linux-kernel - [PATCH -next 2/3] cpufreq: conservative: Break out earlier on the lowest frequency

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Date:	Thu, 28 Feb 2013 14:38:01 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>, cpufreq@...r.kernel.org,
	linux-pm@...r.kernel.org, Namhyung Kim <namhyung.kim@....com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH -next 2/3] cpufreq: conservative: Break out earlier on the lowest frequency

From: Namhyung Kim <namhyung.kim@....com>

If we're on the lowest frequency, no need to calculate new freq.
Break out even earlier in this case.

Cc: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 drivers/cpufreq/cpufreq_conservative.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 4fd0006b1291..dd2fd9094819 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -93,18 +93,18 @@ static void cs_check_cpu(int cpu, unsigned int load)
 	 * safe, we focus 10 points under the threshold.
 	 */
 	if (load < (cs_tuners.down_threshold - 10)) {
-		freq_target = (cs_tuners.freq_step * policy->max) / 100;
-
-		dbs_info->requested_freq -= freq_target;
-		if (dbs_info->requested_freq < policy->min)
-			dbs_info->requested_freq = policy->min;
-
 		/*
 		 * if we cannot reduce the frequency anymore, break out early
 		 */
 		if (policy->cur == policy->min)
 			return;
 
+		freq_target = (cs_tuners.freq_step * policy->max) / 100;
+
+		dbs_info->requested_freq -= freq_target;
+		if (dbs_info->requested_freq < policy->min)
+			dbs_info->requested_freq = policy->min;
+
 		__cpufreq_driver_target(policy, dbs_info->requested_freq,
 				CPUFREQ_RELATION_H);
 		return;
-- 
1.7.11.7

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