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=-15.8 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=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 81314C433B4 for ; Fri, 14 May 2021 21:00:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 647D4613EB for ; Fri, 14 May 2021 21:00:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233039AbhENVCE (ORCPT ); Fri, 14 May 2021 17:02:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231394AbhENVBg (ORCPT ); Fri, 14 May 2021 17:01:36 -0400 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71E5EC06175F; Fri, 14 May 2021 14:00:23 -0700 (PDT) Received: by mail-ed1-x533.google.com with SMTP id a25so27221edr.12; Fri, 14 May 2021 14:00:23 -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=VioibLStxsJzsdnzJDRutTHOKHq5QHL/4DD7hb1v5Xs=; b=XQpYvhE9rA6rhxn3x3qakuUj8tCMepNPzoh1FC14OFn8ec1D6ekr1BugtTH/+ksAi5 vzAKyq2QYykpkDK5BylPgN7p8V63ODvVidRsjcyG0ZNSEjw/XLbr2H+fm1Ju7Co9DWWy aEWSPqFcYDivccxORtzm2swMIifaOlory3MUK2uzOgmUFTFvlV9MTbFCaTQZbjwztcR3 W75RmZVhdLHqigDT2oEpr8DaQ+uXcZgyrZp0Xxj0Jbrzxl+5dk5eNGss8P8bdTRB5aq7 20ML86FLupQZZ60gcKq+CrD8xmq3hBQdT/L4sOBBsfv3vF9O230Po2SGxrmoGGHHGTXK iYRw== 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=VioibLStxsJzsdnzJDRutTHOKHq5QHL/4DD7hb1v5Xs=; b=gA/5xhxOerwu1V3FJWokLJaDmDkjuAQ/hsuRTsiRus7k8YVbE727tTlrUACttIttZ4 WMfmpcYf4ipVJT4u/la70rPEZzGKIq3Xs7XqiwvRl+nmsCz3Ja/zqvzEzye6Yfh9wpWt NUySz9WhwgsDZS05r3WJMYKT+UZB+P8m6yjEYvZSD4uIMCYfsc57JRsdPTnVIUJpQoCq gBtKkbvjrf1jOakIzIvCa6MX8WVarAVm123tgEeMwyNOW3igFBPfxwj0ArwRzAcpP1YW BCc17ezagzZaQnF1LQj4TJDoNOTEW4tDOYs5Ly0ZjzBCKfrKv9ogUxaGL7s+DVlXwQBe AyRw== X-Gm-Message-State: AOAM5315vA8+6uybxFlCq2U3J4CkbhfPznBjQSgFp5ySnw+W/w2mHdFW NewwBSJjfg1mDmTAzzWf9uuUPtgHE2FNxw== X-Google-Smtp-Source: ABdhPJxCBJTNcTZKMOJab8zSSNCj29GIIUdxuVcaBYlLoG6rOor0Ot195Gz/5EUzs4N8lAKtkckUFQ== X-Received: by 2002:a05:6402:40d0:: with SMTP id z16mr8880516edb.104.1621026021960; Fri, 14 May 2021 14:00:21 -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 c3sm5455237edn.16.2021.05.14.14.00.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 May 2021 14:00:21 -0700 (PDT) From: Ansuel Smith To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Rob Herring , Heiner Kallweit , Russell King , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ansuel Smith Subject: [PATCH net-next v6 06/25] net: dsa: qca8k: handle error with qca8k_write operation Date: Fri, 14 May 2021 22:59:56 +0200 Message-Id: <20210514210015.18142-7-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210514210015.18142-1-ansuelsmth@gmail.com> References: <20210514210015.18142-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org qca8k_write can fail. Rework any user to handle error values and correctly return. Signed-off-by: Ansuel Smith Reviewed-by: Andrew Lunn --- drivers/net/dsa/qca8k.c | 102 ++++++++++++++++++++++++++-------------- 1 file changed, 67 insertions(+), 35 deletions(-) diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 5eb4d13fe0ba..2fdd7c2e74d5 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -168,7 +168,7 @@ qca8k_read(struct qca8k_priv *priv, u32 reg) return val; } -static void +static int qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val) { struct mii_bus *bus = priv->bus; @@ -187,6 +187,7 @@ qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val) exit: mutex_unlock(&bus->mdio_lock); + return ret; } static u32 @@ -247,9 +248,7 @@ qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val) { struct qca8k_priv *priv = (struct qca8k_priv *)ctx; - qca8k_write(priv, reg, val); - - return 0; + return qca8k_write(priv, reg, val); } static const struct regmap_range qca8k_readable_ranges[] = { @@ -367,6 +366,7 @@ static int qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port) { u32 reg; + int ret; /* Set the command and FDB index */ reg = QCA8K_ATU_FUNC_BUSY; @@ -377,7 +377,9 @@ qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port) } /* Write the function register triggering the table access */ - qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg); + ret = qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg); + if (ret) + return ret; /* wait for completion */ if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY)) @@ -447,6 +449,7 @@ static int qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid) { u32 reg; + int ret; /* Set the command and VLAN index */ reg = QCA8K_VTU_FUNC1_BUSY; @@ -454,7 +457,9 @@ qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid) reg |= vid << QCA8K_VTU_FUNC1_VID_S; /* Write the function register triggering the table access */ - qca8k_write(priv, QCA8K_REG_VTU_FUNC1, reg); + ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC1, reg); + if (ret) + return ret; /* wait for completion */ if (qca8k_busy_wait(priv, QCA8K_REG_VTU_FUNC1, QCA8K_VTU_FUNC1_BUSY)) @@ -502,7 +507,9 @@ qca8k_vlan_add(struct qca8k_priv *priv, u8 port, u16 vid, bool untagged) reg |= QCA8K_VTU_FUNC0_EG_MODE_TAG << QCA8K_VTU_FUNC0_EG_MODE_S(port); - qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg); + ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg); + if (ret) + return ret; ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid); out: @@ -545,7 +552,9 @@ qca8k_vlan_del(struct qca8k_priv *priv, u8 port, u16 vid) if (del) { ret = qca8k_vlan_access(priv, QCA8K_VLAN_PURGE, vid); } else { - qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg); + ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg); + if (ret) + return ret; ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid); } @@ -555,15 +564,20 @@ qca8k_vlan_del(struct qca8k_priv *priv, u8 port, u16 vid) return ret; } -static void +static int qca8k_mib_init(struct qca8k_priv *priv) { + int