From patchwork Mon Dec 14 09:16:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 343875 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=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED 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 4BA86C1B0E3 for ; Mon, 14 Dec 2020 09:20:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 05156207B0 for ; Mon, 14 Dec 2020 09:20:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439840AbgLNJSn (ORCPT ); Mon, 14 Dec 2020 04:18:43 -0500 Received: from mx.baikalelectronics.com ([94.125.187.42]:46532 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728732AbgLNJSh (ORCPT ); Mon, 14 Dec 2020 04:18:37 -0500 From: Serge Semin To: Rob Herring , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Jakub Kicinski , Johan Hovold , Maxime Ripard , Joao Pinto , Lars Persson , Maxime Coquelin CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Vyacheslav Mitrofanov , , , , , Subject: [PATCH 17/25] net: stmmac: Use optional reset control API to work with stmmaceth Date: Mon, 14 Dec 2020 12:16:07 +0300 Message-ID: <20201214091616.13545-18-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20201214091616.13545-1-Sergey.Semin@baikalelectronics.ru> References: <20201214091616.13545-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Replace the manual implementation of the optional device reset control functionality with using the devm_reset_control_get_optional() method in order to improve the code maintainability and fix a potential bug. It will come out if the reset control handler has been specified, but the reset framework failed to request it. Note there is no need in checking the priv->plat->stmmac_rst pointer for being not NULL in order to perform the reset control assertion/deassertion because the passed NULL will be considered by the reset framework as absent optional reset control handler anyway. Signed-off-by: Serge Semin --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 ++++++++----------- .../ethernet/stmicro/stmmac/stmmac_platform.c | 14 +++++--------- 2 files changed, 13 insertions(+), 20 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index e9003684efc8..7f4d54d2fc72 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4889,15 +4889,13 @@ int stmmac_dvr_probe(struct device *device, if ((phyaddr >= 0) && (phyaddr <= 31)) priv->plat->phy_addr = phyaddr; - if (priv->plat->stmmac_rst) { - ret = reset_control_assert(priv->plat->stmmac_rst); - reset_control_deassert(priv->plat->stmmac_rst); - /* Some reset controllers have only reset callback instead of - * assert + deassert callbacks pair. - */ - if (ret == -ENOTSUPP) - reset_control_reset(priv->plat->stmmac_rst); - } + ret = reset_control_assert(priv->plat->stmmac_rst); + reset_control_deassert(priv->plat->stmmac_rst); + /* Some reset controllers have only reset callback instead of + * assert + deassert callbacks pair. + */ + if (ret == -ENOTSUPP) + reset_control_reset(priv->plat->stmmac_rst); /* Init MAC and get the capabilities */ ret = stmmac_hw_init(priv); @@ -5101,8 +5099,7 @@ int stmmac_dvr_remove(struct device *dev) stmmac_exit_fs(ndev); #endif phylink_destroy(priv->phylink); - if (priv->plat->stmmac_rst) - reset_control_assert(priv->plat->stmmac_rst); + reset_control_assert(priv->plat->stmmac_rst); if (priv->hw->pcs != STMMAC_PCS_TBI && priv->hw->pcs != STMMAC_PCS_RTBI) stmmac_mdio_unregister(ndev); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 367d1458d66d..38e8836861c4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -602,16 +602,12 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate); } - plat->stmmac_rst = devm_reset_control_get(&pdev->dev, - STMMAC_RESOURCE_NAME); + plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev, + STMMAC_RESOURCE_NAME); if (IS_ERR(plat->stmmac_rst)) { - if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER) { - rc = PTR_ERR(plat->stmmac_rst); - goto error_hw_init; - } - - dev_info(&pdev->dev, "no reset control found\n"); - plat->stmmac_rst = NULL; + rc = PTR_ERR(plat->stmmac_rst); + dev_err_probe(&pdev->dev, rc, "Cannot get reset control\n"); + goto error_hw_init; } return plat;