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Date:   Sat, 26 Sep 2020 19:28:26 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...dia.com>,
        Chris Healy <cphealy@...il.com>
Subject: Re: [PATCH net-next RFC v1 3/4] net: dsa: Add helper for converting
 devlink port to ds and port

On Sun, Sep 20, 2020 at 11:52:03PM +0000, Vladimir Oltean wrote:
> On Sat, Sep 19, 2020 at 04:43:31PM +0200, Andrew Lunn wrote:
> > Hide away from DSA drivers how devlink works.
> > 
> > Signed-off-by: Andrew Lunn <andrew@...n.ch>
> > ---
> >  include/net/dsa.h | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/include/net/dsa.h b/include/net/dsa.h
> > index 01da896b2998..a24d5158ee0c 100644
> > --- a/include/net/dsa.h
> > +++ b/include/net/dsa.h
> > @@ -685,6 +685,20 @@ static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
> >  	return dl_priv->ds;
> >  }
> >  
> > +static inline
> > +struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
> > +{
> > +	struct devlink *dl = port->devlink;
> > +	struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
> > +
> > +	return dl_priv->ds;
> > +}
> > +
> > +static inline int dsa_devlink_port_to_port(struct devlink_port *port)
> 
> How about dsa_devlink_port_to_index?
> It avoids the repetition and it also indicates more clearly that it
> returns an index rather than a struct dsa_port, without needing to fire
> up ctags.

Hi Vladimir

Just finishing off the next version of these patches, and i looped
back to check i addressed all the comments.

This one i tend to disagree with. If you look at DSA drivers, a port
variable is always an integer index. dp is used to refer to a
dsa_port.

If anything, i would suggest we rename dsa_to_port() to dsa_to_dp(),
and dsa_port_from_netdev to dsa_dp_from_netdev() or maybe
dsa_netdev_to_dp().

    Andrew

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