[PATCH] powerpc: sysdev: simple_gpio: fix Oops in gpio save_regs function

[Linus Walleij]

On Wed, May 24, 2017 at 10:01 AM, Christophe Leroy
<christophe.leroy at c-s.fr> wrote:

> of_mm_gpiochip_add_data() generates an Oops for NULL pointer dereference.
>
> of_mm_gpiochip_add_data() calls mm_gc->save_regs() before
> setting the data, therefore ->save_regs() cannot use gpiochip_get_data()
>
> Fixes: 937daafca774b ("powerpc: simple-gpio: use gpiochip data pointer")
> Cc: stable at vger.kernel.org
>
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Reviewed-by: Linus Walleij <linus.walleij at linaro.org>

Sorry for any screwups I've caused...

Yours,
Linus Walleij