From patchwork Fri Oct 30 18:33:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan McDowell X-Patchwork-Id: 315953 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=-11.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_SANE_1 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 66F0AC00A89 for ; Fri, 30 Oct 2020 18:33:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF9AA20A8B for ; Fri, 30 Oct 2020 18:33:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=earth.li header.i=@earth.li header.b="aJHkwdWk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727260AbgJ3Sd2 (ORCPT ); Fri, 30 Oct 2020 14:33:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44854 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725975AbgJ3Sd1 (ORCPT ); Fri, 30 Oct 2020 14:33:27 -0400 Received: from the.earth.li (the.earth.li [IPv6:2a00:1098:86:4d:c0ff:ee:15:900d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D96DC0613D2; Fri, 30 Oct 2020 11:33:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=earth.li; s=the; h=Content-Type:MIME-Version:Message-ID:Subject:To:From:Date:Sender: Reply-To:Cc:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=arFiHimQtiFJb6n6XZtdH+1ty6P+gA0qV1YCQIOIjbk=; b=aJHkwdWk41/8ufHHLn2WXErvDb dSUEkmia/KuWPYiFNhG99EkAxwqDtmrRsVtEHBAsPL/Kof5rlu2W1676LwG/frn5/xY692AN+jiCi dCsEfi2RXzUzi+OTzezrj/v1XcjZAFtOfBaW/WcS6TwRem5OCX/4uctfIQysgAbh0SPHuub5SB3iO CsDE8JbSlwIymdTYGualZ2zoHw/i8qZwQyV346jMVe9jnuBfkodIkSjsa7/1N10/Gzkd8ydrmqstn 8bCyJzlVYMAkOoxkQ6gH30f25dFytHOMU8XnESJXrFWSi21vH9Dt05g/cVX7wb6dqU0tlN3wiZrD4 j2TNba8A==; Received: from noodles by the.earth.li with local (Exim 4.92) (envelope-from ) id 1kYZD9-0001uR-F7; Fri, 30 Oct 2020 18:33:15 +0000 Date: Fri, 30 Oct 2020 18:33:15 +0000 From: Jonathan McDowell To: DENG Qingfang , Vladimir Oltean , Andrew Lunn , Vivien Didelot , Florian Fainelli , David Miller , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net] net: dsa: qca8k: Fix port MTU setting Message-ID: <20201030183315.GA6736@earth.li> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The qca8k only supports a switch-wide MTU setting, and the code to take the max of all ports was only looking at the port currently being set. Fix to examine all ports. Reported-by: DENG Qingfang Fixes: f58d2598cf70 ("net: dsa: qca8k: implement the port MTU callbacks") Cc: stable@vger.kernel.org Signed-off-by: Jonathan McDowell Reviewed-by: Andrew Lunn --- drivers/net/dsa/qca8k.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 53064e0e1618..5bdac669a339 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -1219,8 +1219,8 @@ qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) priv->port_mtu[port] = new_mtu; for (i = 0; i < QCA8K_NUM_PORTS; i++) - if (priv->port_mtu[port] > mtu) - mtu = priv->port_mtu[port]; + if (priv->port_mtu[i] > mtu) + mtu = priv->port_mtu[i]; /* Include L2 header / FCS length */ qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN);