diff options
| author | Srivatsa S. Bhat | 2013-07-30 00:55:25 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki | 2013-08-07 23:02:49 +0200 |
| commit | 5302c3fb2e62f4ca5e43e060491ba299f58c5231 (patch) | |
| tree | e76c3698959994ac9587a9ef063361cf91577cf5 /drivers/cpufreq/cpufreq.c | |
| parent | cpufreq: Preserve policy structure across suspend/resume (diff) | |
| download | kernel-qcow2-linux-5302c3fb2e62f4ca5e43e060491ba299f58c5231.tar.gz kernel-qcow2-linux-5302c3fb2e62f4ca5e43e060491ba299f58c5231.tar.xz kernel-qcow2-linux-5302c3fb2e62f4ca5e43e060491ba299f58c5231.zip | |
cpufreq: Perform light-weight init/teardown during suspend/resume
Now that we have the infrastructure to perform a light-weight init/tear-down,
use that in the cpufreq CPU hotplug notifier when invoked from the
suspend/resume path.
This also ensures that the file permissions of the cpufreq sysfs files are
preserved across suspend/resume, something which commit a66b2e (cpufreq:
Preserve sysfs files across suspend/resume) originally intended to do, but
had to be reverted due to other problems.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index e0ace3d9382c..370abb66babc 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2040,22 +2040,26 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb, { unsigned int cpu = (unsigned long)hcpu; struct device *dev; + bool frozen = false; dev = get_cpu_device(cpu); if (dev) { - switch (action) { + + if (action & CPU_TASKS_FROZEN) + frozen = true; + + switch (action & ~CPU_TASKS_FROZEN) { case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - cpufreq_add_dev(dev, NULL); + __cpufreq_add_dev(dev, NULL, frozen); cpufreq_update_policy(cpu); break; + case CPU_DOWN_PREPARE: - case CPU_DOWN_PREPARE_FROZEN: - __cpufreq_remove_dev(dev, NULL, false); + __cpufreq_remove_dev(dev, NULL, frozen); break; + case CPU_DOWN_FAILED: - case CPU_DOWN_FAILED_FROZEN: - cpufreq_add_dev(dev, NULL); + __cpufreq_add_dev(dev, NULL, frozen); break; } } |