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cpuidle: Check cpuidle_enable_device() return value

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We previously changed the ordering of the cpuidle framework
initialization so that the governors are registered before the
drivers which can register their devices right from the start.

Now, we can safely remove the __cpuidle_register_device() call hack
in cpuidle_enable_device() and check if the driver has been
registered before enabling it.  Then, cpuidle_register_device() can
consistently check the cpuidle_enable_device() return value when
enabling the device.

[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 15:08:49 +02:00 committed by Rafael J. Wysocki
parent 137b944e10
commit 10b9d3f8a4
1 changed files with 9 additions and 8 deletions
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17
drivers/cpuidle/cpuidle.c
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@ -292,15 +292,12 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
if (!drv || !cpuidle_curr_governor)
return -EIO;
if (!dev->registered)
return -EINVAL;
if (!dev->state_count)
dev->state_count = drv->state_count;
if (dev->registered == 0) {
ret = __cpuidle_register_device(dev);
if (ret)
return ret;
}
poll_idle_init(drv);
ret = cpuidle_add_device_sysfs(dev);
@ -415,13 +412,17 @@ int cpuidle_register_device(struct cpuidle_device *dev)
return ret;
}
cpuidle_enable_device(dev);
ret = cpuidle_enable_device(dev);
if (ret) {
mutex_unlock(&cpuidle_lock);
return ret;
}
cpuidle_install_idle_handler();
mutex_unlock(&cpuidle_lock);
return 0;
}
EXPORT_SYMBOL_GPL(cpuidle_register_device);