Possible regression 2024.12.0 in parsing "aliases"

[Alexander Shiyan]

Changes to:
if (adapter->nr < 0 && adapter->dev.of_node)
adapter->nr = of_alias_get_id(adapter->dev.of_node, "i2c");

fix adding mux-adapter. Is this correct?

чт, 12 дек. 2024 г. в 14:31, Sascha Hauer <s.hauer at pengutronix.de>:
>
> On Thu, Dec 12, 2024 at 12:30:18PM +0300, Alexander Shiyan wrote:
> > Hello.
> >
> > There seems to be a bug in getting the ID in i2c_add_numbered_adapter()
> > It uses dev.parent instead of dev, for example:
> > of_alias_get_id(adapter->dev.of_node, "i2c");
> >
> > And with this everything works as expected.
>
> I don't understand this. In i2c-rockchip.c we have:
>
>         i2c->adapter.dev.parent = dev;
>         i2c->adapter.dev.of_node = dev->of_node;
>         i2c_add_numbered_adapter(&i2c->adapter);
>
> With that it shouldn't make a difference whether we do this:
>
> adapter->nr = of_alias_get_id(adapter->dev.parent->of_node, "i2c");
>
> or that:
>
> adapter->nr = of_alias_get_id(adapter->dev->of_node, "i2c");
>
> Should be the same device node both times.
>
> Sascha
>
>
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