openwrt/target/linux/generic/pending-5.10/683-of_net-add-mac-address-to-of-tree.patch

From: David Bauer <mail@david-bauer.net>
Subject: of/net: Add MAC address to of tree

The label-mac logic relies on the mac-address property of a netdev
devices of-node. However, the mac address can also be stored as a
different property or read from e.g. an mtd device.

Create this node when reading a mac-address from OF if it does not
already exist and copy the mac-address used for the device to this
property. This way, the MAC address can be accessed using procfs.

Submitted-by: David Bauer <mail@david-bauer.net>
---
 drivers/of/of_net.c                           | 22 ++++++++++++++
 1 files changed, 22 insertions(+)

--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -95,6 +95,27 @@ static int of_get_mac_addr_nvmem(struct
 	return 0;
 }
 
+static int of_add_mac_address(struct device_node *np, u8* addr)
+{
+	struct property *prop;
+
+	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		return -ENOMEM;
+
+	prop->name = "mac-address";
+	prop->length = ETH_ALEN;
+	prop->value = kmemdup(addr, ETH_ALEN, GFP_KERNEL);
+	if (!prop->value || of_update_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
  * checked first, because that is supposed to contain to "most recent" MAC
@@ -171,6 +192,7 @@ found:
 		addr[5] = (mac_val >> 0) & 0xff;
 	}
 
+	of_add_mac_address(np, addr);
 	return ret;
 }
 EXPORT_SYMBOL(of_get_mac_address);