Re: [PATCH v10 03/14] iio: inkern: make a best effort on offset calculation

[Liam Beguin]

Hi Andy,

On Tue, Dec 21, 2021 at 07:42:31AM +0200, Andy Shevchenko wrote:
> On Mon, Dec 20, 2021 at 11:17 AM Liam Beguin <liambeguin@xxxxxxxxx> wrote:
> >
> > From: Liam Beguin <lvb@xxxxxxxxxx>
> >
> > iio_convert_raw_to_processed_unlocked() assumes the offset is an
> > integer. Make a best effort to get a valid offset value for fractional
> > cases without breaking implicit truncations.
> 
> ...
> 
> > +                       offset_val /= (1 << offset_val2);
> 
> Besides potentially being problematic (if arg is 31 for the left
> shift) why not simply
> 
> _val >>= _val2;

That is safer, and more elegant! I'll update.

Thanks,
Liam

> --
> With Best Regards,
> Andy Shevchenko