Re: [PATCH v8 2/8] iio: dac: ad5686: missing NULL check on match data

[Andy Shevchenko]

On Fri, Jul 17, 2026 at 10:31:26AM +0100, Rodrigo Alencar wrote:
> On 17/07/26 11:15, Andy Shevchenko wrote:
> > On Fri, Jul 17, 2026 at 07:51:35AM +0100, Rodrigo Alencar wrote:
> > > On 16/07/26 21:42, Andy Shevchenko wrote:
> > > > On Thu, Jul 16, 2026 at 01:14:18PM +0100, Rodrigo Alencar via B4 Relay wrote:

...

> > > > >  	struct iio_dev *indio_dev;
> > > > >  	int ret, i;
> > > > 
> > > > Move an assignment here as well.
> > > > 
> > > > 	chip_info = ...
> > > 
> > > assignment? this is an input param validation
> > 
> > Can we make sure we always get a correct one to begin with?
> > With that an assignment and check can be coupled together.
> > Also consider use -ENODATA as it's most likely comes from
> > driver_data.
> 
> I suppose you are suggesting to move the check to the bus code with:
> 
> 	info = i2c_get_match_data(i2c);
> 	if (!info)
> 		return -ENODATA;
> 
> rather than here in the core/common code.

Yes! This avoids layering violation and makes the API contract cleaner.

> > > > > +	if (!chip_info)
> > > > > +		return -ENODEV;

-- 
With Best Regards,
Andy Shevchenko