[PATCH] of/irq: Handle explicit interrupt parent

[Rob Herring (Arm)]

On Wed, 19 Nov 2025 14:19:11 +0100, Geert Uytterhoeven wrote:
> If an interrupt controller is used as a proxy, it may have an
> "interrupt-parent" property, but lack "interrupts" and
> "interrupts-extended" properties.  In that case, the "interrupt-parent"
> property in the interrupt controller node is ignored, causing the
> interrupt controller to fail to probe, and leading to system boot
> failures or crashes.
> 
> Fix this by also considering an explicit "interrupt-parent" property in
> the interrupt controller node itself.
> 
> Fixes: 1b1f04d8271e7ba7 ("of/irq: Ignore interrupt parent for nodes without interrupts")
> Reported-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Closes: https://lore.kernel.org/20251118115037.1866871-1-m.szyprowski@samsung.com
> Reported-by: Mark Brown <broonie at kernel.org>
> Closes: https://lore.kernel.org/b037f67a-b241-4689-9914-57ff578c1454@sirena.org.uk
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
>  drivers/of/irq.c | 2 ++
>  1 file changed, 2 insertions(+)
> 

Applied, thanks!