[RFC PATCH 1/2] ASoC: soc-pcm: protect BE dailink state changes in trigger

[Mark Brown]

From: Mark Brown,,, <broonie at kernel.org>

On Tue, 17 Aug 2021 11:40:53 -0500, Pierre-Louis Bossart wrote:
> When more than one FE is connected to a BE, e.g. in a mixing use case,
> the BE can be triggered multiple times when the FE are opened/started
> concurrently. This race condition is problematic in the case of
> SoundWire BE dailinks, and this is not desirable in a general
> case. The code carefully checks when the BE can be stopped or
> hw_free'ed, but the trigger code does not use any mutual exclusion.
> 
> [...]

Applied, thanks!

[1/2] ASoC: soc-pcm: protect BE dailink state changes in trigger
      commit: 0c75fc7193387776c10f7c7b440d93496e3d5e21
[2/2] ASoC: soc-pcm: test refcount before triggering
      commit: 6479f7588651cbc9c91e61c20ff39119cbc8feba

Best regards,
-- 
Mark Brown,,, <broonie at kernel.org>