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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>
hifive-unleashed-5.1
Lan Tianyu 2014-07-31 22:28:50 +08:00 committed by Rafael J. Wysocki
parent 515afdcba0
commit ea9c167d93
1 changed files with 1 additions and 0 deletions
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drivers/acpi/processor_driver.c
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@ -120,6 +120,7 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb,
unsigned int cpu = (unsigned long)hcpu;
struct acpi_processor *pr = per_cpu(processors, cpu);
struct acpi_device *device;
action &= ~CPU_TASKS_FROZEN;
/*
* CPU_STARTING and CPU_DYING must not sleep. Return here since