diff options
| author | Alexander Clouter <alex@digriz.org.uk> | 2009-02-13 22:01:51 +0300 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2009-02-25 06:47:32 +0300 |
| commit | f407a08bb7eff5ddbe0d9173d8717794a910771f (patch) | |
| tree | e5c4edd6dcbf993c985c9a510127f8bf3cb98f00 /drivers/cpufreq/cpufreq_conservative.c | |
| parent | 11a80a9c7668c40c40a03ae15bd2c6b215058b2e (diff) | |
| download | linux-f407a08bb7eff5ddbe0d9173d8717794a910771f.tar.xz | |
[CPUFREQ] conservative: fix dbs_cpufreq_notifier so freq is not locked
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>
Diffstat (limited to 'drivers/cpufreq/cpufreq_conservative.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_conservative.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index a18cfbf021b3..a16a5b8c1dc5 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -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; } |