From: Mathias Kresin dev@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: stable@vger.kernel.org # v5.10+ Signed-off-by: Mathias Kresin dev@kresin.me Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20210107213603.1637781-1-dev@kresin.me Signed-off-by: Greg Kroah-Hartman gregkh@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;