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authorDirk Brandewie <dirk.j.brandewie@intel.com>2014-03-19 19:45:53 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-03-20 06:50:12 +0400
commit367dc4aa932bfb33a3189064d33f7890a8ec1ca8 (patch)
treefde9bd6004ff7852da144a373dd1c0536521efef /drivers/cpufreq
parentbda9f552f9826313ef8a477fc8e4891de9ae5e73 (diff)
downloadlinux-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.tar.xz
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/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq.c2
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;