From patchwork Sun Feb 27 13:52:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12761730 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 D628FC4332F for ; Sun, 27 Feb 2022 13:53:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231330AbiB0Nx4 (ORCPT ); Sun, 27 Feb 2022 08:53:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231267AbiB0Nxb (ORCPT ); Sun, 27 Feb 2022 08:53:31 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C96EDE0A4 for ; Sun, 27 Feb 2022 05:52:53 -0800 (PST) Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 29E5740A80 for ; Sun, 27 Feb 2022 13:52:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645969967; bh=m4/zffFNkZQ1c8QkZX27EHIqdt+D+lrYYYcC+6RBnKM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ueDhaYh+23F7yoeYNZcWvvzixtmhq+FchPKeuFEqY46Kop/WjA+g0aCSnUpXESkvZ 1oXx+llw0XE7NDIE01gIbiLnJD1uLnCROr2n5MRSwXUfNFgNVw6GoD0PQvas1VHf1E B1/xdE34pIKPPCfcVvpMaMi96puXJ4SxbFCS6hPpgICKV5WbAwEAYIFhOKEy9lu6iC TgnZkfWV8zpqxzx6VC30CbrbB6Pi8B9jiTqQWf48X53uf48nuUXIM8WFN7+/rFVaKb ZpKW7uIjlPssmJuqrp4fVyh4XR6IPz2HH39XtglChgDygA3wogM8Qyr7vdCRa/I57b 8HmTaalyJgtiQ== Received: by mail-ed1-f70.google.com with SMTP id f9-20020a0564021e8900b00412d0a6ef0dso4242831edf.11 for ; Sun, 27 Feb 2022 05:52:47 -0800 (PST) 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=m4/zffFNkZQ1c8QkZX27EHIqdt+D+lrYYYcC+6RBnKM=; b=5eH2s43dOwc8vklWu+sV0wjOG5hQbBOjeHRr70G+1V9WQUy6uJbQRmoCZHpOmDFIW2 xjvIXeLYJkJqiUxDx48hkCetKJJL6hHK3RV2SO4hn6N7WiLD6iKqmefUegxJdAqh2Vc6 bTDmNv0ydc2tVbZE+QvEsF9pU06IBw7B4HFLDZnWp0HiOpdW6izv/r4ByjBVisqVcJPX m+GIeCzo3MW9H/pLCyXmVAkx3s7Xaey0OLY8jrla5n84cgAGmiRQVhIIQK9yReWqrh8C 5nqnxWy/lLYmkGemtlN4XViltZJtdDRVZFyaleK4tNHS9k1hgoPwzwWtXtRUIcGoA2B2 I/uQ== X-Gm-Message-State: AOAM530yp6Kf2sYgRAmP+cg21UEjjlKSja3tUO+wvDOMuvYycfE1aRY6 71DHSSFjjG52r6yJJ0n8Xvaf2iXvx2rMKPJya/xdi/Z/MUcZROzGBxJ9ms7ja91zF9atn0GRRm7 fmN+EYJ70HIPqWt/CFQR8Wrs1yAcPluXxpb5EqQ== X-Received: by 2002:a17:906:4a09:b0:6d0:7f19:d738 with SMTP id w9-20020a1709064a0900b006d07f19d738mr12036151eju.76.1645969954374; Sun, 27 Feb 2022 05:52:34 -0800 (PST) X-Google-Smtp-Source: ABdhPJyDrA1IPUhAcFT/Pi1MZ832Wj6CLhe3h27Schy7iuQVqfDwWSjNQI4J+6UflVGRe+cHgFDDSw== X-Received: by 2002:a17:906:4a09:b0:6d0:7f19:d738 with SMTP id w9-20020a1709064a0900b006d07f19d738mr12036129eju.76.1645969954167; Sun, 27 Feb 2022 05:52:34 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id r22-20020a17090638d600b006d584aaa9c9sm3393333ejd.133.2022.02.27.05.52.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Feb 2022 05:52:33 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "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 , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , 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 Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v3 02/11] amba: Use driver_set_override() instead of open-coding Date: Sun, 27 Feb 2022 14:52:05 +0100 Message-Id: <20220227135214.145599-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220227135214.145599-1-krzysztof.kozlowski@canonical.com> References: <20220227135214.145599-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Use a helper for seting driver_override to reduce 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/amba/bus.c | 28 ++++------------------------ include/linux/amba/bus.h | 7 ++++++- 2 files changed, 10 insertions(+), 25 deletions(-) diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index e1a5eca3ae3c..9dffa17f50c0 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -94,31 +94,11 @@ static ssize_t driver_override_store(struct device *_dev, const char *buf, size_t count) { struct amba_device *dev = to_amba_device(_dev); - char *driver_override, *old, *cp; - - /* We need to keep extra room for a newline */ - 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'; - - device_lock(_dev); - old = dev->driver_override; - if (strlen(driver_override)) { - dev->driver_override = driver_override; - } else { - kfree(driver_override); - dev->driver_override = NULL; - } - device_unlock(_dev); + int ret; - kfree(old); + ret = driver_set_override(_dev, &dev->driver_override, buf, count); + if (ret) + return ret; return count; } diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 6c7f47846971..7c703cb7a3cf 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -70,7 +70,12 @@ struct amba_device { unsigned int cid; struct amba_cs_uci_id uci; unsigned int irq[AMBA_NR_IRQS]; - char *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. + */ + const char *driver_override; }; struct amba_driver {