[PATCH] cpufreq: exynos5440: protect call to dev_pm_opp_get_opp_count with RCU lock

Dmitry Torokhov
2014-12-16T01:01:07Z

dev_pm_opp_get_opp_count() must be called with RCU lock held.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
---

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