Re: [Patch v1 1/3] ACPI: add callback prepare() into acpi_hotplug_handler

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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




[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux