[SeaBIOS] [PATCH] acpi: LNKS is not needed

Laszlo Ersek lersek at redhat.com
Tue Aug 7 15:11:38 CEST 2012


On 08/07/12 15:01, Paolo Bonzini wrote:
> LNKS is a bit strange in that it reuses the same PIIX register as LNKA,
> but has a different interrupt.  This means that the _CRS it returns will
> not be one of the possible resources from _PRS.  This shows up in the
> Linux boot logs as
> 
>    ACPI: PCI Interrupt Link [LNKS] (IRQs 9) *0
> 
> Instead of that, we can simply use a hardwired interrupt index.
> 
> Cc: Gleb Natapov <gnatapov at redhat.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
> ---
>  src/acpi-dsdt.dsl | 16 ++++------------
>  1 file modificato, 4 inserzioni(+), 12 rimozioni(-)
> 
> diff --git a/src/acpi-dsdt.dsl b/src/acpi-dsdt.dsl
> index 083e2be..66ca853 100644
> --- a/src/acpi-dsdt.dsl
> +++ b/src/acpi-dsdt.dsl
> @@ -86,7 +86,10 @@ DefinitionBlock (
>  #define prt_slot3(nr) prt_slot(nr, LNKC, LNKD, LNKA, LNKB)
>                 prt_slot0(0x0000),
>                 /* Device 1 is power mgmt device, and can only use irq 9 */
> -               prt_slot(0x0001, LNKS, LNKB, LNKC, LNKD),
> +               Package() { 0x1ffff, 0,    0, 9 },
> +               Package() { 0x1ffff, 1, LNKB, 0 },
> +               Package() { 0x1ffff, 2, LNKC, 0 },
> +               Package() { 0x1ffff, 3, LNKD, 0 }
>                 prt_slot2(0x0002),
>                 prt_slot3(0x0003),
>                 prt_slot0(0x0004),
> @@ -653,17 +656,6 @@ DefinitionBlock (
>              Method (_CRS, 0, NotSerialized) { Return (IQCR(PRQ3)) }
>              Method (_SRS, 1, NotSerialized) { SETIRQ(PRQ3, Arg0) }
>          }
> -        Device(LNKS) {
> -            Name(_HID, EISAID("PNP0C0F"))     // PCI interrupt link
> -            Name(_UID, 5)
> -            Name(_PRS, ResourceTemplate() {
> -                Interrupt (, Level, ActiveHigh, Shared)
> -                    { 9 }
> -            })
> -            Method (_STA, 0, NotSerialized) { Return (IQST(PRQ0)) }
> -            Method (_DIS, 0, NotSerialized) { DISIRQ(PRQ0) }
> -            Method (_CRS, 0, NotSerialized) { Return (IQCR(PRQ0)) }
> -        }
>      }
>  
>  /****************************************************************

Reviewed-by: Laszlo Ersek <lersek at redhat.com>

Thanks!
Laszlo



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