From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24650C2D0DB for ; Fri, 24 Jan 2020 11:33:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2CC9214DB for ; Fri, 24 Jan 2020 11:33:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579865612; bh=0EWNnKcmkirfL5xrjeBOgkRHRjt4/PuME6xr+LqLhFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cBJ5zT9QBCSIJe/8TY2052rf2noYh089H5thlrookmGiw4Hcibus48uOFW2VUPgbw wg9tAdlz33lWMpKRyIBnNEBJ7nHu/tlGfQVvt6pStsO0Gy0oOpT8Fji8UNOJktzvL7 Zm0tpNQf/x+zBwhKttfHkTA8uILkmExN1Ljww0Ng= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404596AbgAXLdb (ORCPT ); Fri, 24 Jan 2020 06:33:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:52966 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404587AbgAXLd1 (ORCPT ); Fri, 24 Jan 2020 06:33:27 -0500 Received: from localhost (ip-213-127-102-57.ip.prioritytelecom.net [213.127.102.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EF5F1206D4; Fri, 24 Jan 2020 11:33:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579865606; bh=0EWNnKcmkirfL5xrjeBOgkRHRjt4/PuME6xr+LqLhFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UuY4Whi3tWnq6H2yqjtfD5SBWWx/Xgx6TPIcMQhBytE8ZoXZtbiOI3iyTKftVT28/ xheUUKgps5YbCUVyYw5Mn3R3ycjn6swhff3xL3uiOj7wTYIy8ruByJ7lV2b+0mEOqZ 0/3iXLIAiHGwBdsUxFkJ8YKCrsf5+8Z4lgADlJI0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Haishuang Yan , William Tu , Jakub Kicinski , Sasha Levin Subject: [PATCH 4.19 592/639] ip6erspan: remove the incorrect mtu limit for ip6erspan Date: Fri, 24 Jan 2020 10:32:42 +0100 Message-Id: <20200124093203.573201729@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124093047.008739095@linuxfoundation.org> References: <20200124093047.008739095@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Haishuang Yan [ Upstream commit 4123f637a5129470ff9d3cb00a5a4e213f2e15cc ] 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. Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking") Signed-off-by: Haishuang Yan Acked-by: William Tu Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- 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 b3515a4f13039..1f2d0022ba6fd 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -2218,6 +2218,7 @@ 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; -- 2.20.1