switchdev: respect SKIP_EOPNOTSUPP flag in case there is no recursion

Caller passing down the SKIP_EOPNOTSUPP switchdev flag expects that
-EOPNOTSUPP cannot be returned. But in case of direct op call without
recurtion, this may happen. So fix this by checking it always on the
end of __switchdev_port_attr_set function.

Fixes: 464314ea6c11 ("switchdev: skip over ports returning -EOPNOTSUPP when recursing ports")
Signed-off-by: Jiri Pirko <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/switchdev/switchdev.c

···
 	struct list_head *iter;
 	int err = -EOPNOTSUPP;
 
-	if (ops && ops->switchdev_port_attr_set)
-		return ops->switchdev_port_attr_set(dev, attr, trans);
+	if (ops && ops->switchdev_port_attr_set) {
+		err = ops->switchdev_port_attr_set(dev, attr, trans);
+		goto done;
+	}
 
 	if (attr->flags & SWITCHDEV_F_NO_RECURSE)
 		goto done;
···
 
 	netdev_for_each_lower_dev(dev, lower_dev, iter) {
 		err = __switchdev_port_attr_set(lower_dev, attr, trans);
-		if (err == -EOPNOTSUPP &&
-		    attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP)
-			continue;
 		if (err)
 			break;
 	}