linux-kernel - Re: [PATCH] PRESERVE_BOOT_CONFIG function rev id doesn't match with spec.

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Message-ID: <CAJZ5v0gQ6Y5d5uieaM0FwnKO9yrRKpwZp=YsX5Qn7_4W5_+-eA@mail.gmail.com>
Date: Mon, 4 Nov 2024 14:04:25 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Zhou Shengqing <zhoushengqing@...info.com>
Cc: "Rafael J . Wysocki" <rafael@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, linux-acpi@...r.kernel.org, 
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PRESERVE_BOOT_CONFIG function rev id doesn't match with spec.

On Mon, Nov 4, 2024 at 7:14 AM Zhou Shengqing <zhoushengqing@...info.com> wrote:
>
> Per PCI Firmware Specification Revision 3.3 Table 4-7 _DSM Definitions
> for PCI. Preserve PCI Boot Configuration Initial Revision ID is 2. But
> the code is 1.
>
> Signed-off-by: Zhou Shengqing <zhoushengqing@...info.com>

I think there should be a Fixes tag?

> ---
>  drivers/pci/pci-acpi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
> index af370628e583..7a4cad0c1f00 100644
> --- a/drivers/pci/pci-acpi.c
> +++ b/drivers/pci/pci-acpi.c
> @@ -132,7 +132,7 @@ bool pci_acpi_preserve_config(struct pci_host_bridge *host_bridge)
>                  */
>                 obj = acpi_evaluate_dsm_typed(ACPI_HANDLE(&host_bridge->dev),
>                                               &pci_acpi_dsm_guid,
> -                                             1, DSM_PCI_PRESERVE_BOOT_CONFIG,
> +                                             2, DSM_PCI_PRESERVE_BOOT_CONFIG,
>                                               NULL, ACPI_TYPE_INTEGER);
>                 if (obj && obj->integer.value == 0)
>                         return true;
> --
> 2.39.2
>