Re: [PATCH v2 1/2] gpio: em: remove the gpiochip before removing the irq domain

[Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>]

CC Niklas, who has the hardware

On Thu, Jul 11, 2019 at 10:29 AM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>
> In commit 8764c4ca5049 ("gpio: em: use the managed version of
> gpiochip_add_data()") we implicitly altered the ordering of resource
> freeing: since gpiochip_remove() calls gpiochip_irqchip_remove()
> internally, we now can potentially use the irq_domain after it was
> destroyed in the remove() callback (as devm resources are freed after
> remove() has returned).
>
> Use devm_add_action_or_reset() to keep the ordering right and entirely
> kill the remove() callback in the driver.
>
> Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Fixes: 8764c4ca5049 ("gpio: em: use the managed version of gpiochip_add_data()")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>

Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

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