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of/irq: Handle explicit interrupt parent

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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: 1b1f04d827 ("of/irq: Ignore interrupt parent for nodes without interrupts")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/20251118115037.1866871-1-m.szyprowski@samsung.com
Reported-by: Mark Brown <broonie@kernel.org>
Closes: https://lore.kernel.org/b037f67a-b241-4689-9914-57ff578c1454@sirena.org.uk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/e89669c9b3a4fbac4a972ffadcbe00fddb365472.1763557994.git.geert+renesas@glider.be
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Geert Uytterhoeven 2025-11-19 14:19:11 +01:00 • committed by Rob Herring (Arm)
parent d8c8a575f5
commit 6ba51b7b34
1 changed files with 2 additions and 0 deletions
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2
drivers/of/irq.c
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@ -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;