Restore the set_config operation, as it was lost during the refactoring of
the gpio-aggregator driver while creating the gpio forwarder library.

Fixes: b31c68fd851e7 ("gpio: aggregator: handle runtime registration of gpio_desc in gpiochip_fwd")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202509281206.a7334ae8-lkp@intel.com
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
---
 drivers/gpio/gpio-aggregator.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index 37600faf4a4b728ceb1937538b3f6b78ab3e90fa..416f265d09d070ee33e30bf6773e9d8fffc242bd 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -723,6 +723,7 @@ struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
 	chip->get_multiple = gpio_fwd_get_multiple_locked;
 	chip->set = gpio_fwd_set;
 	chip->set_multiple = gpio_fwd_set_multiple_locked;
+	chip->set_config = gpio_fwd_set_config;
 	chip->to_irq = gpio_fwd_to_irq;
 	chip->base = -1;
 	chip->ngpio = ngpios;

---
base-commit: bc061143637532c08d9fc657eec93fdc2588068e
change-id: 20250929-gpio-aggregator-fix-set-config-callback-6d2bff306023

Best regards,
-- 
Thomas Richard <thomas.richard@bootlin.com>

On Mon, Sep 29, 2025 at 12:03 PM Thomas Richard
<thomas.richard@bootlin.com> wrote:
>
> Restore the set_config operation, as it was lost during the refactoring of
> the gpio-aggregator driver while creating the gpio forwarder library.
>
> Fixes: b31c68fd851e7 ("gpio: aggregator: handle runtime registration of gpio_desc in gpiochip_fwd")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202509281206.a7334ae8-lkp@intel.com
> Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
> ---
>  drivers/gpio/gpio-aggregator.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
> index 37600faf4a4b728ceb1937538b3f6b78ab3e90fa..416f265d09d070ee33e30bf6773e9d8fffc242bd 100644
> --- a/drivers/gpio/gpio-aggregator.c
> +++ b/drivers/gpio/gpio-aggregator.c
> @@ -723,6 +723,7 @@ struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
>         chip->get_multiple = gpio_fwd_get_multiple_locked;
>         chip->set = gpio_fwd_set;
>         chip->set_multiple = gpio_fwd_set_multiple_locked;
> +       chip->set_config = gpio_fwd_set_config;
>         chip->to_irq = gpio_fwd_to_irq;
>         chip->base = -1;
>         chip->ngpio = ngpios;
>
> ---

Thanks for fixing it. I saw the report but I had already prepared my
big PR for Linus. This will still make v6.18-rc1, I will send it later
into the merge window. Please address Geert's review.

Bartosz

Hi Thomas,

On Mon, 29 Sept 2025 at 12:03, Thomas Richard
<thomas.richard@bootlin.com> wrote:
> Restore the set_config operation, as it was lost during the refactoring of
> the gpio-aggregator driver while creating the gpio forwarder library.
>
> Fixes: b31c68fd851e7 ("gpio: aggregator: handle runtime registration of gpio_desc in gpiochip_fwd")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Closes: https://lore.kernel.org/oe-lkp/202509281206.a7334ae8-lkp@intel.com
> Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>

Thanks for your patch!

> --- a/drivers/gpio/gpio-aggregator.c
> +++ b/drivers/gpio/gpio-aggregator.c
> @@ -723,6 +723,7 @@ struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
>         chip->get_multiple = gpio_fwd_get_multiple_locked;
>         chip->set = gpio_fwd_set;
>         chip->set_multiple = gpio_fwd_set_multiple_locked;
> +       chip->set_config = gpio_fwd_set_config;
>         chip->to_irq = gpio_fwd_to_irq;
>         chip->base = -1;
>         chip->ngpio = ngpios;
>

Is there any specific reason why you are doing this unconditionally,
instead of only when any of its parents support .set_config(), like
was done before?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds