From patchwork Sun Jan 17 14:26:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 365837 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 56950C433E0 for ; Sun, 17 Jan 2021 14:28:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 13F9320780 for ; Sun, 17 Jan 2021 14:28:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728676AbhAQO2V (ORCPT ); Sun, 17 Jan 2021 09:28:21 -0500 Received: from smtp08.smtpout.orange.fr ([80.12.242.130]:57927 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728538AbhAQO2U (ORCPT ); Sun, 17 Jan 2021 09:28:20 -0500 Received: from localhost.localdomain ([92.131.99.25]) by mwinf5d43 with ME id HqSa2400C0Ys01Y03qSbg7; Sun, 17 Jan 2021 15:26:36 +0100 X-ME-Helo: localhost.localdomain X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sun, 17 Jan 2021 15:26:36 +0100 X-ME-IP: 92.131.99.25 From: Christophe JAILLET To: mmayer@broadcom.com, bcm-kernel-feedback-list@broadcom.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, f.fainelli@gmail.com Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH v2 1/2] cpufreq: brcmstb-avs-cpufreq: Fix some resource leaks in the error handling path of the probe function Date: Sun, 17 Jan 2021 15:26:35 +0100 Message-Id: <20210117142635.568686-1-christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org If 'cpufreq_register_driver()' fails, we must release the resources allocated in 'brcm_avs_prepare_init()' as already done in the remove function. To do that, introduce a new function 'brcm_avs_prepare_uninit()' in order to avoid code duplication. This also makes the code more readable (IMHO). Fixes: de322e085995 ("cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs") Signed-off-by: Christophe JAILLET --- v1->v2: be less verbose when writing the error handling path of the probe --- drivers/cpufreq/brcmstb-avs-cpufreq.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c index 3e31e5d28b79..e25ccb744187 100644 --- a/drivers/cpufreq/brcmstb-avs-cpufreq.c +++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c @@ -597,6 +597,16 @@ static int brcm_avs_prepare_init(struct platform_device *pdev) return ret; } +static void brcm_avs_prepare_uninit(struct platform_device *pdev) +{ + struct private_data *priv; + + priv = platform_get_drvdata(pdev); + + iounmap(priv->avs_intr_base); + iounmap(priv->base); +} + static int brcm_avs_cpufreq_init(struct cpufreq_policy *policy) { struct cpufreq_frequency_table *freq_table; @@ -732,21 +742,22 @@ static int brcm_avs_cpufreq_probe(struct platform_device *pdev) brcm_avs_driver.driver_data = pdev; - return cpufreq_register_driver(&brcm_avs_driver); + ret = cpufreq_register_driver(&brcm_avs_driver); + if (ret) + brcm_avs_prepare_uninit(pdev); + + return ret; } static int brcm_avs_cpufreq_remove(struct platform_device *pdev) { - struct private_data *priv; int ret; ret = cpufreq_unregister_driver(&brcm_avs_driver); if (ret) return ret; - priv = platform_get_drvdata(pdev); - iounmap(priv->base); - iounmap(priv->avs_intr_base); + brcm_avs_prepare_uninit(pdev); return 0; } From patchwork Sun Jan 17 14:26:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 365353 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 691E6C433DB for ; Sun, 17 Jan 2021 14:28:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40B1A207AE for ; Sun, 17 Jan 2021 14:28:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729223AbhAQO23 (ORCPT ); Sun, 17 Jan 2021 09:28:29 -0500 Received: from smtp08.smtpout.orange.fr ([80.12.242.130]:25832 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728549AbhAQO21 (ORCPT ); Sun, 17 Jan 2021 09:28:27 -0500 Received: from localhost.localdomain ([92.131.99.25]) by mwinf5d43 with ME id HqSj240080Ys01Y03qSjgn; Sun, 17 Jan 2021 15:26:43 +0100 X-ME-Helo: localhost.localdomain X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sun, 17 Jan 2021 15:26:43 +0100 X-ME-IP: 92.131.99.25 From: Christophe JAILLET To: mmayer@broadcom.com, bcm-kernel-feedback-list@broadcom.com, rjw@rjwysocki.net, viresh.kumar@linaro.org, f.fainelli@gmail.com Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH v2 2/2] cpufreq: brcmstb-avs-cpufreq: Fix some resource leaks in the remove function Date: Sun, 17 Jan 2021 15:26:44 +0100 Message-Id: <20210117142644.568738-1-christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org If 'cpufreq_unregister_driver()' fails, just WARN and continue, so that other resources are freed. Fixes: de322e085995 ("cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs") Signed-off-by: Christophe JAILLET --- v1->v2: New patch --- drivers/cpufreq/brcmstb-avs-cpufreq.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c index e25ccb744187..4153150e20db 100644 --- a/drivers/cpufreq/brcmstb-avs-cpufreq.c +++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c @@ -754,8 +754,7 @@ static int brcm_avs_cpufreq_remove(struct platform_device *pdev) int ret; ret = cpufreq_unregister_driver(&brcm_avs_driver); - if (ret) - return ret; + WARN_ON(ret); brcm_avs_prepare_uninit(pdev);