From: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
[ Upstream commit cf337f27f3bfc4aeab4954c468239fd6233c7638 ]
Some attributes don't have any values available. In those cases don't
make the possible_values entry visible.
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/20230320003221.561750-3-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 | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index f10fe5ffe47df..b7428f5ec4c4c 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -525,9 +525,6 @@ static ssize_t possible_values_show(struct kobject *kobj, struct kobj_attribute
{
struct tlmi_attr_setting *setting = to_tlmi_attr_setting(kobj);
- if (!tlmi_priv.can_get_bios_selections)
- return -EOPNOTSUPP;
-
return sysfs_emit(buf, "%s\n", setting->possible_values);
}
@@ -617,6 +614,18 @@ static struct kobj_attribute attr_current_val = __ATTR_RW_MODE(current_value, 06
static struct kobj_attribute attr_type = __ATTR_RO(type);
+static umode_t attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct tlmi_attr_setting *setting = to_tlmi_attr_setting(kobj);
+
+ /* We don't want to display possible_values attributes if not available */
+ if ((attr == &attr_possible_values.attr) && (!setting->possible_values))
+ return 0;
+
+ return attr->mode;
+}
+
static struct attribute *tlmi_attrs[] = {
&attr_displ_name.attr,
&attr_current_val.attr,
@@ -626,6 +635,7 @@ static struct attribute *tlmi_attrs[] = {
};
static const struct attribute_group tlmi_attr_group = {
+ .is_visible = attr_is_visible,
.attrs = tlmi_attrs,
};
--
2.39.2
