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platform/x86: think-lmi: Enable opcode support on BIOS settings

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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@squebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230601200552.4396-2-mpearson-lenovo@squebb.ca
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Mark Pearson 2023-06-01 16:05:46 -04:00 committed by Hans de Goede
parent c41e0121a1
commit 4ca9c3d404
1 changed files with 27 additions and 1 deletions
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28
drivers/platform/x86/think-lmi.c
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@ -1010,7 +1010,33 @@ 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);
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);
if (ret)
goto out;
}
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;",
tlmi_priv.pwd_admin->password,