On Mon, May 29, 2023, at 7:51 AM, Ilpo Järvinen wrote:
> On Fri, 26 May 2023, Mark Pearson wrote:
>
>> Whilst reviewing some documentation from the FW team on using WMI on
>> Lenovo system I noticed that we weren't using Opcode support when
>> changing BIOS settings in the thinkLMI driver.
>>
>> We should be doing this to ensure we're future proof as the old
>> non-opcode mechanism has been deprecated.
>>
>> Tested on X1 Carbon G10 and G11.
>>
>> Signed-off-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
>> ---
>> Changes in v2: Update comment for clearer explanation of what the driver
>> is doing
>> Changes in v3: None. Version bump with rest of series
>>
>> drivers/platform/x86/think-lmi.c | 28 +++++++++++++++++++++++++++-
>> 1 file changed, 27 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
>> index 1138f770149d..2745224f62ab 100644
>> --- a/drivers/platform/x86/think-lmi.c
>> +++ b/drivers/platform/x86/think-lmi.c
>> @@ -1001,7 +1001,33 @@ static ssize_t current_value_store(struct kobject *kobj,
>> tlmi_priv.pwd_admin->save_signature);
>> if (ret)
>> goto out;
>> - } else { /* Non certiifcate based authentication */
>> + } else if (tlmi_priv.opcode_support) {
>> + /*
>> + * If opcode support is present use that interface.
>> + * 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.
>> + */
>> + set_str = kasprintf(GFP_KERNEL, "%s,%s;", setting->display_name,
>> + new_setting);
>
> Alignment.
OK - I assume you want the new_setting lined up under the bracket.
I've not seen that called out as a requirement (https://www.kernel.org/doc/html/v4.10/process/coding-style.html) but I don't mind fixing....but if you can point me at the specifics it's appreciated
>
>> + if (!set_str) {
>> + ret = -ENOMEM;
>> + goto out;
>> + }
>> +
>> + ret = tlmi_simple_call(LENOVO_SET_BIOS_SETTINGS_GUID, set_str);
>> + if (ret)
>> + goto out;
>> +
>> + if (tlmi_priv.pwd_admin->valid && tlmi_priv.pwd_admin->password[0]) {
>> + ret = tlmi_opcode_setting("WmiOpcodePasswordAdmin",
>> + tlmi_priv.pwd_admin->password);
>
> Align.
Ack.
>
>> + if (ret)
>> + goto out;
>> + }
>> +
>> + ret = tlmi_save_bios_settings("");
>> + } else { /* old non opcode based authentication method (deprecated)*/
>
> non missing hyphen.
non-opcode I assume?
>
> Missing space at the comment closing.
Will fix.
>
>> if (tlmi_priv.pwd_admin->valid && tlmi_priv.pwd_admin->password[0]) {
>> auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",
>> tlmi_priv.pwd_admin->password,
>>
>
> Except for those style issues, it look okay to me:
>
> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
>
Thanks for the review!
Mark
