From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: [PATCH] cpufreq: exynos5440: protect call to dev_pm_opp_get_opp_count with RCU lock Date: Mon, 15 Dec 2014 17:01:07 -0800 Message-ID: <20141216010107.GA16947@dtor-ws> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-pm@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