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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-07-25 14:28:01 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-07-25 14:28:01 +0300 |
| commit | 6e926363fc0071e6dc33349dedd97f28e9a2e464 (patch) | |
| tree | 10adbe3f94b1f32a37095b63b03c443cc685816a /drivers/cpufreq/pcc-cpufreq.c | |
| parent | 95d6c0857e54b788982746071130d822a795026b (diff) | |
| parent | eea033d07543a177fc2ab35a6d633b2aa9684b0f (diff) | |
| download | linux-6e926363fc0071e6dc33349dedd97f28e9a2e464.tar.xz | |
Merge back cpufreq material for 4.19.
Diffstat (limited to 'drivers/cpufreq/pcc-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/pcc-cpufreq.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index 0c56c9759672..099a849396f6 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -593,6 +593,15 @@ static int __init pcc_cpufreq_init(void) return ret; } + if (num_present_cpus() > 4) { + pcc_cpufreq_driver.flags |= CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING; + pr_err("%s: Too many CPUs, dynamic performance scaling disabled\n", + __func__); + pr_err("%s: Try to enable another scaling driver through BIOS settings\n", + __func__); + pr_err("%s: and complain to the system vendor\n", __func__); + } + ret = cpufreq_register_driver(&pcc_cpufreq_driver); return ret; |