Re: [PATCH 5/5] iio: imu: icm20948: add runtime power management support

[Greg KH <gregkh@linuxfoundation.org>]

On Sun, Aug 31, 2025 at 09:23:08PM +0200, Markus Elfring wrote:
> …
> > @@ -24,17 +24,24 @@ static const struct iio_chan_spec
> >  static int inv_icm20948_temp_read_sensor(struct inv_icm20948_state *state,
> >  					 s16 *temp)
> >  {
> > -	guard(mutex)(&state->lock);
> > +	int ret;
> > +
> > +	pm_runtime_get_sync(state->dev);
> > +	mutex_lock(&state->lock);
> >  
> >  	__be16 raw;
> > -	int ret = regmap_bulk_read(state->regmap, INV_ICM20948_REG_TEMP_DATA,
> > +	ret = regmap_bulk_read(state->regmap, INV_ICM20948_REG_TEMP_DATA,
> >  				   &raw, sizeof(raw));
> >  	if (ret)
> > -		return ret;
> > +		goto out;
> >  
> >  	*temp = __be16_to_cpu(raw);
> > +	ret = 0;
> >  
> > -	return 0;
> > +out:
> > +	mutex_unlock(&state->lock);
> > +	pm_runtime_put_autosuspend(state->dev);
> > +	return ret;
> >  }
> …
> 
> Does anything hinder you with the continued application of scope-based resource management
> for such a function implementation?
> 
> Regards,
> Markus
> 



Hi,

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