[PATCH 5/9] gpiolib: use gpio_chips list in gpiochip_find_base

[Alex Courbot]

On 02/06/2013 02:21 AM, Linus Walleij wrote:
> This looks like it is preserving this userspace-sensitive semantic
> so that dynamically added chips will still get the same assigned
> numbers.

It does (it should, at least), the assigned ranges should be strictly 
identical to the previous version. While testing I also made sure all 
chips had the same GPIO range.

> But I want some guarantees, so state clearly in the commit
> that any dynamically assigned chip will get the same base
> address after this change as it got before it, and please take
> this opportunity to add a comment stating that this search
> method is vital for userspace ABIs, and must be preserved.

Done. I will take the blame if something goes wrong. :)

Thanks,
Alex.