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

Atish Patra
2019-01-08T09:38:56Z

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