Re: [PATCH] iio: light: opt4060: fix inverted own trigger check

[Jonathan Cameron]

On Mon, 9 Nov 2026 15:52:31 +0000
Nuno Sá <nuno.sa@xxxxxxxxxx> wrote:

> On Mon, Nov 09, 2026 at 02:47:45AM +0000, Jonathan Cameron wrote:
> > From: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>
> > 
> > opt4060_set_driver_state() is meant to keep sampling and the interrupt
> > on every conversion enabled while the buffer is in use with the
> > driver's own trigger, as that interrupt is what fires the trigger.
> > 
> > When converted to use IIO_DEV_GUARD_CURRENT_MODE() the negation of
> > iio_trigger_validate_own_device(), which returns 0 for the device's own
> > trigger, was lost. As a result, with the driver's own trigger in use,
> > enabling or disabling a threshold event switches the interrupt to
> > thresholds only and buffered capture stops. With another trigger in
> > use, the one shot conversions requested by opt4060_trigger_new_samples()
> > are instead forced to continuous mode.
> > 
> > Restore the negation so the code matches the comment above it.
> > 
> > Fixes: 8284a4985416 ("iio: light: opt4060: Use IIO cleanup helpers")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>
> > ---
> > This was found by an LLM whilst doing a refactor of related code.
> > Indeed seems there was a change of behavior in the sited patch that
> > wasn't as intended.
> > ---  
> 
> Reviewed-by: Nuno Sá <nuno.sa@xxxxxxxxxx>

Fixed the linux-iio address.  I'll probably post a v2 so I can pick these up
as normal though. 

Thanks for the review Nuno,

J

> 
> >  drivers/iio/light/opt4060.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/light/opt4060.c b/drivers/iio/light/opt4060.c
> > index 8253a6a8bee4..1a7d429453be 100644
> > --- a/drivers/iio/light/opt4060.c
> > +++ b/drivers/iio/light/opt4060.c
> > @@ -310,7 +310,7 @@ static int opt4060_set_driver_state(struct iio_dev *indio_dev,
> >  	 * IRQ and sampling must go to or remain continuous.
> >  	 */
> >  	if (iio_buffer_enabled(indio_dev) &&
> > -	    iio_trigger_validate_own_device(indio_dev->trig, indio_dev))
> > +	    !iio_trigger_validate_own_device(indio_dev->trig, indio_dev))
> >  		return opt4060_set_state_common(chip, true, true);
> >  
> >  	/*
> > -- 
> > 2.56.0
> >