From: Dominik Brodowski <linux@dominikbrodowski.net>
Date: Sun, 26 Mar 2006 09:11:03 +0000 (+0200)
Subject: [PATCH] cpufreq_ondemand: add range check
X-Git-Tag: v2.6.17-rc1~207^2~3^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c9d8c0e84d395a01289ebd1597758939a875a86;p=linux-2.6

[PATCH] cpufreq_ondemand: add range check

Assert that cpufreq_target is, at least, called with the minimum frequency
allowed by this policy, not something lower. It triggered problems on ARM.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index cd846f5714..956d121cb1 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -351,6 +351,9 @@ static void dbs_check_cpu(int cpu)
 	freq_next = (freq_next * policy->cur) /
 			(dbs_tuners_ins.up_threshold - 10);
 
+	if (freq_next < policy->min)
+		freq_next = policy->min;
+
 	if (freq_next <= ((policy->cur * 95) / 100))
 		__cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L);
 }