ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events
CPU hotplug happens during S2RAM and CPU notify event will be CPU_XXX_FROZEN. acpi_cpu_soft_notify() ignores to check these events. This also may make acpi_cpu_soft_notify() fall into sleep during CPU_DYING/STARTING_FROZEN events which don't allow callbacks to sleep. This patch is to fix it. Signed-off-by: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -120,6 +120,7 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb,
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unsigned int cpu = (unsigned long)hcpu;
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struct acpi_processor *pr = per_cpu(processors, cpu);
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struct acpi_device *device;
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action &= ~CPU_TASKS_FROZEN;
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/*
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* CPU_STARTING and CPU_DYING must not sleep. Return here since
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