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irqchip/irq-sifive-plic: Check and continue in case of an invalid cpuid. 

riscv_hartid_to_cpuid can return invalid cpuid for a hart that is
present in DT but was never brought up.

Print the appropriate warning message and continue.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Atish Patra 2019-02-12 03:10:11 -08:00 committed by Marc Zyngier
parent 518bfe84ec
commit fc03acaeab
1 changed files with 5 additions and 0 deletions
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5
drivers/irqchip/irq-sifive-plic.c
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@ -237,6 +237,11 @@ static int __init plic_init(struct device_node *node,
}
cpu = riscv_hartid_to_cpuid(hartid);
if (cpu < 0) {
pr_warn("Invalid cpuid for context %d\n", i);
continue;
}
handler = per_cpu_ptr(&plic_handlers, cpu);
handler->present = true;
handler->ctxid = i;