diff mbox

[v3,08/12] of: overlay: loosen overly strict phandle clash check

Message ID 1508283392-18252-9-git-send-email-frowand.list@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Frank Rowand Oct. 17, 2017, 11:36 p.m. UTC 
From: Frank Rowand <frank.rowand@sony.com>

When an overlay contains a node that already exists in
the live device tree, the overlay node is not allowed
to change the phandle of the existing node.

The existing check refused to allow an overlay node to
set the node phandle even when the existing node did
not have a phandle.  Relax the check to allow an
overlay node to set the phandle value if the existing
node does not have a phandle.

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
---
 drivers/of/overlay.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 4cdee169a5ab..791753321ed2 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -311,10 +311,10 @@  static int add_changeset_node(struct overlay_changeset *ovcs,
 		return build_changeset_next_level(ovcs, tchild, node, 0);
 	}
 
-	if (node->phandle)
-		return -EINVAL;
-
-	ret = build_changeset_next_level(ovcs, tchild, node, 0);
+	if (node->phandle && tchild->phandle)
+		ret = -EINVAL;
+	else
+		ret = build_changeset_next_level(ovcs, tchild, node, 0);
 	of_node_put(tchild);
 
 	return ret;