linux-kernel - Re: [alsa-devel] [PATCH] ALSA: ac97c: Fix an error handling path in 'atmel_ac97c

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Message-ID: <20170831101903.avhj5tqywpvfsj4u@sirena.org.uk>
Date:   Thu, 31 Aug 2017 11:19:03 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>, perex@...ex.cz,
        tiwai@...e.com, arvind.yadav.cs@...il.com,
        nicolas.ferre@...rochip.com, garsilva@...eddedor.com,
        andriy.shevchenko@...ux.intel.com, bhumirks@...il.com,
        alsa-devel@...a-project.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] ALSA: ac97c: Fix an error handling path in
 'atmel_ac97c_probe()'

On Thu, Aug 31, 2017 at 10:10:21AM +0200, Alexandre Belloni wrote:

> And here is the fallout of the stupid, brainless "fixing" of issues
> reported by static analysis tools.

> This clk_prepare_enable will never fail. If it was going to fail, the
> platform would never boot to a point were it is able to execute that
> code. It is really annoying to have so much churn for absolutely 0
> benefit.

It may currently be the case that the SoCs you're looking at happen to
make this clock essential but that doesn't mean that it's not going to
be different in some future SoC, nor that we can't have a software bug
that this will detect.  Being consistent with our error checking also
means that we can spot places where it might practically be a problem
more easily, it's even easier if the error checking is there first time
but it's still worth it to go back later.

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