Re: [PATCH] iio: humidity: hts221: fix division by zero in calibration data parsing

[Jonathan Cameron]

On Mon, 31 Aug 2026 10:05:06 +0300
Andy Shevchenko <andriy.shevchenko@xxxxxxxxx> wrote:

> On Mon, Aug 31, 2026 at 01:00:21AM +0100, Jonathan Cameron wrote:
> > On Wed, 26 Aug 2026 17:09:49 +0300
> > Andy Shevchenko <andriy.shevchenko@xxxxxxxxx> wrote:  
> > > On Tue, Aug 25, 2026 at 05:21:10PM +0800, Yang Zi wrote:  
> 
> ...
> 
> > > Do you have HW to test? Any fault injection perhaps?
> > > The problem with div-by-0 is that it's implementation defined, meaning
> > > that it's how compiler decides. Now, the question is, what will compiler
> > > do in the current code (no patch applied)?
> > >   
> > Whilst all this is true, the code shouldn't be relying on any particular
> > behavior.  So do we need to know?  
> 
> That's my point. If code relies on that, it should be spelled clearly in
> the commit message. Then we will deliberately break that (nasty and wrong)
> behaviour.
> 

Ah. Got you. So a statement that the condition (probably) never occurs in practice
should do the job here by side stepping that question.

> > Reality is the hardware is almost certainly never returning values where this
> > is true.  
>