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cpuidle: Introduce __cpuidle_device_init()

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Add __cpuidle_device_init() for initializing the cpuidle_device
structure.

[rjw: Changelog]
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Daniel Lezcano 2013-06-12 15:08:54 +02:00 • committed by Rafael J. Wysocki
commit 5df0aa7341
1 changed files with 13 additions and 7 deletions
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20
drivers/cpuidle/cpuidle.c
View file

@ -276,7 +276,7 @@ static void poll_idle_init(struct cpuidle_driver *drv) {}
*/
int cpuidle_enable_device(struct cpuidle_device *dev)
{
int ret, i;
int ret;
struct cpuidle_driver *drv;
if (!dev)
@ -306,12 +306,6 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
(ret = cpuidle_curr_governor->enable(drv, dev)))
goto fail_sysfs;
for (i = 0; i < dev->state_count; i++) {
dev->states_usage[i].usage = 0;
dev->states_usage[i].time = 0;
}
dev->last_residency = 0;
smp_wmb();
dev->enabled = 1;
@ -364,6 +358,14 @@ static void __cpuidle_unregister_device(struct cpuidle_device *dev)
module_put(drv->owner);
}
static int __cpuidle_device_init(struct cpuidle_device *dev)
{
memset(dev->states_usage, 0, sizeof(dev->states_usage));
dev->last_residency = 0;
return 0;
}
/**
* __cpuidle_register_device - internal register function called before register
* and enable routines
@ -405,6 +407,10 @@ int cpuidle_register_device(struct cpuidle_device *dev)
mutex_lock(&cpuidle_lock);
ret = __cpuidle_device_init(dev);
if (ret)
goto out_unlock;
ret = __cpuidle_register_device(dev);
if (ret)
goto out_unlock;