cpufreq: conservative: Break out earlier on the lowest frequency

If we're on the lowest frequency, no need to calculate new freq.
Break out even earlier in this case.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq_conservative.c

@@ -87,18 +87,18 @@ 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;