[PATCH] cpufreq_ondemand: Warn if it cannot run due to too long transition latency

Display a warning if the ondemand governor can not be selected due to a
transition latency of the cpufreq driver which is too long.
Signed-off-by: NEric Piel <eric.piel@tremplin-utc.net>
Acked-by: NVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: NDominik Brodowski <linux@dominikbrodowski.net>

drivers/cpufreq/cpufreq_ondemand.c

@@ -395,8 +395,11 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
 			return -EINVAL;
 
 		if (policy->cpuinfo.transition_latency >
-				(TRANSITION_LATENCY_LIMIT * 1000))
+				(TRANSITION_LATENCY_LIMIT * 1000)) {
+			printk(KERN_WARNING "ondemand governor failed to load "
+			       "due to too long transition latency\n");
 			return -EINVAL;
+		}
 		if (this_dbs_info->enable) /* Already enabled */
 			break;