[alsa-devel] [PATCH] ASoC: omap-mcbsp: Do not attempt to change DAI sysclk if stream is active

[Mark Brown]

On Fri, Jun 10, 2011 at 02:56:10PM +0300, Jarkko Nikula wrote:

> I was thinking to return -EBUSY here but went thinking is it really
> worth of trouble? Machine drivers are calling this from their hw_params
> callback  with the same configuration always (I suppose) for both
> playback and capture and it sounded kind of overkill to check what is
> existing configuration or skip the -EBUSY error.

One fairly common case is selecting the system clock rate to a fixed
multiple of the sample rate so applications that try to set up different
playback and record rates trigger issues.