Hello Rafael,
I spotted an issue with this patch. Please see below.
On Fri, 15 May 2020 at 18:32, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
>
> On Fri, May 15, 2020 at 11:37 AM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
> >
> > Per the ACPI spec, interrupts in the range [0, 255] may be handled
> > in AML using individual methods whose naming is based on the format
> > _Exx or _Lxx, where xx is the hex representation of the interrupt
> > index.
> >
> > Add support for this missing feature to our ACPI GED driver.
> >
> > Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
> > Cc: Len Brown <lenb@xxxxxxxxxx>
> > Cc: linux-acpi@xxxxxxxxxxxxxxx
> > Cc: <stable@xxxxxxxxxxxxxxx> # v4.9+
> > Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
> > ---
> > drivers/acpi/evged.c | 22 +++++++++++++++++---
> > 1 file changed, 19 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/acpi/evged.c b/drivers/acpi/evged.c
> > index aba0d0027586..6d7a522952bf 100644
> > --- a/drivers/acpi/evged.c
> > +++ b/drivers/acpi/evged.c
> > @@ -79,6 +79,8 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares,
> > struct resource r;
> > struct acpi_resource_irq *p = &ares->data.irq;
> > struct acpi_resource_extended_irq *pext = &ares->data.extended_irq;
> > + char ev_name[5];
> > + u8 trigger;
> >
> > if (ares->type == ACPI_RESOURCE_TYPE_END_TAG)
> > return AE_OK;
> > @@ -87,14 +89,28 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares,
> > dev_err(dev, "unable to parse IRQ resource\n");
> > return AE_ERROR;
> > }
> > - if (ares->type == ACPI_RESOURCE_TYPE_IRQ)
> > + if (ares->type == ACPI_RESOURCE_TYPE_IRQ) {
> > gsi = p->interrupts[0];
> > - else
> > + trigger = p->triggering;
> > + } else {
> > gsi = pext->interrupts[0];
> > + trigger = p->triggering;
This should be 'pext->triggering' instead.
In practice, it doesn't matter, since p and pext point to the same
union, and the 'triggering' field happens to be at the same offset.
But it should still be fixed, of course.
Would you prefer a followup patch? Or can you fix it locally?
> > + }
> >
> > irq = r.start;
> >
> > - if (ACPI_FAILURE(acpi_get_handle(handle, "_EVT", &evt_handle))) {
> > + switch (gsi) {
> > + case 0 ... 255:
> > + sprintf(ev_name, "_%c%02hhX",
> > + trigger == ACPI_EDGE_SENSITIVE ? 'E' : 'L', gsi);
> > +
> > + if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle)))
> > + break;
> > + /* fall through */
> > + default:
> > + if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle)))
> > + break;
> > +
> > dev_err(dev, "cannot locate _EVT method\n");
> > return AE_ERROR;
> > }
> > --
>
> Applied as 5.8 material, thanks!
