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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 9129CC2D0DB for ; Tue, 28 Jan 2020 14:13:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6448524688 for ; Tue, 28 Jan 2020 14:13:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580220837; bh=QrCtEDby5EejDnXICnuDtSiZo77F+2S9dkXYMUI0JJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VlX9v539+WNXyKwaEqFpwHTW9n8VGnU2dGixmEwr3+2bYGSYqj9kC4uwf+XIYj+iL j2nHMF8OPQ1KhzcQBKOajqLvQyDWZ2Lix34Dxpdm65fiX8FCCNqoRJYv8xTfX3SHMz IkFvCyz/4WDJpst/NKBXCYuMS3/97yrZWg83EJVE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727850AbgA1ONz (ORCPT ); Tue, 28 Jan 2020 09:13:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:35660 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728159AbgA1ONv (ORCPT ); Tue, 28 Jan 2020 09:13:51 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 705072468A; Tue, 28 Jan 2020 14:13:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580220830; bh=QrCtEDby5EejDnXICnuDtSiZo77F+2S9dkXYMUI0JJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MZ/IvheZwisZXadYLA8FwbKUCW3Y2zirGj6EPI3o9hsEOw5/37j2iaOwK0p4mqCU9 WuV1ZbZqjK+2s9xJ4mRcbw9KeP1oBPl9k7ynwcG1lqC55bAmZUonVdUhYl6FcitUxx a4ovucAeUWfo1oJwMGZUoHSzC4QxnuUdZV05cuf8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, James Hughes , Eric Dumazet , "David S. Miller" Subject: [PATCH 4.4 165/183] net: usb: lan78xx: Add .ndo_features_check Date: Tue, 28 Jan 2020 15:06:24 +0100 Message-Id: <20200128135846.154927116@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135829.486060649@linuxfoundation.org> References: <20200128135829.486060649@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: James Hughes [ Upstream commit ce896476c65d72b4b99fa09c2f33436b4198f034 ] As reported by Eric Dumazet, there are still some outstanding cases where the driver does not handle TSO correctly when skb's are over a certain size. Most cases have been fixed, this patch should ensure that forwarded SKB's that are greater than MAX_SINGLE_PACKET_SIZE - TX_OVERHEAD are software segmented and handled correctly. Signed-off-by: James Hughes Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/lan78xx.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include "lan78xx.h" @@ -2893,6 +2894,19 @@ void lan78xx_tx_timeout(struct net_devic tasklet_schedule(&dev->bh); } +static netdev_features_t lan78xx_features_check(struct sk_buff *skb, + struct net_device *netdev, + netdev_features_t features) +{ + if (skb->len + TX_OVERHEAD > MAX_SINGLE_PACKET_SIZE) + features &= ~NETIF_F_GSO_MASK; + + features = vlan_features_check(skb, features); + features = vxlan_features_check(skb, features); + + return features; +} + static const struct net_device_ops lan78xx_netdev_ops = { .ndo_open = lan78xx_open, .ndo_stop = lan78xx_stop, @@ -2906,6 +2920,7 @@ static const struct net_device_ops lan78 .ndo_set_features = lan78xx_set_features, .ndo_vlan_rx_add_vid = lan78xx_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = lan78xx_vlan_rx_kill_vid, + .ndo_features_check = lan78xx_features_check, }; static int lan78xx_probe(struct usb_interface *intf,