linux-kernel - Re: [PATCH] hwmon: (acpi_power_meter) Install IPMI handler for Dell systems

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Message-ID: <d8e455b9-0a27-4361-8f92-9f1cb1fff537@gmx.de>
Date: Wed, 20 Dec 2023 16:09:51 +0100
From: Armin Wolf <W_Armin@....de>
To: Kai-Heng Feng <kai.heng.feng@...onical.com>, jdelvare@...e.com,
 linux@...ck-us.net
Cc: linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwmon: (acpi_power_meter) Install IPMI handler for Dell
 systems

Am 20.12.23 um 06:13 schrieb Kai-Heng Feng:

> The following error can be observed at boot:
> [    3.717920] ACPI Error: No handler for Region [SYSI] (00000000ab9e62c5) [IPMI] (20230628/evregion-130)
> [    3.717928] ACPI Error: Region IPMI (ID=7) has no handler (20230628/exfldio-261)
>
> [    3.717936] No Local Variables are initialized for Method [_GHL]
>
> [    3.717938] No Arguments are initialized for method [_GHL]
>
> [    3.717940] ACPI Error: Aborting method \_SB.PMI0._GHL due to previous error (AE_NOT_EXIST) (20230628/psparse-529)
> [    3.717949] ACPI Error: Aborting method \_SB.PMI0._PMC due to previous error (AE_NOT_EXIST) (20230628/psparse-529)
> [    3.717957] ACPI: \_SB_.PMI0: _PMC evaluation failed: AE_NOT_EXIST
>
> On Dell systems several methods of acpi_power_meter access variables in
> IPMI region [0], so request module 'ipmi_si' which will load 'acpi_ipmi'
> and install the region handler accordingly.

Hi,

this driver should be loaded automatically if an ACPI IPMI device is present.
Can you share the output of "acpidump"?

Armin Wolf

> [0] https://www.dell.com/support/manuals/en-us/redhat-enterprise-linux-v8.0/rhel8_rn_pub/advanced-configuration-and-power-interface-acpi-error-messages-displayed-in-dmesg?guid=guid-0d5ae482-1977-42cf-b417-3ed5c3f5ee62
>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
>   drivers/hwmon/acpi_power_meter.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c
> index 703666b95bf4..b9db53166bc9 100644
> --- a/drivers/hwmon/acpi_power_meter.c
> +++ b/drivers/hwmon/acpi_power_meter.c
> @@ -882,6 +882,8 @@ static int acpi_power_meter_add(struct acpi_device *device)
>   	strcpy(acpi_device_name(device), ACPI_POWER_METER_DEVICE_NAME);
>   	strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS);
>   	device->driver_data = resource;
> +	if (dmi_match(DMI_SYS_VENDOR, "Dell Inc."))
> +		request_module("ipmi_si");
>
>   	res = read_capabilities(resource);
>   	if (res)