Re: [PATCH v1 1/1] gpiolib: Deduplicate cleanup for-loop in gpiochip_add_data_with_key()

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Thu, Feb 22, 2024 at 10:48:00AM +0100, Bartosz Golaszewski wrote:
> On Wed, Feb 21, 2024 at 8:36 PM Andy Shevchenko
> <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> >
> > There is no need to repeat for-loop twice in the error path in
> > gpiochip_add_data_with_key(). Deduplicate it. While at it,
> > rename loop variable to be more specific and avoid ambguity.
> >
> > It also properly unwinds the SRCU, i.e. in reversed order of allocating.

...

> This doesn't apply on top of gpio/for-next, I think it depends on one
> of your earlier patches?

Yes, on the fix with error path.

...

> > +       while (desc_index--)
> 
> What about gdev->descs[0]?

What about it? :-)

for (i = i - 1; i >= 0; i--)
while (--i >= 0)
while (i--)

are all equivalents.

The difference is what the value will i get _after_ the loop.

-- 
With Best Regards,
Andy Shevchenko