netdev - Re: [PATCH v3 net-next 2/4] net: dsa: Link aggregation support

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Date:   Thu, 10 Dec 2020 00:03:31 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Tobias Waldekranz <tobias@...dekranz.com>
Cc:     davem@...emloft.net, kuba@...nel.org, vivien.didelot@...il.com,
        f.fainelli@...il.com, olteanv@...il.com, j.vosburgh@...il.com,
        vfalico@...il.com, andy@...yhouse.net, netdev@...r.kernel.org
Subject: Re: [PATCH v3 net-next 2/4] net: dsa: Link aggregation support

On Wed, Dec 09, 2020 at 04:21:31PM +0100, Tobias Waldekranz wrote:
> On Wed, Dec 09, 2020 at 15:27, Andrew Lunn <andrew@...n.ch> wrote:
> >> I disagree. A LAG is one type of netdev that a DSA port can offload. The
> >> other one is the DSA port's own netdev, i.e. what we have had since time
> >> immemorial.
> >> 
> >> dsa_port_offloads_netdev(dp, dev)?
> >
> > That is better.
> 
> ...but there is an even better one?

Not that comes to mind. 

> 
> > But a comment explaining what the function does might
> > be useful.
> 
> This is the function body:
> 
> 	/* Switchdev offloading can be configured on: */
> 
> 	if (dev == dp->slave)
> 		/* DSA ports directly connected to a bridge. */
> 		return true;
> 
> 	if (dp->lag && dev == dp->lag->dev)
> 		/* DSA ports connected to a bridge via a LAG */
> 		return true;
> 
> 	return false;
> 
> What more is there to explain?

OK, you are right. It is well commented as is. Just change the name
and we are good.

    Andrew