Re: [PATCH] ALSA: hda: fix SND_INTEL_DSP_CONFIG dependency

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On Mon, Jan 4, 2021 at 4:00 PM Jaroslav Kysela <perex@xxxxxxxx> wrote:
> Dne 03. 01. 21 v 14:52 Arnd Bergmann napsal(a):

> > diff --git a/include/sound/intel-dsp-config.h b/include/sound/intel-dsp-config.h
> > index d4609077c258..94667e870029 100644
> > --- a/include/sound/intel-dsp-config.h
> > +++ b/include/sound/intel-dsp-config.h
> > @@ -18,24 +18,7 @@ enum {
> >       SND_INTEL_DSP_DRIVER_LAST = SND_INTEL_DSP_DRIVER_SOF
> >  };
> >
> > -#if IS_ENABLED(CONFIG_SND_INTEL_DSP_CONFIG)
>
> The SOF drivers selects the DSP config code only when required (for specific
> platforms - see sound/soc/sof/intel/Kconfig).
>
> It seems that the above if should be modified as:
>
> #if IS_BUILDIN(CONFIG_SND_INTEL_DSP_CONFIG) || (defined(MODULE) &&
> IS_MODULE(CONFIG_SND_INTEL_DSP_CONFIG))
>
> So the buildin drivers which do not require the DSP config probe can be
> compiled without this dependency.

This would be the same as

#if IS_REACHABLE(CONFIG_SND_INTEL_DSP_CONFIG)

but using that macro is almost always a bad idea, as it tends to hide
dependency problems and causes things to silently not work right
when the Kconfig rules are incorrect.

      Arnd



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