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authorViresh Kumar <viresh.kumar@linaro.org>2012-12-10 11:20:46 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2013-01-07 09:16:49 +0530
commit1765dc7c08c5cc2fccbdfba8e63492ff4a183a81 (patch)
tree9ce9492037669ff12ef2f46c421aa7c992c6830c
parentd1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff)
downloadvexpress-lsk-1765dc7c08c5cc2fccbdfba8e63492ff4a183a81.tar.gz
cpufreq: Manage only online cpus
cpufreq core doesn't manage offline cpus and if driver->init() has returned mask including offline cpus, it may result in unwanted behavior by cpufreq core or governors. We need to get only online cpus in this mask. There are two places to fix this mask, cpufreq core and cpufreq driver. It makes sense to do this at common place and hence is done in core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
-rw-r--r--drivers/cpufreq/cpufreq.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 1f93dbd7235..de9951766dd 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -970,6 +970,13 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
pr_debug("initialization failed\n");
goto err_unlock_policy;
}
+
+ /*
+ * affected cpus must always be the one, which are online. We aren't
+ * managing offline cpus here.
+ */
+ cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
+
policy->user_policy.min = policy->min;
policy->user_policy.max = policy->max;