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[CPUFREQ] conservative: fix dbs_cpufreq_notifier so freq is not locked

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When someone added the dbs_cpufreq_notifier section to the governor the
code ended up causing the frequency to only fall.  This is because
requested_freq is tinkered with and that should only modified if it has
an invlaid value due to changes in the available frequency ranges

This should fix #10055.

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Alexander Clouter 2009-02-13 19:01:51 +00:00 committed by Dave Jones
parent 11a80a9c76
commit f407a08bb7
1 changed files with 12 additions and 1 deletions
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13
drivers/cpufreq/cpufreq_conservative.c
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@ -137,10 +137,21 @@ dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
struct cpu_dbs_info_s *this_dbs_info = &per_cpu(cpu_dbs_info,
freq->cpu);
struct cpufreq_policy *policy;
if (!this_dbs_info->enable)
return 0;
this_dbs_info->requested_freq = freq->new;
policy = this_dbs_info->cur_policy;
/*
* we only care if our internally tracked freq moves outside
* the 'valid' ranges of freqency available to us otherwise
* we do not change it
*/
if (this_dbs_info->requested_freq > policy->max
|| this_dbs_info->requested_freq < policy->min)
this_dbs_info->requested_freq = freq->new;
return 0;
}