Re: [PATCH] thermal: sun8i: Be loud when probe fails

[Robin Murphy]

On 2020-07-08 14:21, OndÅej Jirman wrote:
[...]
> > > @@ -523,10 +547,17 @@ static int sun8i_ths_probe(struct platform_device *pdev)
> > >          ret = devm_request_threaded_irq(dev, irq, NULL,
> > >                                          sun8i_irq_thread,
> > >                                          IRQF_ONESHOT, "ths", tmdev);
> > > -       if (ret)
> > > -               return ret;
> > > +       if (ret) {
> > > +               dev_err(dev, "Failed to request irq (%d)\n", ret);
> > > +               goto err_out;
> > > +       }
> > >
> > > +       dev_info(dev, "Thermal sensor ready!\n");
> > >          return 0;
> > > +
> > > +err_out:
> > > +       dev_err(dev, "Failed to probe thermal sensor (%d)\n", ret);
> >
> > When the driver fails, there will be this print. Isn't it superfluous
> > for you to add theseï
> >
> > sun8i-thermal: probe of 5070400.thermal-sensor failed with error
>
> There's no such failure message in the case I investigated, which is
> EPROBE_DEFER failure waiting for nvmem driver that never loads,
> because it's not configured by the user to build.

Ah, in that case this was a bit misleading, since "probe failure" isn't 
really the problem at all. As it happens, there's a whole other 
discussion ongoing around making probe deferral issues easier to debug:

https://lore.kernel.org/linux-arm-kernel/20200626100103.18879-1-a.hajda@xxxxxxxxxxx/

Robin.