Fix for Virtio GPIO Linux driver

The Virtio GPIO Linux driver reads the configuration space in a way not
conformant with the virtio specification. The hypervisor we are using is
strict in what it accepts so the current behavior causes a problem.

Builds on top of gpio/for-next, tested on Linux v6.5.7.

- Add CC: to stable as requested
- Add Fixes: in commit message as requested.
  (Problem is present from the beginning and was not introcuced later)
- Add Acked-by: from Viresh Kumar to the commit message
- No further changes to the patch itself

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>


On Thu, 24 Jul 2025 16:36:52 +0200, Harald Mommer wrote:
> Fix for Virtio GPIO Linux driver
> 
> The Virtio GPIO Linux driver reads the configuration space in a way not
> conformant with the virtio specification. The hypervisor we are using is
> strict in what it accepts so the current behavior causes a problem.
> 
> Builds on top of gpio/for-next, tested on Linux v6.5.7.
> 
> [...]

It's already Friday and I won't be able to run it through the autobuilders so
I won't be sending it for v6.16. I queued it for v6.17 and it will be part of
my PR early next week.

Thanks!

[1/1] gpio: virtio: Fix config space reading.
      https://git.kernel.org/brgl/linux/c/4740e1e2f320061c2f0dbadc0dd3dfb58df986d5

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>