linux-kernel - Re: [PATCH v2 1/1] regmap: Drop unused devm_regmap_*

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Message-ID: <Z4lHOJ68VRdJG3j_@smile.fi.intel.com>
Date: Thu, 16 Jan 2025 19:51:52 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mark Brown <broonie@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>
Subject: Re: [PATCH v2 1/1] regmap: Drop unused devm_regmap_*_free() APIs

On Thu, Jan 16, 2025 at 04:41:36PM +0000, Mark Brown wrote:
> On Thu, Jan 16, 2025 at 06:24:50PM +0200, Andy Shevchenko wrote:
> > On Thu, Jan 16, 2025 at 04:15:05PM +0000, Mark Brown wrote:
> 
> > > This just seems unhelpful, there's fairly obvious uses for something
> > > like this where we decide we can't actually use some things based on
> > > what we discover during probe.
> 
> > It's an effectively dead code. I rarely see people are using devm_*_free(), and
> > when it's so, it is most likely by misunderstanding of the concept. For what you
> > described I don't remember any _practical_ use case. Theoretically any dead code
> > is useful, but it's not the point, right?
> 
> The use case would be to read some ID registers in a subfeature then
> decide that it's not supported for some reason so we'll just ignore it
> at runtime.  Given that you're also complaining about there being no
> current users there doesn't seem to be much problem with misuse.

Yeah no users — no misuse :-)

-- 
With Best Regards,
Andy Shevchenko