Re: [PATCH v2 1/8] ACPI / PM: Run wakeup notify handlers synchronously

[Rafael J. Wysocki]

On Wed, Jun 14, 2017 at 8:09 PM, Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
> On Mon, Jun 12, 2017 at 10:48:41PM +0200, Rafael J. Wysocki wrote:
>> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>>
>> The work functions provided by the users of acpi_add_pm_notifier()
>> should be run synchronously before re-enabling the wakeup GPE in
>> case they are used to clear the status and/or disable the wakeup
>> signaling at the source.  Otherwise, which is the case currently in
>> the PCI bus type code, the same wakeup event may be signaled for
>> multiple times while the execution of the work function in response
>> to it has already been queued up.
>>
>> Fortunately, acpi_add_pm_notifier() is only used by PCI and by
>> ACPI device PM code internally, so the change is relatively
>> straightforward to make.
>>
>> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>
> Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

Thanks!