# Re: \[net-next PATCH v5 15/15\] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver

- From: Andy Shevchenko \<hidden\>
- Date: 2021-02-15 15:21:25 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/02/6270249
- Thread: https://ratatoskr.run/netdev/2021/02/6262760/t.md

```text
On Mon, Feb 15, 2021 at 5:13 PM Andy Shevchenko
[ref] wrote:
>
> On Mon, Feb 15, 2021 at 2:33 PM Calvin Johnson
> [ref] wrote:
> > On Mon, Feb 08, 2021 at 04:28:31PM +0000, Russell King - ARM Linux admin wrote:
>
> ...
>
> > I think of_phy_is_fixed_link() needs to be fixed. I'll add below fix.
> >
> > --- a/drivers/net/mdio/of_mdio.c
> > +++ b/drivers/net/mdio/of_mdio.c
> > @@ -439,6 +439,9 @@ bool of_phy_is_fixed_link(struct device_node *np)
> >         int len, err;
> >         const char *managed;
> >
> > +       if (!np)
> > +               return false;
>
> AFAICS this doesn't add anything: all of the of_* APIs should handle
> OF nodes being NULL below.
>
> >         /* New binding */
> >         dn = of_get_child_by_name(np, "fixed-link");
> >         if (dn) {

Yes, of_get_next_child() and of_get_property() are NULL aware.

So, the check is redundant.

-- 
With Best Regards,
Andy Shevchenko
```