Re: [PATCH v2 01/12] iio: accel: Remove redundant pm_runtime_mark_last_busy() calls

[Jonathan Cameron <jic23@kernel.org>]

On Wed, 9 Jul 2025 11:46:30 +0300
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:

> On Wed, Jul 09, 2025 at 02:11:51AM +0300, Sakari Ailus wrote:
> > pm_runtime_put_autosuspend(), pm_runtime_put_sync_autosuspend(),
> > pm_runtime_autosuspend() and pm_request_autosuspend() now include a call
> > to pm_runtime_mark_last_busy(). Remove the now-reduntant explicit call to
> > pm_runtime_mark_last_busy().  
> 
> ...
> 
> > -	if (on) {
> > +	if (on)
> >  		ret = pm_runtime_resume_and_get(dev);
> > -	} else {
> > -		pm_runtime_mark_last_busy(dev);
> > +	else
> >  		ret = pm_runtime_put_autosuspend(dev);
> > -	}  
> 
> The following blank line can be removed as it's done in the other file.
> 
> ...
> 
> Side note: Looking at this, perhaps we can also have a helper to toggle state?
> 
> ...
> 
> >  	if (on)
> >  		ret = pm_runtime_resume_and_get(&data->client->dev);
> > -	else {
> > -		pm_runtime_mark_last_busy(&data->client->dev);
> > +	else
> >  		ret = pm_runtime_put_autosuspend(&data->client->dev);
> > -	}  
> 
> So, already two users of the potential new helper :-)

Maybe, but also worth a close look at whether, after this simplification
these little functions to set power state add anything over just
calling pm_runtime_resume_and_get() or *_put_autosuspend()
inline at the call sites.   There are some cases in these drivers
where the state is not hard coded at the call site though so
a helper might be useful for those.

I'm not thinking of it as a job for this patch though which shouldn't
be making significant changes even if they are enabled by
the removals of the calls to pm_runtime_mark_last_busy()

So good idea, but probably get this in first.


> 
> ...
> 
> > -	if (on) {
> > +	if (on)
> >  		ret = pm_runtime_resume_and_get(&client->dev);
> > -	} else {
> > -		pm_runtime_mark_last_busy(&client->dev);
> > +	else
> >  		ret = pm_runtime_put_autosuspend(&client->dev);
> > -	}
> >    
> 
> No blank line?
> 
> Three!
> 
> >  	if (ret < 0) {  
> 
> ...
> 
> >  	if (on)
> >  		ret = pm_runtime_resume_and_get(&client->dev);
> > -	else {
> > -		pm_runtime_mark_last_busy(&client->dev);
> > +	else
> >  		ret = pm_runtime_put_autosuspend(&client->dev);
> > -	}
> >  
> >  	if (ret < 0) {  
> 
> As per above and counting...
>