Re: [PATCH] gpiolib: Defer on non-DT find_chip_by_name() failure

[Andy Shevchenko]

On Tue, Jul 3, 2018 at 8:26 PM, Janusz Krzysztofik <jmkrzyszt@xxxxxxxxx> wrote:
> Avoid replication of error code conversion in non-DT GPIO consumers'
> code by returning -EPROBE_DEFER from gpiod_find() in case a chip
> identified by its label in a registered lookup table is not ready.
>
> See https://lkml.org/lkml/2018/5/30/176 for example case.

> +                       /*
> +                        * As the lookup table indicates a chip with
> +                        * p->chip_label should exist, assume it may
> +                        * still appear latar and let the interested

latar -> later

> +                        * consumer be probed again or let the Deferred
> +                        * Probe infrastructure handle the error.
> +                        */
> +                       dev_warn(dev, "cannot find GPIO chip %s, deferring\n",
> +                                p->chip_label);
> +                       return ERR_PTR(-EPROBE_DEFER);
>                 }

-- 
With Best Regards,
Andy Shevchenko