diff mbox

[V2,11/14] cpufreq: stats: don't update stats on false notifiers

Message ID bc9a1be9bacfe155f89989404b6eba916286b4c5.1420177186.git.viresh.kumar@linaro.org
State New
Headers show

Commit Message

Viresh Kumar Jan. 2, 2015, 5:46 a.m. UTC 
No idea when 'old_index == new_index' in transition notifier (probably never?),
but if this happens, we aren't supposed to update time_in_state by calling
cpufreq_stats_update(). Its only relevant when we are changing frequencies.

So, move the call after matching indexes.

Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/cpufreq_stats.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index c0c2ddece8fe..7701532b32c8 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -293,11 +293,11 @@  static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
 	if (old_index == -1 || new_index == -1)
 		return 0;
 
-	cpufreq_stats_update(stat);
-
 	if (old_index == new_index)
 		return 0;
 
+	cpufreq_stats_update(stat);
+
 	spin_lock(&cpufreq_stats_lock);
 	stat->last_index = new_index;
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS