Re: [PATCH v2 7/8] RISC-V: Check and continue in case of an invalid cpuid.

Anup Patel
2019-01-08T11:59:58Z

Prefer, commit prefix "irqchip/irq-sifive-plic:" instead of "RISC-V:"

On Tue, Jan 8, 2019 at 3:08 PM Atish Patra <atish.patra@wdc.com> wrote:
>
> 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>
> ---
> drivers/irqchip/irq-sifive-plic.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
> index 357e9daf..254ecd76 100644
> --- a/drivers/irqchip/irq-sifive-plic.c
> +++ b/drivers/irqchip/irq-sifive-plic.c
> @@ -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;
> --
> 2.7.4
>

Otherwise, looks good to me.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup