[alsa-devel] [PATCH] ASoC: rt5677: Avoid recursive locking in the DEADLOCK detector

[Mark Brown]

On Fri, Jun 05, 2015 at 08:53:54AM +0800, Nicolas Boichat wrote:

> > Could you be more specific about the deadlock you're seeing?  This isn't
> > really enough to understand either what the problem is or why this fixes
> > it.  Converting all the per-regmap mutexes into a single global mutex
> > isn't an immediately obvious step.

> We originally reported the issue to Realtek:

Any analysis needs to be in the changelog for the commit and...

> I suggested reworking the register read/write calls in rt5677.c to
> direct them to the correct regmap earlier on (rt5677->regmap or
> rt5677->regmap_physical), before locks are acquired. But the patch
> above also fixes the issue (that is, it removes the warning).

...the above sounds like there's a bug in the locking anyway which this
is just a bodge for?
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