[alsa-devel] Null suspend/resume functions

[Mark Brown]

On Mon, Nov 09, 2009 at 01:31:36PM +0000, Mark Brown wrote:
> On Mon, Nov 09, 2009 at 10:58:58AM +0000, Mark Brown wrote:
> > On Mon, Nov 09, 2009 at 11:54:47AM +0900, Kuninori Morimoto wrote:

Any chance someone from the PM side could comment on the issue below?

> > > +static int fsi_runtime_nop(struct device *dev)
> > > +{
> > > +	/* Runtime PM callback shared between ->runtime_suspend()
> > > +	 * and ->runtime_resume(). Simply returns success.
> > > +	 *
> > > +	 * This driver re-initializes all registers after
> > > +	 * pm_runtime_get_sync() anyway so there is no need
> > > +	 * to save and restore registers here.
> > > +	 */
> > > +	return 0;
> > > +}
> > 
> > This sets off alarm bells but it's perfectly reasonable, especially with
> > platforms able to put things into a low power state with no explicit
> > driver code now they can do power domain style things like SH.  I've
> > CCed in the PM folks since this seems like a perfectly reasonable use
> > case which ought to be handled more nicely.