openwrt/target/linux/generic/pending-5.4/683-of_net-add-mac-address-to-of-tree.patch

--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -135,6 +135,30 @@ static int of_get_mac_address_mtd(struct
 	return -EINVAL;
 }
 
+static int of_add_mac_address(struct device_node *np, u8* addr)
+{
+	struct property *prop;
+
+	prop = of_find_property(np, "mac-address", NULL);
+	if (prop)
+		kfree(prop);
+
+	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		return 0;
+
+	prop->name = "mac-address";
+	prop->length = ETH_ALEN;
+	prop->value = kmemdup(addr, ETH_ALEN, GFP_KERNEL);
+	if (!prop->value || of_add_property(np, prop))
+		goto free;
+
+	return 0;
+free:
+	kfree(prop->value);
+	kfree(prop);
+	return -ENOMEM;
+}
 
 /**
  * Search the device tree for the best MAC address to use.  'mac-address' is
@@ -210,6 +234,7 @@ found:
 	if (!of_property_read_u32(np, "mac-address-increment", &mac_inc))
 		addr[inc_idx] += mac_inc;
 
+	of_add_mac_address(np, addr);
 	return ret;
 }
 EXPORT_SYMBOL(of_get_mac_address);