2017-07-07 06:23:16

by Chun-Yi Lee

Subject: [PATCH v3] acpi: handle the acpi hotplug schedule error

Kernel should decrements the reference count of acpi device
when the scheduling of acpi hotplug work failed, and evaluates
_OST to notify BIOS the failure.

v3:
More simplify the code. (Rafael J. Wysocki)

v2:
To simplify the code. (Andy Shevchenko)

Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Michal Hocko <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: "Lee, Chun-Yi" <[email protected]>
---
drivers/acpi/bus.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 784bda6..9d4fea6 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -432,11 +432,15 @@ 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)))
+ 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);
- return;

err:
acpi_evaluate_ost(handle, type, ost_code, NULL);
--
2.10.2

2017-07-07 13:24:19

by Rafael J. Wysocki

Subject: Re: [PATCH v3] acpi: handle the acpi hotplug schedule error

On Friday, July 07, 2017 02:22:42 PM Lee, Chun-Yi wrote:
> Kernel should decrements the reference count of acpi device
> when the scheduling of acpi hotplug work failed, and evaluates
> _OST to notify BIOS the failure.
>
> v3:
> More simplify the code. (Rafael J. Wysocki)
>
> v2:
> To simplify the code. (Andy Shevchenko)
>
> Cc: "Rafael J. Wysocki" <[email protected]>
> Cc: Len Brown <[email protected]>
> Cc: Michal Hocko <[email protected]>
> Reviewed-by: Andy Shevchenko <[email protected]>
> Signed-off-by: "Lee, Chun-Yi" <[email protected]>

This has been applied too AFAICS.

> ---
> drivers/acpi/bus.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 784bda6..9d4fea6 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -432,11 +432,15 @@ 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)))
> + 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);
> - return;
>
> err:
> acpi_evaluate_ost(handle, type, ost_code, NULL);
>

2017-07-08 03:25:41

by joeyli

Subject: Re: [PATCH v3] acpi: handle the acpi hotplug schedule error

Hi Rafael,

On Fri, Jul 07, 2017 at 03:16:40PM +0200, Rafael J. Wysocki wrote:
> On Friday, July 07, 2017 02:22:42 PM Lee, Chun-Yi wrote:
> > Kernel should decrements the reference count of acpi device
> > when the scheduling of acpi hotplug work failed, and evaluates
> > _OST to notify BIOS the failure.
> >
> > v3:
> > More simplify the code. (Rafael J. Wysocki)
> >
> > v2:
> > To simplify the code. (Andy Shevchenko)
> >
> > Cc: "Rafael J. Wysocki" <[email protected]>
> > Cc: Len Brown <[email protected]>
> > Cc: Michal Hocko <[email protected]>
> > Reviewed-by: Andy Shevchenko <[email protected]>
> > Signed-off-by: "Lee, Chun-Yi" <[email protected]>
>
> This has been applied too AFAICS.
>

I saw patches in linux-next.

Thanks for your review.

Joey Lee

> > ---
> > drivers/acpi/bus.c | 8 ++++++--
> > 1 file changed, 6 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> > index 784bda6..9d4fea6 100644
> > --- a/drivers/acpi/bus.c
> > +++ b/drivers/acpi/bus.c
> > @@ -432,11 +432,15 @@ 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)))
> > + 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);
> > - return;
> >
> > err:
> > acpi_evaluate_ost(handle, type, ost_code, NULL);
> >
>