From patchwork Sun Apr 3 18:37:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 556151 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94E54C433FE for ; Sun, 3 Apr 2022 18:38:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359814AbiDCSkT (ORCPT ); Sun, 3 Apr 2022 14:40:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359807AbiDCSkO (ORCPT ); Sun, 3 Apr 2022 14:40:14 -0400 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27FEE3982E for ; Sun, 3 Apr 2022 11:38:19 -0700 (PDT) Received: by mail-wm1-x330.google.com with SMTP id k124-20020a1ca182000000b0038c9cf6e2a6so4426251wme.0 for ; Sun, 03 Apr 2022 11:38:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=nKruD0hbBUx+nn+GE9l7RUaXsMouYslDmZcMsioEI1Q=; b=tS6lfS5YKhthifQEn7DXFwvlPV+7oDoF/M39bvyQgFcs/MoyTNnJb9dx6njIpfGGBK CGTMM/aa90fSTqbbupl0Kkd5txRKO+dNu1oYNwQpCIEYwMEEoytpf6Fo2yITgpHlDHzb /ZAkXqr5By6C54cUf0uhkgLQcsehyFIUkqD99d5hzscHS8jEcpKwy20kUiNnYq+6Prs9 9duAwSyle358ryQI6eWFMjN3flbgO1idl6XqcP/EffkwOPFr6ihiq8sIl9WA50aLSdop pnr1IXNI5mJ1hlMOtVC+0SZKXErVMibKmYMxbLecjg8gDiyCh09pt4y7KPFDMZIEse8N i4eQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=nKruD0hbBUx+nn+GE9l7RUaXsMouYslDmZcMsioEI1Q=; b=aFc3wioTuqvxijlq2pgQw++mMMMFsGkhsYDSR9SjCDLxjACv16b9qwL4mA8TjOBCwb cTdS9E7jko9ECgoP6xV4TbSyl26jLI8MFSj0yDtQYryIYATgFMb4rIS6uiDTSrQFcvLc +DrsXcoBpC4ZzMPGIgHpiSJ7woZkI4sVyRCoVvoHddC6QHE5iG21vCCRF6INw3zwxSW+ lvfI7PnHMFdNEQq5MQ38l7mBhxmvMZ049HA+7QOxGNvK3EUuzoyPckMV6EoJv1zNBwxh iKITAXroFuMkFoYBXwmbdjvnU7Drn93QNbKWKZnBV1esaGbB+ZgLGtaRf7MIqn8E9Yjr 3e+A== X-Gm-Message-State: AOAM531BybpOLl2k3eqW58Ta0IX7yrv5rOiYJQhzLnuqCI3cmBFLYXTo BVkyj4qoRJaFnjYZIaL0oMxnOA== X-Google-Smtp-Source: ABdhPJxoyKUpMhVGLN21dL7NOysUyDEc+IgIdwPtQz9qdiG1G2tF9cygag4LbRBU12x6OuMTMQYxWg== X-Received: by 2002:a05:600c:49a9:b0:38e:714d:5f49 with SMTP id h41-20020a05600c49a900b0038e714d5f49mr1115266wmp.201.1649011097633; Sun, 03 Apr 2022 11:38:17 -0700 (PDT) Received: from localhost.localdomain (xdsl-188-155-201-27.adslplus.ch. [188.155.201.27]) by smtp.gmail.com with ESMTPSA id l28-20020a05600c1d1c00b0038e72a95ec4sm593851wms.13.2022.04.03.11.38.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Apr 2022 11:38:17 -0700 (PDT) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" Cc: Stuart Yoder , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds , Rasmus Villemoes , Andy Shevchenko , Krzysztof Kozlowski Subject: [PATCH v6 03/12] fsl-mc: Use driver_set_override() instead of open-coding Date: Sun, 3 Apr 2022 20:37:49 +0200 Message-Id: <20220403183758.192236-4-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220403183758.192236-1-krzysztof.kozlowski@linaro.org> References: <20220403183758.192236-1-krzysztof.kozlowski@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Use a helper to set driver_override to reduce the amount of duplicated code. Make the driver_override field const char, because it is not modified by the core and it matches other subsystems. Signed-off-by: Krzysztof Kozlowski --- drivers/bus/fsl-mc/fsl-mc-bus.c | 25 ++++--------------------- include/linux/fsl/mc.h | 6 ++++-- 2 files changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 8fd4a356a86e..ba01c7f4de92 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -166,31 +166,14 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); - char *driver_override, *old = mc_dev->driver_override; - char *cp; + int ret; if (WARN_ON(dev->bus != &fsl_mc_bus_type)) return -EINVAL; - if (count >= (PAGE_SIZE - 1)) - return -EINVAL; - - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - if (strlen(driver_override)) { - mc_dev->driver_override = driver_override; - } else { - kfree(driver_override); - mc_dev->driver_override = NULL; - } - - kfree(old); + ret = driver_set_override(dev, &mc_dev->driver_override, buf, count); + if (ret) + return ret; return count; } diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h index 7b6c42bfb660..7a87ab9eba99 100644 --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -170,7 +170,9 @@ struct fsl_mc_obj_desc { * @regions: pointer to array of MMIO region entries * @irqs: pointer to array of pointers to interrupts allocated to this device * @resource: generic resource associated with this MC object device, if any. - * @driver_override: driver name to force a match + * @driver_override: driver name to force a match; do not set directly, + * because core frees it; use driver_set_override() to + * set or clear it. * * Generic device object for MC object devices that are "attached" to a * MC bus. @@ -204,7 +206,7 @@ struct fsl_mc_device { struct fsl_mc_device_irq **irqs; struct fsl_mc_resource *resource; struct device_link *consumer_link; - char *driver_override; + const char *driver_override; }; #define to_fsl_mc_device(_dev) \