[PATCH] ASoC: meson: axg-tdm-formatter: Use guard() for mutex locks

[Bui Duc Phuc]

Hi Jerome,

Thank you for your feedback,

>
> I suppose it is OK but it does not seem to really clean anything and
> make the code easier to follow in that instance, from my perspective at
> least.
>
> If there is policy to systematically use guard() whenever
> possible then OK, otherwise it seems unnecessary.
>

I have noticed that guard() has been adopted in several subsystems.
Since this appears to be the only place in the Meson ASoC code currently using
mutex_lock()/mutex_unlock(), I converted it for consistency with the
newer style.

Going forward, should new Meson ASoC code use guard(), or should it continue
using the traditional mutex_lock()/mutex_unlock() pattern?

Best regards,
Phuc