From patchwork Wed Feb 23 19:13:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12757386 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 BB4ABC433F5 for ; Wed, 23 Feb 2022 19:14:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244260AbiBWTPA (ORCPT ); Wed, 23 Feb 2022 14:15:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244232AbiBWTO6 (ORCPT ); Wed, 23 Feb 2022 14:14:58 -0500 Received: from smtp-relay-internal-1.canonical.com (smtp-relay-internal-1.canonical.com [185.125.188.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CBDE403CC for ; Wed, 23 Feb 2022 11:14:29 -0800 (PST) Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) (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-1.canonical.com (Postfix) with ESMTPS id 5EF2140313 for ; Wed, 23 Feb 2022 19:14:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643665; bh=6kmYalWKPfFv5VRw+oGSxmK6RPimpkHdVtl6uKB49Rw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=lypfQ5EHzpPmMptBnb1UN2iDFehpADD2VaDxcZwFK3pUxK58kF5AOQV48s64IfLTr Vqhh3CRJ+x2XxCGdvUTryHx68LR1CYFIl7nFH7uLw4C5/JplFp6fPsVYqSOZy9yk1I WEDg5qj5nxzd/uUGk0dXdLCbFc8azwjZc6ZtJKqAg9h8sKbIekQyfcRMElOwwp5X78 96Bf7WiFsP0OHi+sWOgnbgqljfBGuUt3Y5ZDjOjpnis9IgvSt0Igr6Ni2Z+HksoQQ4 f+PVM6Dn2KeDR2gp8YLzRhS/gGzj9bgI3cJr0VUtTt7XSytE/5aQwDRvw6tNjFRmL8 +G1t7eZX4F5KQ== Received: by mail-ed1-f69.google.com with SMTP id j10-20020a05640211ca00b004090fd8a936so14063703edw.23 for ; Wed, 23 Feb 2022 11:14:25 -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=6kmYalWKPfFv5VRw+oGSxmK6RPimpkHdVtl6uKB49Rw=; b=jF/Frl3HpjiPorOvZrN9xMUSbpLreSqDeURLbMyZjHW9HWC4OQnc66GK5EC29kcsgF iD2X4TIpLXc8qoyx3Ad44/Ia7rYEoNZcYXYUXTQAuTM/4KJOugIAjOv9ApRxNNmDDWZp nk+JegoJmtb12xXn9x9TznJ3LxD02BRnRch3Q9nYsHjN1OtlByS7yEJvlnZba1JmThjA ZzlCJK2Do5CroODg5MkdU5DOeDDNDjzL5fCEIM9CTxTFDKWfo468JA0Hb6sMOz3hpi9h 48kqGgEM0muUzGCcyxaV8eKooH7aSKHBU3pwUc9NRwWhlK0WTqf4G90oF5Fh/GrsLBQm LLOA== X-Gm-Message-State: AOAM533xTJKV5mLd+Tvtmrh+FK0R4YZT7VQdot4bSJMOfjgRqImOQo8T B2sKu2CrpmcUQZC9bMCU4MczsbTE9st0i22n0P62KYSQoQShYt34ThlxG4Ceoe0ukpqLyMyIJfV PVcSwdO9AxYzEyocAaaoZ+AANfwYq329KecJ08Se9ZnA= X-Received: by 2002:a17:906:8517:b0:6d0:1de8:cb6e with SMTP id i23-20020a170906851700b006d01de8cb6emr879357ejx.686.1645643637566; Wed, 23 Feb 2022 11:13:57 -0800 (PST) X-Google-Smtp-Source: ABdhPJxB+J8rGAXqipxoP9wQ6myB7nB+zWmd6qpvw2I7Sb7Voa93sYSAIKWPaoRnjyaDxxppMxF7NQ== X-Received: by 2002:a17:906:8517:b0:6d0:1de8:cb6e with SMTP id i23-20020a170906851700b006d01de8cb6emr879348ejx.686.1645643637394; Wed, 23 Feb 2022 11:13:57 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:56 -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 v2 04/11] hv: vmbus: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:03 +0100 Message-Id: <20220223191310.347669-5-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/hv/vmbus_drv.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 12a2b37e87f3..f2435cc8b680 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -575,31 +575,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct hv_device *hv_dev = device_to_hv_device(dev); - char *driver_override, *old, *cp; + int ret; /* 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 = hv_dev->driver_override; - if (strlen(driver_override)) { - hv_dev->driver_override = driver_override; - } else { - kfree(driver_override); - hv_dev->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &hv_dev->driver_override, buf); + if (ret) + return ret; return count; }