drm: Reject replacing property enum values
If the property already has the enum value WARN and bail.
Replacing enum values doesn't make sense to me.
Throw out the pointless list_empty() while at it.
Cc: Daniel Vetter <daniel@ffwll.ch>
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180306164849.2862-1-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c
index c37ac41..d77b0c4 100644
--- a/drivers/gpu/drm/drm_property.c
+++ b/drivers/gpu/drm/drm_property.c
@@ -390,14 +390,9 @@ int drm_property_add_enum(struct drm_property *property, int index,
(value > 63))
return -EINVAL;
- if (!list_empty(&property->enum_list)) {
- list_for_each_entry(prop_enum, &property->enum_list, head) {
- if (prop_enum->value == value) {
- strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
- prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
- return 0;
- }
- }
+ list_for_each_entry(prop_enum, &property->enum_list, head) {
+ if (WARN_ON(prop_enum->value == value))
+ return -EINVAL;
}
prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);