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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 9ABB9C4320E for ; Wed, 1 Sep 2021 09:22:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EA6B60238 for ; Wed, 1 Sep 2021 09:22:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243470AbhIAJXm (ORCPT ); Wed, 1 Sep 2021 05:23:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242789AbhIAJXl (ORCPT ); Wed, 1 Sep 2021 05:23:41 -0400 Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97BDDC061575; Wed, 1 Sep 2021 02:22:44 -0700 (PDT) Received: by mail-lj1-x236.google.com with SMTP id j12so3682687ljg.10; Wed, 01 Sep 2021 02:22:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AKMjpN2/BtbCv16EaWTjstGR2UORcQiJiYOiz1FEe10=; b=YiURxLIA7wFpM4b0F5gg4DacGxdsm3XThsNOHwtV3vJoaeoYh93YR30mmo1BAktYa+ 8MtX7pZHbGFMkh3zv9jc4xxDOQoLqoli0tOE1Y4PYSAfUB0T4qfi+fAfuSR1hwBFMSWg R4sxCRIr2u/DWQn2eOQd0uknd+lQVFCUieb1HPHKxznLjb7AodCf6M7rEcxT43kP0+hg JEJ01fTTpwd9J+5bRerUN07s5mCUXaBoCQDGAR46XXGMqJfron1hOHIj7BrPoW29YFt6 iDLANhXP4FcORz3gUDJi/OkzBbardzehf+FNoOzfqo1xGiQJZn8thi4TeRjhamTu94pm fgYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AKMjpN2/BtbCv16EaWTjstGR2UORcQiJiYOiz1FEe10=; b=T8oA4/VleLqCFgqxzJazatfdm/uNq0OqfuR8/+9qCVDreA4uq0qPAiLaZaARIjbSYe 1Bn1H7KAN+9yDaJy60FZtxi53ktPxfQv3euMMlUCVjRY3/2JPLKpDgIQem4TH3JOJyfM dnJDRzgooPQYHvQuwv9AddHJndd27bYHpbfJXsmMdCgKPVbdbTKV6jJNLYHR1MCd8MoV Ak8kEm6BEI6rDYEyoVgQfGPn334ar8Si1qWX7566oTuY67zBNqwRUZhOHRChBDuydHlg QO7qi8O4sLBSUN4M/YjEG80KGEjV7jvE885YpSA4LHjqffOTJEq/XEpXuEUefv02rSQe kQmA== X-Gm-Message-State: AOAM532cJpZt0i50NTpmPY8fwQkmFUZzm8Fup/LwG2WS6tIcMZvI5Emn kB8cniipz5Sp4/AagC1lMFtqSUY+hwE= X-Google-Smtp-Source: ABdhPJw0RYUDTe09wEx5vmivqCT1/uTx9mZ2U0ce0ciKVKGNSbuxAty0CIL3dCtO2RIGlCT8CoT+7g== X-Received: by 2002:a2e:8810:: with SMTP id x16mr29470515ljh.410.1630488162989; Wed, 01 Sep 2021 02:22:42 -0700 (PDT) Received: from localhost.lan (ip-194-187-74-233.konfederacka.maverick.com.pl. [194.187.74.233]) by smtp.gmail.com with ESMTPSA id d24sm2492372ljj.8.2021.09.01.02.22.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Sep 2021 02:22:42 -0700 (PDT) From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= To: Andrew Lunn , Vivien Didelot , Vladimir Oltean , "David S . Miller" , Jakub Kicinski Cc: Florian Fainelli , netdev@vger.kernel.org, =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , stable@vger.kernel.org Subject: [PATCH net 1/2] net: dsa: b53: Fix calculating number of switch ports Date: Wed, 1 Sep 2021 11:21:40 +0200 Message-Id: <20210901092141.6451-1-zajec5@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Rafał Miłecki It isn't true that CPU port is always the last one. Switches BCM5301x have 9 ports (port 6 being inactive) and they use port 5 as CPU by default (depending on design some other may be CPU ports too). A more reliable way of determining number of ports is to check for the last set bit in the "enabled_ports" bitfield. This fixes b53 internal state, it will allow providing accurate info to the DSA and is required to fix BCM5301x support. Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch") Cc: stable@vger.kernel.org Signed-off-by: Rafał Miłecki --- drivers/net/dsa/b53/b53_common.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index bd1417a66cbf..dcf9d7e5ae14 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -2612,9 +2612,8 @@ static int b53_switch_init(struct b53_device *dev) dev->cpu_port = 5; } - /* cpu port is always last */ - dev->num_ports = dev->cpu_port + 1; dev->enabled_ports |= BIT(dev->cpu_port); + dev->num_ports = fls(dev->enabled_ports); /* Include non standard CPU port built-in PHYs to be probed */ if (is539x(dev) || is531x5(dev)) { -- 2.26.2