diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index 77d73014bde3..11f53dc0c1c0 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -249,8 +249,10 @@ int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
 	}
 
 	if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
-	    nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name))
+	    nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) {
+		rc = -EMSGSIZE;
 		goto nla_put_failure;
+	}
 	dev_put(dev);
 
 	wpan_phy_put(phy);