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: 1391234 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=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=earth.li Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=earth.li header.i=@earth.li header.a=rsa-sha256 header.s=the header.b=aJHkwdWk; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CN9tP0Tbhz9sS8 for ; Sat, 31 Oct 2020 05:33:33 +1100 (AEDT) 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);