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Date: Thu, 31 Jul 2014 22:28:50 +0800 From: Lan Tianyu <tianyu.lan@...el.com> To: rjw@...ysocki.net, lenb@...nel.org Cc: Lan Tianyu <tianyu.lan@...el.com>, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH V2] 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@...el.com> --- Change since v1: unmark CPU_TASKS_FROZEN for all cpu events. drivers/acpi/processor_driver.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 4fcbd67..d9f7158 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -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 -- 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 majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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