From patchwork Sun May 2 23:06:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 12235457 X-Patchwork-Delegate: kuba@kernel.org 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=-15.8 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,USER_AGENT_GIT autolearn=ham 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 56E4BC43460 for ; Sun, 2 May 2021 23:07:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3ACAE6117A for ; Sun, 2 May 2021 23:07:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232563AbhEBXIP (ORCPT ); Sun, 2 May 2021 19:08:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232455AbhEBXIK (ORCPT ); Sun, 2 May 2021 19:08:10 -0400 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [IPv6:2a00:1450:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2CC5CC06174A; Sun, 2 May 2021 16:07:18 -0700 (PDT) Received: by mail-ed1-x535.google.com with SMTP id j28so4257353edy.9; Sun, 02 May 2021 16:07:18 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=QeLg2DTBbdqjeh99qWORPQ1IItT1PdbwBsRU/6Bi35I=; b=mk/nH3bP25/jntmJMwJvwUqzXVbPugt2wX/CQO82XNNsqbXQ9DINlEkvE/hpOfI4x3 s3bluP22h3xzClRJekwoKx31+DJPN0BJi0O0qG7Pihq/5cIAa2q0BneB69if1dwSypXh caQGyYMnmPRg3yw2ULGD/R1H2QnZBEGh8eg8/APaWK2IpgzeDycABAVrPL146uatpro/ I+okJUl93ipzPFcJ34dSD/HmDRRZ0tHCae6MBVRAN82yru5O+QWknfDwos5F4tafkqmk NbtHEF21e1i84CPxbMA701uV+VMNgAu02CYmLC8FkfzCiRX2sHZJvq/cvvGMkBAvqW8Z Bh+A== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=QeLg2DTBbdqjeh99qWORPQ1IItT1PdbwBsRU/6Bi35I=; b=rMROByqwXjjQuzwowqyGDbeFPx2UlQxCDf1HbHmvxEODzVJ3RGr5VacLf+G98X+53b 3IImkKsqE5QzW7+1wWSwjnniA6qHsO2UzNsRjnvi/R1r8uIOv9eCziMT1Y5JgZ+L6ahz j4/tqt87eMx2EWCDkjC90Cvwe/fZDollwhGOFGmwUeqLnCLBvMKPqBHqyX/2cu9PPP50 VYCOzTlIuNF4gNzgXIxHRFbpcV5DRveoragXjJBfREJl6nU9GYIwSpN6WsTXGCG+/1S+ lFis0Reo7nZ7KI0wEfx4Mp3LKRvAtlmg4h+azBS5aYEtsXQIXCkmnAbLR+pYOQl7NV49 5yMw== X-Gm-Message-State: AOAM533WFpxNKipIQeH5J7rdiQ/VW5tFQwM1/tqHhlafihEkgzFTIlDA GuxsggIKApVWGnIV1G80wVA= X-Google-Smtp-Source: ABdhPJxdaK2/A325W9NNK+KT0N9nXNP+y7xRjdoDUoFWo23S48P5D3VGsbRAqRumlv25IH+HTZ/eug== X-Received: by 2002:aa7:d594:: with SMTP id r20mr16747796edq.242.1619996836831; Sun, 02 May 2021 16:07:16 -0700 (PDT) Received: from Ansuel-xps.localdomain (93-35-189-2.ip56.fastwebnet.it. [93.35.189.2]) by smtp.googlemail.com with ESMTPSA id z17sm10003874ejc.69.2021.05.02.16.07.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 May 2021 16:07:16 -0700 (PDT) From: Ansuel Smith To: Florian Fainelli Cc: Ansuel Smith , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH net-next v2 03/17] net: mdio: ipq8064: enlarge sleep after read/write operation Date: Mon, 3 May 2021 01:06:55 +0200 Message-Id: <20210502230710.30676-3-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210502230710.30676-1-ansuelsmth@gmail.com> References: <20210502230710.30676-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC With the use of the qca8k dsa driver, some problem arised related to port status detection. With a load on a specific port (for example a simple speed test), the driver starts to behave in a strange way and garbage data is produced. To address this, enlarge the sleep delay and address a bug for the reg offset 31 that require additional delay for this specific reg. Signed-off-by: Ansuel Smith --- drivers/net/mdio/mdio-ipq8064.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c index 8ae5379eda9d..bba2fb0d6af8 100644 --- a/drivers/net/mdio/mdio-ipq8064.c +++ b/drivers/net/mdio/mdio-ipq8064.c @@ -65,7 +65,7 @@ ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset) ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); writel(miiaddr, priv->base + MII_ADDR_REG_ADDR); - usleep_range(8, 10); + usleep_range(10, 13); err = ipq8064_mdio_wait_busy(priv); if (err) @@ -90,7 +90,14 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data) ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); writel(miiaddr, priv->base + MII_ADDR_REG_ADDR); - usleep_range(8, 10); + + /* For the specific reg 31 extra time is needed or the next + * read will produce garbage data. + */ + if (reg_offset == 31) + usleep_range(30, 43); + else + usleep_range(10, 13); return ipq8064_mdio_wait_busy(priv); }