From dd3dd28241e02a88553e6676a18736e2cdfbaa4f Mon Sep 17 00:00:00 2001
From: Frank Rowand <frank.rowand@sony.com>
Date: Thu, 16 Apr 2020 16:42:46 -0500
Subject: [PATCH] of: unittest: kmemleak on changeset destroy

commit b3fb36ed694b05738d45218ea72cf7feb10ce2b1 upstream.

kmemleak reports several memory leaks from devicetree unittest.
This is the fix for problem 1 of 5.

of_unittest_changeset() reaches deeply into the dynamic devicetree
functions.  Several nodes were left with an elevated reference
count and thus were not properly cleaned up.  Fix the reference
counts so that the memory will be freed.

Fixes: 201c910bd689 ("of: Transactional DT support.")
Reported-by: Erhard F. <erhard_f@mailbox.org>
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/of/unittest.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index ca7823eef2b4..134c3d0776f9 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -776,6 +776,10 @@ static void __init of_unittest_changeset(void)
 	unittest(!of_changeset_revert(&chgset), "revert failed\n");
 
 	of_changeset_destroy(&chgset);
+
+	of_node_put(n1);
+	of_node_put(n2);
+	of_node_put(n21);
 #endif
 }