Re: [PATCH 1/4] of/device: Add a way to probe drivers by match data

[Geert Uytterhoeven]

Hi Matthias,

On Fri, Nov 9, 2018 at 11:29 AM Matthias Brugger <matthias.bgg@xxxxxxxxx> wrote:
> On 08/11/2018 18:58, Stephen Boyd wrote:
> > Quoting Matthias Brugger (2018-11-08 00:29:46)
> >> On 06/11/2018 19:36, Stephen Boyd wrote:
> >>> +int platform_driver_probe_by_of_match_data(struct platform_device *pdev)
> >>> +{
> >>> +     int (*probe_func)(struct platform_device *pdev);
> >>> +
> >>> +     probe_func = of_device_get_match_data(&pdev->dev);
> >>
> >> Shouldn't we check if probe_func is not NULL?
> >
> > Is the oops from the NULL pointer deref insufficient?
>
> Do you think we should crash the machine if someone uses the call wrongly? Or
> should we provide the possibility to error out on the caller side?

I believe that would be a bug in the driver, to be discovered ASAP.
So yes, please do crash ;-)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds