Re: [PATCH] of/irq: Add a quirk for controllers with their own definition of interrupt-map

From: Sander Vanheule
Date: Tue Nov 23 2021 - 03:40:36 EST

Hi Marc,

On Mon, 2021-11-22 at 10:30 +0000, Marc Zyngier wrote:
> Since 041284181226 ("of/irq: Allow matching of an interrupt-map local
> to an interrupt controller"), a handful of interrupt controllers have
> stopped working correctly. This is due to the DT exposing a non-sensical
> interrupt-map property, and their drivers relying on the kernel ignoring
> this property.
> Since we cannot realistically fix this terrible behaviour, add a quirk
> for the limited set of devices that have implemented this monster,
> and document that this is a pretty bad practice.
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Cc: John Crispin <john@xxxxxxxxxxx>
> Cc: Biwen Li <>
> Cc: Chris Brandt <chris.brandt@xxxxxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>

Thanks for the patch. As far as I can tell, this restores the old behaviour from
5.15 for "realtek,rtl-intc" and things work as expected.