From 367dc4aa932bfb33a3189064d33f7890a8ec1ca8 Mon Sep 17 00:00:00 2001 From: Dirk Brandewie Date: Wed, 19 Mar 2014 08:45:53 -0700 Subject: 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 [rjw: Minor modifications] Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/cpufreq.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/cpufreq/cpufreq.c') 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; -- cgit v1.2.2