diff options
| -rw-r--r-- | drivers/devfreq/devfreq.c | 30 | ||||
| -rw-r--r-- | include/linux/devfreq.h | 2 |
2 files changed, 23 insertions, 9 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 45e053e5b139..34c00c53611f 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -643,8 +643,8 @@ int devfreq_remove_governor(struct devfreq_governor *governor) g = find_devfreq_governor(governor->name); if (IS_ERR(g)) { pr_err("%s: governor %s not registered\n", __func__, - g->name); - err = -EINVAL; + governor->name); + err = PTR_ERR(g); goto err_out; } list_for_each_entry(devfreq, &devfreq_list, node) { @@ -1023,11 +1023,18 @@ struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, */ int devfreq_register_opp_notifier(struct device *dev, struct devfreq *devfreq) { - struct srcu_notifier_head *nh = opp_get_notifier(dev); + struct srcu_notifier_head *nh; + int ret = 0; + rcu_read_lock(); + nh = opp_get_notifier(dev); if (IS_ERR(nh)) - return PTR_ERR(nh); - return srcu_notifier_chain_register(nh, &devfreq->nb); + ret = PTR_ERR(nh); + rcu_read_unlock(); + if (!ret) + ret = srcu_notifier_chain_register(nh, &devfreq->nb); + + return ret; } /** @@ -1042,11 +1049,18 @@ int devfreq_register_opp_notifier(struct device *dev, struct devfreq *devfreq) */ int devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq) { - struct srcu_notifier_head *nh = opp_get_notifier(dev); + struct srcu_notifier_head *nh; + int ret = 0; + rcu_read_lock(); + nh = opp_get_notifier(dev); if (IS_ERR(nh)) - return PTR_ERR(nh); - return srcu_notifier_chain_unregister(nh, &devfreq->nb); + ret = PTR_ERR(nh); + rcu_read_unlock(); + if (!ret) + ret = srcu_notifier_chain_unregister(nh, &devfreq->nb); + + return ret; } MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 235248cb2c93..e83ef39b3bea 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -192,7 +192,7 @@ extern int devfreq_register_opp_notifier(struct device *dev, extern int devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq); -#ifdef CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND +#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) /** * struct devfreq_simple_ondemand_data - void *data fed to struct devfreq * and devfreq_add_device |