues. Have two ethtool_ops structures.