On Mon, Aug 6, 2018 at 11:54 AM Biju Das <biju.das@xxxxxxxxxxxxxx> wrote:
> Some platforms are not setting of_node in the driver. On these platforms
> defining gpio-reserved-ranges on device tree leads to kernel crash.
>
> It is due to some parts of the gpio core relying on the driver to set up
> of_node,while other parts do themselves.This inconsistent behaviour leads
> to a crash.
>
> gpiochip_add_data_with_key() calls gpiochip_init_valid_mask() with of_node
> as NULL. of_gpiochip_add() fills "of_node" and calls
> of_gpiochip_init_valid_mask().
>
> The fix is to move the assignment to chip->of_node from of_gpiochip_add()
> to gpiochip_add_data_with_key().
>
> Signed-off-by: Biju Das <biju.das@xxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Tested-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
