diff options
| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2013-06-12 15:08:55 +0200 |
|---|---|---|
| committer | Robin Randhawa <robin.randhawa@arm.com> | 2015-04-09 12:25:57 +0100 |
| commit | 94dd7e43fcc7bfbfedcbfeb07556dda25df1c938 (patch) | |
| tree | 6eda3895340ba5dc6d911949df078ed235eddcda /drivers | |
| parent | f7c39d2c55f424d6eabc8c56e6923807283b6a6f (diff) | |
cpuidle: Check if device is already registered
Make __cpuidle_register_device() check whether or not the device has
been registered already and return -EBUSY immediately if that's the
case.
[rjw: Changelog]
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit c878a52d3c7cabab5b24460825c24eafd8be7058)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 5b63185da59b..d75040ddd2b3 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -400,13 +400,16 @@ static int __cpuidle_register_device(struct cpuidle_device *dev) */ int cpuidle_register_device(struct cpuidle_device *dev) { - int ret; + int ret = -EBUSY; if (!dev) return -EINVAL; mutex_lock(&cpuidle_lock); + if (dev->registered) + goto out_unlock; + ret = __cpuidle_device_init(dev); if (ret) goto out_unlock; |