Unverified Commit a548f864 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!6010 PM / devfreq: Synchronize devfreq_monitor_[start/stop 

Merge Pull Request from: @ci-robot 
 
PR sync from: Yi Yang <yiyang13@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/SX6HRLOWWRHEKNGB25QFUKNUTCVDPN3H/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9DNGK 
 
Link:https://gitee.com/openeuler/kernel/pulls/6010

 

Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents cb78e025 104955a0

drivers/devfreq/devfreq.c

+21 −0
Original line number Diff line number Diff line
@@ -381,8 +381,13 @@ static void devfreq_monitor(struct work_struct *work) 
	if (err)

		dev_err(&devfreq->dev, "dvfs failed with (%d) error\n", err);



	if (devfreq->stop_polling)

		goto out;



	queue_delayed_work(devfreq_wq, &devfreq->work,

				msecs_to_jiffies(devfreq->profile->polling_ms));



out:

	mutex_unlock(&devfreq->lock);

}
@@ -397,10 +402,18 @@ static void devfreq_monitor(struct work_struct *work) 
 */

void devfreq_monitor_start(struct devfreq *devfreq)

{

	mutex_lock(&devfreq->lock);

	if (delayed_work_pending(&devfreq->work))

		goto out;



	INIT_DEFERRABLE_WORK(&devfreq->work, devfreq_monitor);

	if (devfreq->profile->polling_ms)

		queue_delayed_work(devfreq_wq, &devfreq->work,

			msecs_to_jiffies(devfreq->profile->polling_ms));



out:

	devfreq->stop_polling = false;

	mutex_unlock(&devfreq->lock);

}

EXPORT_SYMBOL(devfreq_monitor_start);
@@ -414,6 +427,14 @@ EXPORT_SYMBOL(devfreq_monitor_start); 
 */

void devfreq_monitor_stop(struct devfreq *devfreq)

{

	mutex_lock(&devfreq->lock);

	if (devfreq->stop_polling) {

		mutex_unlock(&devfreq->lock);

		return;

	}



	devfreq->stop_polling = true;

	mutex_unlock(&devfreq->lock);

	cancel_delayed_work_sync(&devfreq->work);

}

EXPORT_SYMBOL(devfreq_monitor_stop);