Re: [PATCH 3/4] iio: light: stk3310: log error if reading the chip id fails

[Jonathan Cameron <jic23@kernel.org>]

On Mon, 15 Apr 2024 18:05:54 +0300
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Sun, Apr 14, 2024 at 8:57 PM Aren Moynihan <aren@peacevolution.org> wrote:
> >
> > If the chip isn't powered, this call is likely to return an error.
> > Without a log here the driver will silently fail to probe. Common errors
> > are ENXIO (when the chip isn't powered) and ETIMEDOUT (when the i2c bus
> > isn't powered).  
> 
> >         ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);
> > -       if (ret < 0)
> > +       if (ret < 0) {
> > +               dev_err(&client->dev, "failed to read chip id: %d", ret);
> >                 return ret;
> > +       }  
> 
> Briefly looking at the code it seems that this one is strictly part of
> the probe phase, which means we may use
> 
>   return dev_err_probe(...);
> 
> pattern. Yet, you may add another patch to clean up all of them:
> _probe(), _init(), _regmap_init() to use the same pattern everywhere.
> 

Yes, a precursor patch to use dev_err_probe() throughout the probe only
functions in this driver would be excellent.

Jonathan