Subject: Re: [net-next v4 3/6] net: marvell: prestera: Add basic devlink support

From: Vadym Kochan <[email-masked]>
Date: Tue, 28 Jul 2020 15:30:06 +0300

Hi Andy,

On Mon, Jul 27, 2020 at 04:07:07PM +0300, Andy Shevchenko wrote:
> On Mon, Jul 27, 2020 at 3:23 PM Vadym Kochan <[email-masked]> wrote:
> >
> > Add very basic support for devlink interface:
> >
> >     - driver name
> >     - fw version
> >     - devlink ports
> 
> ...
> 
> > +static int prestera_dl_info_get(struct devlink *dl,
> > +                               struct devlink_info_req *req,
> > +                               struct netlink_ext_ack *extack)
> > +{
> > +       struct prestera_switch *sw = devlink_priv(dl);
> > +       char buf[16];
> 
> > +       int err = 0;
> 
> Redundant assignment. When you got a comment the rule of thumb is to
> check your entire contribution and address where it's applicable.
> 
> > +       err = devlink_info_driver_name_put(req, PRESTERA_DRV_NAME);
> > +       if (err)
> > +               return err;
> > +
> > +       snprintf(buf, sizeof(buf), "%d.%d.%d",
> > +                sw->dev->fw_rev.maj,
> > +                sw->dev->fw_rev.min,
> > +                sw->dev->fw_rev.sub);
> > +
> 
> > +       err = devlink_info_version_running_put(req,
> > +                                              DEVLINK_INFO_VERSION_GENERIC_FW,
> > +                                              buf);
> > +       if (err)
> > +               return err;
> > +
> > +       return 0;
> 
> return devlink_...
> 
> > +}
> 
> ...
> 
> > +       err = devlink_register(dl, sw->dev->dev);
> > +       if (err) {
> > +               dev_warn(sw->dev->dev, "devlink_register failed: %d\n", err);
> > +               return err;
> > +       }
> > +
> > +       return 0;
> 
>   if (err)
>     dev_warn(...);
> 
>   return err;
Would not it better to have 'return 0' at the end to visually indicate
the success point ?

> -- 
> With Best Regards,
> Andy Shevchenko

Thanks!