Commit f357b3a7 authored Dec 10, 2018 by Suzuki K Poulose Committed by Will Deacon Dec 10, 2018

arm64: smp: Handle errors reported by the firmware



The __cpu_up() routine ignores the errors reported by the firmware
for a CPU bringup operation and looks for the error status set by the
booting CPU. If the CPU never entered the kernel, we could end up
in assuming stale error status, which otherwise would have been
set/cleared appropriately by the booting CPU.

Reported-by: Steve Capper <steve.capper@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 66f16a24

arch/arm64/kernel/smp.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -141,6 +141,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
		}
		} else {
		pr_err("CPU%u: failed to boot: %d\n", cpu, ret);
		return ret;
		}

		secondary_data.task = NULL;

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