Re: [RFC PATCH v3 3/9] software_node: Fix failure to hold refcount in software_node_get_next_child

Sakari Ailus
2020-10-21T09:38:08Z

On Wed, Oct 21, 2020 at 12:33:21PM +0300, Andy Shevchenko wrote:
> On Wed, Oct 21, 2020 at 12:25:28AM +0100, Dan Scally wrote:
> > On 20/10/2020 14:31, Sakari Ailus wrote:
> > > On Mon, Oct 19, 2020 at 11:58:57PM +0100, Daniel Scally wrote:
>
> > >> + return software_node_get(&c->fwnode);
> > > I believe similarly, the function should drop the reference to the previous
> > > node, and not expect the caller to do this. The OF equivalent does the
> > > same.
> >
> > I think I prefer it this way myself, since the alternative is having to
> > explicitly call *_node_get() on a returned child if you want to keep it
> > but also keep iterating. But I agree that it's important to take a
> > consistent approach. I'll add that too; this will mean
> > swnode_graph_find_next_port() and
> > software_node_graph_get_next_endpoint() in patch 4 of this series will
> > need changing slightly to square away their references.
>
> What about ACPI case? Does it square?

In ACPI, we seem to assume these nodes are always there and thus don't need
reference counting.

--
Sakari Ailus