diff --git a/drivers/net/mdio/mdio-mux.c b/drivers/net/mdio/mdio-mux.c
index bef4cce71287..e5dee7ad7c09 100644
--- a/drivers/net/mdio/mdio-mux.c
+++ b/drivers/net/mdio/mdio-mux.c
@@ -190,8 +190,8 @@ int mdio_mux_init(struct device *dev,
 		r = of_property_read_u32(child_bus_node, "reg", &v);
 		if (r) {
 			dev_err(dev,
-				"Error: Failed to find reg for child %pOF\n",
-				child_bus_node);
+				"Error: Failed to find reg for child %pOF: %pe\n",
+				child_bus_node, ERR_PTR(r));
 			continue;
 		}
 
@@ -229,8 +229,8 @@ int mdio_mux_init(struct device *dev,
 			}
 			devm_kfree(dev, cb);
 			dev_err(dev,
-				"Error: Failed to register MDIO bus for child %pOF\n",
-				child_bus_node);
+				"Error: Failed to register MDIO bus for child %pOF: %pe\n",
+				child_bus_node, ERR_PTR(r));
 		} else {
 			cb->next = pb->children;
 			pb->children = cb;