[PATCH] of: do not copy properties if they already exist in the destination

[Jonas Richardsen]

---
 drivers/of/base.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b22959dabe..9bb4ae13db 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2346,6 +2346,9 @@ struct property *of_copy_property(const struct device_node *src,
 	if (!prop)
 		return NULL;
 
+	if (of_find_property(dst, propname, NULL))
+		return ERR_PTR(-EEXIST);
+
 	return of_new_property(dst, propname,
 			       of_property_get_value(prop), prop->length);
 }
-- 
2.42.0