Re: [PATCH 23/24] ASoC: codecs: cs48l32: Use guard() for mutex locks

[Bui Duc Phuc]

On Fri, Jun 26, 2026 at 7:15 PM Charles Keepax
<ckeepax@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Fri, Jun 26, 2026 at 01:13:28PM +0700, phucduc.bui@xxxxxxxxx wrote:
> > From: bui duc phuc <phucduc.bui@xxxxxxxxx>
> >
> > Clean up the code using guard() for mutex locks.
> > Merely code refactoring, and no behavior change.
> >
> > Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
> > ---
> > -             snd_soc_component_update_bits(component, base + CS48L32_ASP_CONTROL1,
> > -                                           CS48L32_ASP_RATE_MASK, target_asp_rate);
> > -
> > -             if (change_rate_domain) {
> > -                     cs48l32_spin_sysclk(cs48l32_codec);
> > -                     mutex_unlock(&cs48l32_codec->rate_lock);
> > +                     scoped_guard(mutex, &cs48l32_codec->rate_lock) {
> > +                             cs48l32_spin_sysclk(cs48l32_codec);
> > +                             snd_soc_component_update_bits(component,
> > +                                                           base + CS48L32_ASP_CONTROL1,
> > +                                                           CS48L32_ASP_RATE_MASK,
> > +                                                           target_asp_rate);
> > +                             cs48l32_spin_sysclk(cs48l32_codec);
> > +                     }
> > +             } else {
> > +                     snd_soc_component_update_bits(component, base + CS48L32_ASP_CONTROL1,
> > +                                                   CS48L32_ASP_RATE_MASK, target_asp_rate);
>
> We can just drop this second write, update_bits won't do a
> write if the bits don't change and we know they won't from the
> read earlier. The original code was a bit odd, but might as well
> clean it up whilst we are shuffling this all around.
>

Hi Charles,

I understand.
I'll remove that else block in v2.

Best regards,
Phuc