The callback of CPU_STARTING event can't sleep and so acpi_cpu_soft_notify() return directly when CPU_STARTING event is triggered. But cpu hotplug also happens during S2RAM. The action will become CPU_STARTING_FROZEN. This patch is to fix missing check the frozen event.
Signed-off-by: Lan Tianyu <[email protected]> --- drivers/acpi/processor_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 4fcbd67..66e2249 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -125,7 +125,7 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb, * CPU_STARTING and CPU_DYING must not sleep. Return here since * acpi_bus_get_device() may sleep. */ - if (action == CPU_STARTING || action == CPU_DYING) + if ((action & ~CPU_TASKS_FROZEN) == CPU_STARTING || action == CPU_DYING) return NOTIFY_DONE; if (!pr || acpi_bus_get_device(pr->handle, &device)) -- 1.8.4.rc0.1.g8f6a3e5.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
