linux-kernel - [PATCH v4 2/4] platform/x86: think-lmi: use correct possible

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Date:   Sun, 19 Mar 2023 20:32:19 -0400
From:   Mark Pearson <mpearson-lenovo@...ebb.ca>
To:     mpearson-lenovo@...ebb.ca
Cc:     hdegoede@...hat.com, markgross@...nel.org, markpearson@...ovo.com,
        thomas@...ch.de, pobrn@...tonmail.com,
        linux-kernel@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v4 2/4] platform/x86: think-lmi: use correct possible_values delimiters

firmware-attributes class requires that possible values are delimited
using ';' but the Lenovo firmware uses ',' instead.
Parse string and replace where appropriate.

Suggested-by: Thomas Weißschuh <linux@...ssschuh.net>
Fixes: a40cd7ef22fb ("platform/x86: think-lmi: Add WMI interface support on Lenovo platforms")
Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
---
Changes in v4
 - Moved earlier in the series as recommended
 - used strreplace function as recommended
Changes in v3: 
 - New patch added to the series. No v1 & v2.

 drivers/platform/x86/think-lmi.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index a765bf8c27d8..53f34b1adb8c 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -954,7 +954,7 @@ static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
 
 	if (setting->possible_values) {
 		/* Figure out what setting type is as BIOS does not return this */
-		if (strchr(setting->possible_values, ','))
+		if (strchr(setting->possible_values, ';'))
 			return sysfs_emit(buf, "enumeration\n");
 	}
 	/* Anything else is going to be a string */
@@ -1413,6 +1413,13 @@ static int tlmi_analyze(void)
 				pr_info("Error retrieving possible values for %d : %s\n",
 						i, setting->display_name);
 		}
+		/*
+		 * firmware-attributes requires that possible_values are separated by ';' but
+		 * Lenovo FW uses ','. Replace appropriately.
+		 */
+		if (setting->possible_values)
+			strreplace(setting->possible_values, ',', ';');
+
 		kobject_init(&setting->kobj, &tlmi_attr_setting_ktype);
 		tlmi_priv.setting[i] = setting;
 		kfree(item);
-- 
2.39.2