ret; + mutex_lock(&priv->reg_mutex); qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY); qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY); qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP); - qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB); + + ret = qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB); + mutex_unlock(&priv->reg_mutex); + return ret; } static void @@ -600,6 +614,7 @@ static int qca8k_mdio_write(struct qca8k_priv *priv, int port, u32 regnum, u16 data) { u32 phy, val; + int ret; if (regnum >= QCA8K_MDIO_MASTER_MAX_REG) return -EINVAL; @@ -613,7 +628,9 @@ qca8k_mdio_write(struct qca8k_priv *priv, int port, u32 regnum, u16 data) QCA8K_MDIO_MASTER_REG_ADDR(regnum) | QCA8K_MDIO_MASTER_DATA(data); - qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val); + ret = qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val); + if (ret) + return ret; return qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL, QCA8K_MDIO_MASTER_BUSY); @@ -623,6 +640,7 @@ static int qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum) { u32 phy, val; + int ret; if (regnum >= QCA8K_MDIO_MASTER_MAX_REG) return -EINVAL; @@ -635,7 +653,9 @@ qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum) QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) | QCA8K_MDIO_MASTER_REG_ADDR(regnum); - qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val); + ret = qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val); + if (ret) + return ret; if (qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL, QCA8K_MDIO_MASTER_BUSY)) @@ -766,12 +786,18 @@ qca8k_setup(struct dsa_switch *ds) QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); /* Enable MIB counters */ - qca8k_mib_init(priv); + ret = qca8k_mib_init(priv); + if (ret) + dev_warn(priv->dev, "mib init failed"); /* Enable QCA header mode on the cpu port */ - qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT), - QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S | - QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S); + ret = qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT), + QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S | + QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S); + if (ret) { + dev_err(priv->dev, "failed enabling QCA header mode"); + return ret; + } /* Disable forwarding by default on all ports */ for (i = 0; i < QCA8K_NUM_PORTS; i++) @@ -783,11 +809,13 @@ qca8k_setup(struct dsa_switch *ds) qca8k_port_set_status(priv, i, 0); /* Forward all unknown frames to CPU port for Linux processing */ - qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1, - BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S | - BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S | - BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S | - BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S); + ret = qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1, + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S); + if (ret) + return ret; /* Setup connection between CPU port & user ports */ for (i = 0; i < QCA8K_NUM_PORTS; i++) { @@ -815,16 +843,20 @@ qca8k_setup(struct dsa_switch *ds) qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i), 0xfff << shift, QCA8K_PORT_VID_DEF << shift); - qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i), - QCA8K_PORT_VLAN_CVID(QCA8K_PORT_VID_DEF) | - QCA8K_PORT_VLAN_SVID(QCA8K_PORT_VID_DEF)); + ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i), + QCA8K_PORT_VLAN_CVID(QCA8K_PORT_VID_DEF) | + QCA8K_PORT_VLAN_SVID(QCA8K_PORT_VID_DEF)); + if (ret) + return ret; } } /* Setup our port MTUs to match power on defaults */ for (i = 0; i < QCA8K_NUM_PORTS; i++) priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN; - qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN); + ret = qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN); + if (ret) + dev_warn(priv->dev, "failed setting MTU settings"); /* Flush the FDB table */ qca8k_fdb_flush(priv); @@ -1140,8 +1172,8 @@ qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee) { struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port); - int ret = 0; u32 reg; + int ret; mutex_lock(&priv->reg_mutex); reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL); @@ -1154,7 +1186,7 @@ qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee) reg |= lpi_en; else reg &= ~lpi_en; - qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg); + ret = qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg); exit: mutex_unlock(&priv->reg_mutex); @@ -1284,9 +1316,7 @@ qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) mtu = priv->port_mtu[i]; /* Include L2 header / FCS length */ - qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN); - - return 0; + return qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN); } static int @@ -1381,7 +1411,7 @@ qca8k_port_vlan_add(struct dsa_switch *ds, int port, bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; struct qca8k_priv *priv = ds->priv; - int ret = 0; + int ret; ret = qca8k_vlan_add(priv, port, vlan->vid, untagged); if (ret) { @@ -1394,9 +1424,11 @@ qca8k_port_vlan_add(struct dsa_switch *ds, int port, qca8k_rmw(priv, QCA8K_EGRESS_VLAN(port), 0xfff << shift, vlan->vid << shift); - qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(port), - QCA8K_PORT_VLAN_CVID(vlan->vid) | - QCA8K_PORT_VLAN_SVID(vlan->vid)); + ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(port), + QCA8K_PORT_VLAN_CVID(vlan->vid) | + QCA8K_PORT_VLAN_SVID(vlan->vid)); + if (ret) + return ret; } return 0; @@ -1407,7 +1439,7 @@ qca8k_port_vlan_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan) { struct qca8k_priv *priv = ds->priv; - int ret = 0; + int ret; ret = qca8k_vlan_del(priv, port, vlan->vid); if (ret) -- 2.30.2