Hi Javier,
On Tue, Oct 08, 2024 at 06:10:27PM +0200, Javier Carrasco wrote:
> Introduce the scoped variant of the
> fwnode_for_each_available_child_node() to automatically decrement the
> child's refcount when it goes out of scope, removing the need for
> explicit calls to fwnode_handle_put().
>
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
> ---
> include/linux/property.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/include/linux/property.h b/include/linux/property.h
> index 61fc20e5f81f..b37508ecf606 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -168,6 +168,11 @@ struct fwnode_handle *fwnode_get_next_available_child_node(
> for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
> child = fwnode_get_next_available_child_node(fwnode, child))
>
> +#define fwnode_for_each_available_child_node_scoped(fwnode, child) \
> + for (struct fwnode_handle *child __free(fwnode_handle) = \
> + fwnode_get_next_available_child_node(fwnode, NULL); child; \
> + child = fwnode_get_next_available_child_node(fwnode, child))
> +
On OF, the implementation of the .get_next_child_node() fwnode op is:
static struct fwnode_handle *
of_fwnode_get_next_child_node(const struct fwnode_handle *fwnode,
struct fwnode_handle *child)
{
return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode),
to_of_node(child)));
}
On ACPI we currently have .device_is_available() returning false but that
probably should be returning true instead (it's been virtually unused
previously).
That makes fwnode_get_next_available_child_node() and
fwnode_get_next_child_node() equivalent on both ACPI and OF. Presumably
creating unavailable nodes would be useless on swnode, too.
So my question is: what do we gain by adding all these fwnode_*available()
helpers?
> struct fwnode_handle *device_get_next_child_node(const struct device *dev,
> struct fwnode_handle *child);
--
Regards,
Sakari Ailus
