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irqchip/mips-cpu: Set IPI domain parent chip
commit 599b306 upstream. Since commit 5556797 ("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: 3838a54 ("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>
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