From: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
[ Upstream commit 8a02d70679fc1c434401863333c8ea7dbf201494 ]
ThinkStation platforms don't support the API to return possible_values
but instead embed it in the settings string.
Try and extract this information and set the possible_values attribute
appropriately.
Fixes: a40cd7ef22fb ("platform/x86: think-lmi: Add WMI interface support on Lenovo platforms")
Signed-off-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230320003221.561750-4-mpearson-lenovo@xxxxxxxxx
Reviewed-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/platform/x86/think-lmi.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index b7428f5ec4c4c..c9ed2644bb8a6 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -943,6 +943,26 @@ static int tlmi_analyze(void)
if (ret || !setting->possible_values)
pr_info("Error retrieving possible values for %d : %s\n",
i, setting->display_name);
+ } else {
+ /*
+ * Older Thinkstations don't support the bios_selections API.
+ * Instead they store this as a [Optional:Option1,Option2] section of the
+ * name string.
+ * Try and pull that out if it's available.
+ */
+ char *item, *optstart, *optend;
+
+ if (!tlmi_setting(setting->index, &item, LENOVO_BIOS_SETTING_GUID)) {
+ optstart = strstr(item, "[Optional:");
+ if (optstart) {
+ optstart += strlen("[Optional:");
+ optend = strstr(optstart, "]");
+ if (optend)
+ setting->possible_values =
+ kstrndup(optstart, optend - optstart,
+ GFP_KERNEL);
+ }
+ }
}
/*
* firmware-attributes requires that possible_values are separated by ';' but
--
2.39.2
