diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-21 14:29:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-21 14:29:34 -0700 |
| commit | f78fe0817a20b09d7830ec88869ed83c3d205a40 (patch) | |
| tree | 25ec8bfde0335af4ebbe2ace22c011b4fdc51bb4 | |
| parent | c5edde3a81149d29ceae4221f09f4c7bc2f70846 (diff) | |
| parent | 395da1259ac3e3fdc70636a854c993ddb76c6169 (diff) | |
Merge tag 'pm+acpi-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Two fixes for issues introduced recently, one for an intel_pstate
driver problem uncovered by the recent switch over from using timers
and the other one for a potential cpufreq core problem related to
system suspend/resume.
Specifics:
- Fix an intel_pstate driver problem causing CPUs to get stuck in the
highest P-state when completely idle uncovered by the recent switch
over from using timers (Rafael Wysocki).
- Avoid attempts to get the current CPU frequency when all devices
(like I2C controllers that may be nedded for that purpose) have
been suspended during system suspend/resume (Rafael Wysocki)"
* tag 'pm+acpi-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Abort cpufreq_update_current_freq() for cpufreq_suspended set
intel_pstate: Avoid getting stuck in high P-states when idle
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 3 | ||||
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b87596b591b3..e93405f0eac4 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1491,6 +1491,9 @@ static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy) { unsigned int new_freq; + if (cpufreq_suspended) + return 0; + new_freq = cpufreq_driver->get(policy->cpu); if (!new_freq) return 0; diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 8b5a415ee14a..30fe323c4551 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1130,6 +1130,10 @@ static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu) sample_ratio = div_fp(int_tofp(pid_params.sample_rate_ns), int_tofp(duration_ns)); core_busy = mul_fp(core_busy, sample_ratio); + } else { + sample_ratio = div_fp(100 * cpu->sample.mperf, cpu->sample.tsc); + if (sample_ratio < int_tofp(1)) + core_busy = 0; } cpu->sample.busy_scaled = core_busy; |