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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-25 22:47:07 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-25 22:47:07 +0200
commit45e00374db944b1c12987b501bcaa279b3e36d93 (patch)
tree6866a97ac823d15d211c1d81853c82e58179dcd4
parent96c9ddae034a301bbd32c52da5c972778d73ad2e (diff)
parentc28375583b6471c1cb833a628ab6afb5b69079d0 (diff)
downloadvexpress-lsk-45e00374db944b1c12987b501bcaa279b3e36d93.tar.gz
Merge branch 'pm-fixes'
* pm-fixes: cpufreq: fix NULL pointer deference at od_set_powersave_bias()
-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 4b9bb5def6f..93eb5cbcc1f 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -47,6 +47,8 @@ static struct od_ops od_ops;
static struct cpufreq_governor cpufreq_gov_ondemand;
#endif
+static unsigned int default_powersave_bias;
+
static void ondemand_powersave_bias_init_cpu(int cpu)
{
struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info, cpu);
@@ -543,7 +545,7 @@ static int od_init(struct dbs_data *dbs_data)
tuners->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR;
tuners->ignore_nice = 0;
- tuners->powersave_bias = 0;
+ tuners->powersave_bias = default_powersave_bias;
tuners->io_is_busy = should_io_be_busy();
dbs_data->tuners = tuners;
@@ -585,6 +587,7 @@ static void od_set_powersave_bias(unsigned int powersave_bias)
unsigned int cpu;
cpumask_t done;
+ default_powersave_bias = powersave_bias;
cpumask_clear(&done);
get_online_cpus();
@@ -593,11 +596,17 @@ static void od_set_powersave_bias(unsigned int powersave_bias)
continue;
policy = per_cpu(od_cpu_dbs_info, cpu).cdbs.cur_policy;
- dbs_data = policy->governor_data;
- od_tuners = dbs_data->tuners;
- od_tuners->powersave_bias = powersave_bias;
+ if (!policy)
+ continue;
cpumask_or(&done, &done, policy->cpus);
+
+ if (policy->governor != &cpufreq_gov_ondemand)
+ continue;
+
+ dbs_data = policy->governor_data;
+ od_tuners = dbs_data->tuners;
+ od_tuners->powersave_bias = default_powersave_bias;
}
put_online_cpus();
}