From: Geert Uytterhoeven Date: Wed, 19 Nov 2025 13:19:11 +0000 (+0100) Subject: of/irq: Handle explicit interrupt parent X-Git-Url: https://gentwo.org/gitweb/?a=commitdiff_plain;h=6ba51b7b34caac6a64efdb5ec49d1c0e45e6197b;p=linux%2F.git of/irq: Handle explicit interrupt parent 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 Closes: https://lore.kernel.org/20251118115037.1866871-1-m.szyprowski@samsung.com Reported-by: Mark Brown Closes: https://lore.kernel.org/b037f67a-b241-4689-9914-57ff578c1454@sirena.org.uk Signed-off-by: Geert Uytterhoeven Tested-by: Marek Szyprowski Tested-by: Mark Brown Link: https://patch.msgid.link/e89669c9b3a4fbac4a972ffadcbe00fddb365472.1763557994.git.geert+renesas@glider.be Signed-off-by: Rob Herring (Arm) --- diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 96db232b666a..2271110b5f7c 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -595,6 +595,8 @@ void __init of_irq_init(const struct of_device_id *matches) desc->interrupt_parent = of_parse_phandle(np, "interrupts-extended", 0); if (!desc->interrupt_parent && of_property_present(np, "interrupts")) desc->interrupt_parent = of_irq_find_parent(np); + else if (!desc->interrupt_parent) + desc->interrupt_parent = of_parse_phandle(np, "interrupt-parent", 0); if (desc->interrupt_parent == np) { of_node_put(desc->interrupt_parent); desc->interrupt_parent = NULL;