linux-kernel - Re: [PATCH 2/4] platform/x86: think-lmi: Correct System password interface

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Message-Id: <5e3f821d-1de2-4c48-be65-a3f89be00f33@app.fastmail.com>
Date:   Tue, 23 May 2023 12:19:46 -0400
From:   "Mark Pearson" <mpearson-lenovo@...ebb.ca>
To:     "Hans de Goede" <hdegoede@...hat.com>
Cc:     "markgross@...nel.org" <markgross@...nel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] platform/x86: think-lmi: Correct System password interface



On Tue, May 23, 2023, at 9:27 AM, Hans de Goede wrote:
> Hi,
>
> On 5/23/23 14:43, Mark Pearson wrote:
>> Thanks Hans
>> 
>> On Tue, May 23, 2023, at 6:46 AM, Hans de Goede wrote:
>>> Hi Mark,
>>>
>>> On 5/17/23 20:19, Mark Pearson wrote:
>>>> The system password identification was incorrect. This means that if
>>>> the password was enabled it wouldn't be detected correctly; and setting
>>>> it would not work.
>>>>
>>>> Correct these mistakes.
>>>>
>>>> Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
>>>> ---
>>>>  drivers/platform/x86/think-lmi.c | 4 ++--
>>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
>>>> index d9341305eba9..b8431d3b137f 100644
>>>> --- a/drivers/platform/x86/think-lmi.c
>>>> +++ b/drivers/platform/x86/think-lmi.c
>>>> @@ -171,7 +171,7 @@ MODULE_PARM_DESC(debug_support, "Enable debug command support");
>>>>  #define TLMI_POP_PWD (1 << 0)
>>>>  #define TLMI_PAP_PWD (1 << 1)
>>>>  #define TLMI_HDD_PWD (1 << 2)
>>>> -#define TLMI_SYS_PWD (1 << 3)
>>>> +#define TLMI_SYS_PWD (1 << 6)
>>>>  #define TLMI_CERT    (1 << 7)
>>>>  
>>>>  #define to_tlmi_pwd_setting(kobj)  container_of(kobj, struct tlmi_pwd_setting, kobj)
>>>> @@ -1504,7 +1504,7 @@ static int tlmi_analyze(void)
>>>>  		tlmi_priv.pwd_power->valid = true;
>>>>  
>>>>  	if (tlmi_priv.opcode_support) {
>>>> -		tlmi_priv.pwd_system = tlmi_create_auth("sys", "system");
>>>> +		tlmi_priv.pwd_system = tlmi_create_auth("smp", "system");
>>>
>>> "smp" ?
>> 
>> Yes - that is what is common across all the platforms.
>> https://docs.lenovocdrt.com/#/bios/wmi/wmi_guide?id=change-a-bios-password
>
> Ok, so smp stands for System Management Password I guess ? Might be 
> good to spell
> that out somehwere, e.g. in a comment.
>

Yes - and will do.

Mark