From patchwork Tue Oct 8 09:56:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haishuang Yan X-Patchwork-Id: 1173158 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=cmss.chinamobile.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46nXnF2KGRz9s4Y for ; Tue, 8 Oct 2019 20:56:49 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730565AbfJHJ4p (ORCPT ); Tue, 8 Oct 2019 05:56:45 -0400 Received: from cmccmta3.chinamobile.com ([221.176.66.81]:2991 "EHLO cmccmta3.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730177AbfJHJ4a (ORCPT ); Tue, 8 Oct 2019 05:56:30 -0400 Received: from spf.mail.chinamobile.com (unknown[172.16.121.9]) by rmmx-syy-dmz-app09-12009 (RichMail) with SMTP id 2ee95d9c5d3b0c4-f0114; Tue, 08 Oct 2019 17:56:11 +0800 (CST) X-RM-TRANSID: 2ee95d9c5d3b0c4-f0114 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from localhost (unknown[223.105.0.241]) by rmsmtp-syy-appsvr05-12005 (RichMail) with SMTP id 2ee55d9c5d3a26f-8c8c6; Tue, 08 Oct 2019 17:56:10 +0800 (CST) X-RM-TRANSID: 2ee55d9c5d3a26f-8c8c6 From: Haishuang Yan To: "David S. Miller" Cc: William Tu , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Haishuang Yan Subject: [PATCH] ip6erspan: remove the incorrect mtu limit for ip6erspan Date: Tue, 8 Oct 2019 17:56:03 +0800 Message-Id: <1570528563-8062-1-git-send-email-yanhaishuang@cmss.chinamobile.com> X-Mailer: git-send-email 1.8.3.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ip6erspan driver calls ether_setup(), after commit 61e84623ace3 ("net: centralize net_device min/max MTU checking"), the range of mtu is [min_mtu, max_mtu], which is [68, 1500] by default. It causes the dev mtu of the erspan device to not be greater than 1500, this limit value is not correct for ip6erspan tap device. Signed-off-by: Haishuang Yan Acked-by: William Tu --- net/ipv6/ip6_gre.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index d5779d6..787d9f2 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -2192,6 +2192,7 @@ static void ip6erspan_tap_setup(struct net_device *dev) { ether_setup(dev); + dev->max_mtu = 0; dev->netdev_ops = &ip6erspan_netdev_ops; dev->needs_free_netdev = true; dev->priv_destructor = ip6gre_dev_free;