linux-kernel - Re: [PATCH 3/3] hwmon: (dell-smm) Improve warning messages

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Date:   Mon, 22 Aug 2022 09:21:24 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Armin Wolf <W_Armin@....de>
Cc:     pali@...nel.org, jdelvare@...e.com, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] hwmon: (dell-smm) Improve warning messages

On Sun, Aug 21, 2022 at 05:17:13PM +0200, Armin Wolf wrote:
> When dell-smm-hwmon is loaded on a machine with a buggy BIOS
> with the option "force" being enabled, it wrongly prints
> what the buggy features where disabled. This may cause
> users to wrongly assume that the driver still protects them
> from these BIOS bugs even with "force" being enabled.
> Change the warning message to avoid such a misunderstanding.
> 
> Tested on a Dell Inspiron 3505.
> 
> Signed-off-by: Armin Wolf <W_Armin@....de>
> ---
>  drivers/hwmon/dell-smm-hwmon.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
> index f7bab1a91b93..bf13852afe48 100644
> --- a/drivers/hwmon/dell-smm-hwmon.c
> +++ b/drivers/hwmon/dell-smm-hwmon.c
> @@ -1354,13 +1354,13 @@ static int __init dell_smm_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, data);
> 
>  	if (dmi_check_system(i8k_blacklist_fan_support_dmi_table)) {
> -		dev_warn(&pdev->dev, "broken Dell BIOS detected, disallow fan support\n");
> +		dev_warn(&pdev->dev, "BIOS has broken fan support\n");

I don't see that as improvement. It no longer mentions that fan support
is disabled if it is disabled.

>  		if (!force)
>  			data->disallow_fan_support = true;
>  	}
> 
>  	if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) {
> -		dev_warn(&pdev->dev, "broken Dell BIOS detected, disallow fan type call\n");
> +		dev_warn(&pdev->dev, "BIOS has broken fan type call\n");

Same as above.

>  		if (!force)
>  			data->disallow_fan_type_call = true;
>  	}
> --
> 2.30.2
>