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| author | Dirk Brandewie <dirk.j.brandewie@intel.com> | 2014-03-19 16:45:53 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-20 03:50:12 +0100 |
| commit | 367dc4aa932bfb33a3189064d33f7890a8ec1ca8 (patch) | |
| tree | fde9bd6004ff7852da144a373dd1c0536521efef /drivers | |
| parent | cpufreq: Remove unnecessary braces (diff) | |
| download | linux-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.tar.xz linux-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.zip | |
cpufreq: Add stop CPU callback to cpufreq_driver interface
This callback allows the driver to do clean up before the CPU is
completely down and its state cannot be modified. This is used
by the intel_pstate driver to reduce the requested P state prior to
the core going away. This is required because the requested P state
of the offline core is used to select the package P state. This
effectively sets the floor package P state to the requested P state on
the offline core.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
[rjw: Minor modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3c56c4759aa1..3aa7a7a226b3 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1337,6 +1337,8 @@ static int __cpufreq_remove_dev_prepare(struct device *dev, pr_debug("%s: policy Kobject moved to cpu: %d from: %d\n", __func__, new_cpu, cpu); } + } else if (cpufreq_driver->stop_cpu && cpufreq_driver->setpolicy) { + cpufreq_driver->stop_cpu(policy); } return 0; |