On Fri, 2009-07-24 at 15:14 +0800, Pavel Machek wrote:
> On Fri 2009-07-24 11:02:12, Zhang Rui wrote:
> >
> > i8042 controller support device async actions.
> >
> > If boot option "dev_async_action" is added,
> > i8042 controller and its child devices can be
> > suspended/shutdown asynchronously.
> >
> > Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> > ---
> > drivers/input/serio/i8042.c | 10 +++++++++-
> > 1 file changed, 9 insertions(+), 1 deletion(-)
> >
> > Index: linux-2.6/drivers/input/serio/i8042.c
> > ===================================================================
> > --- linux-2.6.orig/drivers/input/serio/i8042.c
> > +++ linux-2.6/drivers/input/serio/i8042.c
> > @@ -1285,14 +1285,21 @@ static int __init i8042_init(void)
> > goto err_unregister_driver;
> > }
> >
> > - err = platform_device_add(i8042_platform_device);
> > + err = dev_async_register(&i8042_platform_device->dev,
> > + DEV_ASYNC_SUSPEND | DEV_ASYNC_SHUTDOWN);
> > if (err)
> > goto err_free_device;
> >
> > + err = platform_device_add(i8042_platform_device);
> > + if (err)
> > + goto err_dev_async_unregister;
> > +
> > panic_blink = i8042_panic_blink;
> >
> > return 0;
> >
> > + err_dev_async_unregister:
> > + dev_async_unregister(&i8042_platform_device->dev);
> > err_free_device:
> > platform_device_put(i8042_platform_device);
> > err_unregister_driver:
>
> I still do not like the interface: manually unregistering seems to be
> ugly & error prone.
>
hmm, yes, we can check device->dev_async and unregister it in driver
core, at device_unregister time.
then I think we should rename the interfaces to:
device_enable_async_action(dev, type),
and device_disable_async_action(dev)
so that they are more like driver core helper functions.
what do you think?
thanks,
rui
> > @@ -1305,6 +1312,7 @@ static int __init i8042_init(void)
> >
> > static void __exit i8042_exit(void)
> > {
> > + dev_async_unregister(&i8042_platform_device->dev);
> > platform_device_unregister(i8042_platform_device);
> > platform_driver_unregister(&i8042_driver);
> > i8042_platform_exit();
> >
>
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
