[PATCH v2 1/2] ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is disabled

[Rafael J. Wysocki]

On Tue, Jul 1, 2025 at 1:53 PM Catalin Marinas <catalin.marinas at arm.com> wrote:
>
> On Fri, Jun 20, 2025 at 09:13:07PM +0800, Li Chen wrote:
> > From: Li Chen <chenl311 at chinatelecom.cn>
> >
> > If CONFIG_ACPI_SPCR_TABLE is disabled, acpi_parse_spcr()
> > currently returns 0, which may incorrectly suggest that
> > SPCR parsing was successful. This patch changes the behavior
> > to return -ENODEV to clearly indicate that SPCR support
> > is not available.
> >
> > This prepares the codebase for future changes that depend
> > on acpi_parse_spcr() failure detection, such as suppressing
> > misleading console messages.
> >
> > Signed-off-by: Li Chen <chenl311 at chinatelecom.cn>
> > ---
> >  include/linux/acpi.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> > index f102c0fe34318..71e692f952905 100644
> > --- a/include/linux/acpi.h
> > +++ b/include/linux/acpi.h
> > @@ -1503,7 +1503,7 @@ int acpi_parse_spcr(bool enable_earlycon, bool enable_console);
> >  #else
> >  static inline int acpi_parse_spcr(bool enable_earlycon, bool enable_console)
> >  {
> > -     return 0;
> > +     return -ENODEV;
> >  }
> >  #endif
>
> Rafael, are you ok with this patch going via the arm64 tree?

Yes, I am, thanks!