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Date: Mon, 15 Dec 2014 16:50:48 -0800 From: Dmitry Torokhov <dtor@...omium.org> To: "Rafael J. Wysocki" <rjw@...ysocki.net> Cc: Viresh Kumar <viresh.kumar@...aro.org>, Shawn Guo <shawn.guo@...escale.com>, Philipp Zabel <p.zabel@...gutronix.de>, Anson Huang <b20788@...escale.com>, John Tobias <john.tobias.ph@...il.com>, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] cpufreq: imx6: prorect calls to dev_pm_opp_get_opp_count with RCU lock dev_pm_opp_get_opp_count() must be called with RCU lock held. Signed-off-by: Dmitry Torokhov <dtor@...omium.org> --- Not tested at all... drivers/cpufreq/imx6q-cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index 380a90d..851d4fd 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -200,7 +200,9 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) * Just, incase the platform did not supply the OPP * table, it will try to get it. */ + rcu_read_lock(); num = dev_pm_opp_get_opp_count(cpu_dev); + rcu_read_unlock(); if (num < 0) { ret = of_init_opp_table(cpu_dev); if (ret < 0) { @@ -211,7 +213,9 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) /* Because we have added the OPPs here, we must free them */ free_opp = true; + rcu_read_lock(); num = dev_pm_opp_get_opp_count(cpu_dev); + rcu_read_unlock(); if (num < 0) { ret = num; dev_err(cpu_dev, "no OPP table is found: %d\n", ret); -- 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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