[PATCH] cpufreq: exynos5440: protect call to dev_pm_opp_get_opp_count with RCU lock
DORMANTno replies
From: Dmitry Torokhov <hidden>
Date: 2014-12-16 01:01:12
Also in:
linux-arm-kernel, linux-samsung-soc, lkml
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
dev_pm_opp_get_opp_count() must be called with RCU lock held. Signed-off-by: Dmitry Torokhov <redacted> --- 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