On Wednesday, June 21, 2017 03:04:34 PM Lee, Chun-Yi wrote:
> Kernel should decrements the reference count of acpi device
> when the scheduling of acpi hotplug work is failed, and
> evaluates _OST to notify BIOS the failure.
>
> v2:
> To simplify the code. (Andy Shevchenko)
>
> Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
> Cc: Len Brown <lenb@xxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxx>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Signed-off-by: "Lee, Chun-Yi" <jlee@xxxxxxxx>
Well, what about:
if (!hotplug_event) {
acpi_bus_put_acpi_device(adev);
return;
}
if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
return;
acpi_bus_put_acpi_device(adev);
err:
acpi_evaluate_ost(handle, type, ost_code, NULL);
This achieves the same as the patch below to my eyes, but looks
less convoluted IMO.
> ---
> drivers/acpi/bus.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 34fbe02..91adb71 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -427,12 +427,17 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
> (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
> driver->ops.notify(adev, type);
>
> - if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
> - return;
> + if (hotplug_event) {
> + if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
> + return;
> + goto err_put_device;
> + }
>
> acpi_bus_put_acpi_device(adev);
> return;
>
> + err_put_device:
> + acpi_bus_put_acpi_device(adev);
> err:
> acpi_evaluate_ost(handle, type, ost_code, NULL);
> }
>
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