Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751150AbaLPBBM (ORCPT ); Mon, 15 Dec 2014 20:01:12 -0500 Received: from mail-ig0-f173.google.com ([209.85.213.173]:54191 "EHLO mail-ig0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750745AbaLPBBK (ORCPT ); Mon, 15 Dec 2014 20:01:10 -0500 Date: Mon, 15 Dec 2014 17:01:07 -0800 From: Dmitry Torokhov To: "Rafael J. Wysocki" Cc: Viresh Kumar , Kukjin Kim , Shawn Guo , Wolfram Sang , "Lad, Prabhakar" , Stratos Karafotis , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cpufreq: exynos5440: protect call to dev_pm_opp_get_opp_count with RCU lock Message-ID: <20141216010107.GA16947@dtor-ws> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org dev_pm_opp_get_opp_count() must be called with RCU lock held. Signed-off-by: Dmitry Torokhov --- Again, not tested... drivers/cpufreq/exynos5440-cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c index 21a90ed..588b9ee 100644 --- a/drivers/cpufreq/exynos5440-cpufreq.c +++ b/drivers/cpufreq/exynos5440-cpufreq.c @@ -373,7 +373,11 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) "failed to init cpufreq table: %d\n", ret); goto err_free_opp; } + + rcu_read_lock(); dvfs_info->freq_count = dev_pm_opp_get_opp_count(dvfs_info->dev); + rcu_read_unlock(); + exynos_sort_descend_freq_table(); if (of_property_read_u32(np, "clock-latency", &dvfs_info->latency)) -- 2.2.0.rc0.207.ga3a616c -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/