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SubjectRe: [Linaro-acpi] [RFC PATCH for Juno 1/2] net: smsc911x add support for probing from ACPI
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On Mon, 1 Sep 2014 16:28:54 +0100, Graeme Gregory <graeme.gregory@linaro.org> wrote:
> On Mon, Sep 01, 2014 at 05:17:51PM +0200, Arnd Bergmann wrote:
> > On Monday 01 September 2014 23:06:00 Hanjun Guo wrote:
> > > +#ifdef CONFIG_ACPI
> > > +/* Configure some sensible defaults for ACPI mode */
> > > +static int smsc911x_probe_config_acpi(struct smsc911x_platform_config *config,
> > > + acpi_handle *ahandle)
> > > +{
> > > + if (!ahandle)
> > > + return -ENOSYS;
> > > +
> > > + config->phy_interface = PHY_INTERFACE_MODE_MII;
> > >
> >
> > Please remove the #ifdef and use
> >
> > if (!IS_ENABLED(CONFIG_ACPI) || !ahandle)
> >
> > to check for ACPI support. This should result in the same object code
> > in all cases, but give better compile-time coverage when ACPI is
> > disabled.
> >
> struct acpi_handle does not exist in the case !CONFIG_ACPI
>
> > Also, -ENOSYS is probably the wrong return value. I think you mean
> > -ENXIO.
> >
> Yes that would make sense thanks.
>
> Not sure if we are planning to actually upstream this patch, I guess it
> depends if ARM start shipping Junos with the ACPI tables loaded on them.

I think we do want this upstreamed. Juno is intended to be a readily
available reference platform, regardless of the firmware loaded when
shipped. There will be users who use it as a test platform for ACPI
development.

g.


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