netdev - Re: [PATCH v4 net-next 3/5] net: dsa: Link aggregation support

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Message-ID: <20201216180248.u3uhrec2ssveubyp@skbuf>
Date:   Wed, 16 Dec 2020 20:02:48 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Tobias Waldekranz <tobias@...dekranz.com>
Cc:     davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
        vivien.didelot@...il.com, f.fainelli@...il.com,
        j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
        netdev@...r.kernel.org
Subject: Re: [PATCH v4 net-next 3/5] net: dsa: Link aggregation support

On Wed, Dec 16, 2020 at 05:00:54PM +0100, Tobias Waldekranz wrote:
> +	/* Drivers that benefit from having an ID associated with each
> +	 * offloaded LAG should set this to the maximum number of
> +	 * supported IDs. DSA will then maintain a mapping of _at
> +	 * least_ these many IDs, accessible to drivers via
> +	 * dsa_tree_lag_id().
           ~~~~~~~~~~~~~~~
           you named it dsa_lag_id() in the end.

> +	 */
> +	unsigned int		num_lag_ids;
[...]
> +	/* No IDs left, which is OK. Some drivers do not need it. The
> +	 * ones that do, e.g. mv88e6xxx, will discover that
> +	 * dsa_tree_lag_id returns an error for this device when
           ~~~~~~~~~~~~~~~
           same thing here.

> +	 * joining the LAG. The driver can then return -EOPNOTSUPP
> +	 * back to DSA, which will fall back to a software LAG.
> +	 */