[alsa-devel] [PATCH] ASoC: ti: davinci-mcasp: Protect hw_params callback against race

[Mark Brown]

On Mon, Aug 12, 2019 at 12:53:04PM +0300, Peter Ujfalusi wrote:
> If the playback and capture of the same McASP is connected to different
> dai link (non duplex PCM links, like with pcm3168a codec) then there is
> a high probability of race between the two direction leaving McASP in a
> confused state.
> 
> Protect the hw_params() with a mutex to make sure that this is not
> happening.

This feels like something we might want to consider moving up to the
core, though not every device is going to need it I guess it should be
safe to do there.
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