Re: [PATCH v1 1/2] driver core: Introduce device_find_first_child() helper

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Wed, Jun 08, 2022 at 01:29:08PM +0200, Rafael J. Wysocki wrote:
> On Tue, Jun 7, 2022 at 10:22 PM Andy Shevchenko
> <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:

...

> I would define it as
> 
> static int match_first(struct device *dev, void *)
> {
>        return 1;
> }
> 
> struct device *device_find_first_child(struct device *parent)
> {
>         return device_find_first_child(parent, NULL, match_first);
> }
> EXPORT_SYMBOL_GPL(device_find_first_child);
> 
> which is not that much more overhead.

With this we actually may simply provide a match function and it will make the
clean ups (like patch 2 in the series) almost the same without introducing a
device core call.

Something like

int device_match_any_for_find(struct device *dev, void *unused)
{
	return 1;
}

As I replied to Greg it's pity we can't use device_match_any()...

-- 
With Best Regards,
Andy Shevchenko