linux-kernel - Re: [PATCH] acpi/_DSM: Add rev/func to warning message when acpi_evaluate

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Message-ID: <CAJZ5v0jjwFcs-w7c6tjzuZFdAdsOb7S_4yMvqVoJn_LmOiWJTA@mail.gmail.com>
Date: Thu, 29 Aug 2024 13:36:11 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: David Wang <00107082@....com>
Cc: rafael@...nel.org, lenb@...nel.org, linux-acpi@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] acpi/_DSM: Add rev/func to warning message when
 acpi_evaluate_dsm failed.

On Tue, Aug 27, 2024 at 1:35 AM David Wang <00107082@....com> wrote:
>
> When acpi_evaluate_dsm failed, the warning message lacks the rev
> and func information which is available and helpful.
> For example, iwlwifi would make _DSM queries for lari config,
> and when it failed, all warning messages are all the same:
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade (0x1001)
> With this patch, the warnings would be more informative:
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:1 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:6 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:7 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:8 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:3 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:9 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:10 (0x1001)
>   ACPI: \: failed to evaluate _DSM bf0212f2-788f-c64d-a5b3-1f738e285ade rev:0 func:12 (0x1001)
>
> Signed-off-by: David Wang <00107082@....com>
> ---
>  drivers/acpi/utils.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> index ae9384282273..6de542d99518 100644
> --- a/drivers/acpi/utils.c
> +++ b/drivers/acpi/utils.c
> @@ -801,7 +801,8 @@ acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 func,
>
>         if (ret != AE_NOT_FOUND)
>                 acpi_handle_warn(handle,
> -                                "failed to evaluate _DSM %pUb (0x%x)\n", guid, ret);
> +                                "failed to evaluate _DSM %pUb rev:%lld func:%lld (0x%x)\n",
> +                                guid, rev, func, ret);
>
>         return NULL;
>  }
> --

Applied as 6.12 material with some edits in the subject and changelog, thanks!