linux-kernel - [PATCH 4.20 78/80] of: overlay: do not duplicate properties from overlay for new nodes

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Date:   Mon,  4 Feb 2019 11:37:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alan Tull <atull@...nel.org>,
        Frank Rowand <frank.rowand@...y.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.20 78/80] of: overlay: do not duplicate properties from overlay for new nodes

4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Frank Rowand <frank.rowand@...y.com>

commit 8814dc46bd9e347d4de55ec5bf8f16ea54470499 upstream.

When allocating a new node, add_changeset_node() was duplicating the
properties from the respective node in the overlay instead of
allocating a node with no properties.

When this patch is applied the errors reported by the devictree
unittest from patch "of: overlay: add tests to validate kfrees from
overlay removal" will no longer occur.  These error messages are of
the form:

   "OF: ERROR: ..."

and the unittest results will change from:

   ### dt-test ### end of unittest - 203 passed, 7 failed

to

   ### dt-test ### end of unittest - 210 passed, 0 failed

Tested-by: Alan Tull <atull@...nel.org>
Signed-off-by: Frank Rowand <frank.rowand@...y.com>
Cc: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/of/overlay.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -393,7 +393,7 @@ static int add_changeset_node(struct ove
 			break;
 
 	if (!tchild) {
-		tchild = __of_node_dup(node, node_kbasename);
+		tchild = __of_node_dup(NULL, node_kbasename);
 		if (!tchild)
 			return -ENOMEM;