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-rw-r--r--drivers/of/unittest-data/overlay_bad_add_dup_prop.dts39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts
new file mode 100644
index 000000000..6327d1ffb
--- /dev/null
+++ b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/plugin/;
+
+/*
+ * &electric_1/motor-1/electric and &spin_ctrl_1/electric are the same node:
+ * /testcase-data-2/substation@100/motor-1/electric
+ *
+ * Thus the property "rpm_avail" in each fragment will
+ * result in an attempt to update the same property twice.
+ * This will result in an error and the overlay apply
+ * will fail.
+ *
+ * The previous version of this test did not include the extra
+ * level of node 'electric'. That resulted in the 'rpm_avail'
+ * property being located in the pre-existing node 'motor-1'.
+ * Modifying a property results in a WARNING that a memory leak
+ * will occur if the overlay is removed. Since the overlay apply
+ * fails, the memory leak does actually occur, and kmemleak will
+ * further report the memory leak if CONFIG_DEBUG_KMEMLEAK is
+ * enabled. Adding the overlay node 'electric' avoids the
+ * memory leak and thus people who use kmemleak will not
+ * have to debug this non-problem again.
+ */
+
+&electric_1 {
+
+ motor-1 {
+ electric {
+ rpm_avail = < 100 >;
+ };
+ };
+};
+
+&spin_ctrl_1 {
+ electric {
+ rpm_avail = < 100 200 >;
+ };
+};