On Tuesday, January 21, 2014 02:14:57 PM Toshi Kani wrote: > On Sat, 2014-01-18 at 10:48 +0800, Jiang Liu wrote: > > Add callback prepare() into acpi_hotplug_handler, which will get called > > at the very beginning of ACPI hotplug event handler. The ACPI core will > > ignore the event if prepare() returns NOTIFY_STOP. > > > > Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> > > --- > > drivers/acpi/scan.c | 4 ++++ > > include/acpi/acpi_bus.h | 1 + > > 2 files changed, 5 insertions(+) > > > > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c > > index fd39459..6b0f419 100644 > > --- a/drivers/acpi/scan.c > > +++ b/drivers/acpi/scan.c > > @@ -392,6 +392,10 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) > > struct acpi_device *adev; > > acpi_status status; > > > > + if (handler->prepare && > > + handler->prepare(handle, type, data) == NOTIFY_STOP) > > + return; > > The OS is responsible for calling _OST when it is implemented. So you > cannot just return here. See acpi_hotplug_unsupported(handle, type) > next line. Also, please describe why prepare() needs to be added. I don't think it's needed any more, please see: http://marc.info/?l=linux-acpi&m=139001691317575&w=2 Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
