linux-kernel - Re: [PATCH] platform/x86: think-lmi: Fix password opcode ordering for workstations

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Message-ID: <a6682692-531e-4a21-abde-8c2df518a1eb@redhat.com>
Date: Mon, 19 Feb 2024 12:36:22 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>
Cc: ilpo.jarvinen@...ux.intel.com, platform-driver-x86@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: think-lmi: Fix password opcode ordering for
 workstations

Hi,

On 2/9/24 16:23, Mark Pearson wrote:
> The Lenovo workstations require the password opcode to be run before
> the attribute value is changed (if Admin password is enabled).
> 
> Tested on some Thinkpads to confirm they are OK with this order too.
> 
> Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

I've also added the Fixes tag and Ilpo's Reviewed-by.

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans


> ---
>  drivers/platform/x86/think-lmi.c | 20 +++++++++++---------
>  1 file changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
> index 3a396b763c49..ce3e08815a8e 100644
> --- a/drivers/platform/x86/think-lmi.c
> +++ b/drivers/platform/x86/think-lmi.c
> @@ -1009,7 +1009,16 @@ static ssize_t current_value_store(struct kobject *kobj,
>  		 * Note - this sets the variable and then the password as separate
>  		 * WMI calls. Function tlmi_save_bios_settings will error if the
>  		 * password is incorrect.
> +		 * Workstation's require the opcode to be set before changing the
> +		 * attribute.
>  		 */
> +		if (tlmi_priv.pwd_admin->valid && tlmi_priv.pwd_admin->password[0]) {
> +			ret = tlmi_opcode_setting("WmiOpcodePasswordAdmin",
> +						  tlmi_priv.pwd_admin->password);
> +			if (ret)
> +				goto out;
> +		}
> +
>  		set_str = kasprintf(GFP_KERNEL, "%s,%s;", setting->display_name,
>  				    new_setting);
>  		if (!set_str) {
> @@ -1021,17 +1030,10 @@ static ssize_t current_value_store(struct kobject *kobj,
>  		if (ret)
>  			goto out;
>  
> -		if (tlmi_priv.save_mode == TLMI_SAVE_BULK) {
> +		if (tlmi_priv.save_mode == TLMI_SAVE_BULK)
>  			tlmi_priv.save_required = true;
> -		} else {
> -			if (tlmi_priv.pwd_admin->valid && tlmi_priv.pwd_admin->password[0]) {
> -				ret = tlmi_opcode_setting("WmiOpcodePasswordAdmin",
> -							  tlmi_priv.pwd_admin->password);
> -				if (ret)
> -					goto out;
> -			}
> +		else
>  			ret = tlmi_save_bios_settings("");
> -		}
>  	} else { /* old non-opcode based authentication method (deprecated) */
>  		if (tlmi_priv.pwd_admin->valid && tlmi_priv.pwd_admin->password[0]) {
>  			auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",