From: Mathias Kresin <d...@kresin.me>
commit 599b3063adf4bf041a87a69244ee36aded0d878f upstream.
Since commit 55567976629e ("genirq/irqdomain: Allow partial trimming of
irq_data hierarchy") the irq_data chain is valided.
The irq_domain_trim_hierarchy() function doesn't consider the irq + ipi
domain hierarchy as valid, since the ipi domain has the irq domain set
as parent, but the parent domain has no chip set. Hence the boot ends in
a kernel panic.
Set the chip for the parent domain as it is done in the mips gic irq
driver, to have a valid irq_data chain.
Fixes: 3838a547fda2 ("irqchip: mips-cpu: Introduce IPI IRQ domain support")
Cc: <sta...@vger.kernel.org> # v5.10+
Signed-off-by: Mathias Kresin <d...@kresin.me>
Signed-off-by: Marc Zyngier <m...@kernel.org>
Link: https://lore.kernel.org/r/20210107213603.1637781-1-...@kresin.me
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/irqchip/irq-mips-cpu.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/irqchip/irq-mips-cpu.c
+++ b/drivers/irqchip/irq-mips-cpu.c
@@ -197,6 +197,13 @@ static int mips_cpu_ipi_alloc(struct irq
if (ret)
return ret;
+ ret = irq_domain_set_hwirq_and_chip(domain->parent, virq + i,
hwirq,
+ &mips_mt_cpu_irq_controller,
+ NULL);
+
+ if (ret)
+ return ret;
+
ret = irq_set_irq_type(virq + i, IRQ_TYPE_LEVEL_HIGH);
if (ret)
return ret;
