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Commit 0f376c9c authored by Axel Lin's avatar Axel Lin Committed by Rafael J. Wysocki
Browse files

PM / devfreq: Add proper locking around list_del() 



Use devfreq_list_lock around list_del() to prevent list corruption.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Acked-by: default avatarMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 3b91f4b3

drivers/devfreq/devfreq.c

+3 −1
Original line number Diff line number Diff line
@@ -594,17 +594,19 @@ struct devfreq *devfreq_add_device(struct device *dev, 
	if (devfreq->governor)

		err = devfreq->governor->event_handler(devfreq,

					DEVFREQ_GOV_START, NULL);

	mutex_unlock(&devfreq_list_lock);

	if (err) {

		dev_err(dev, "%s: Unable to start governor for the device\n",

			__func__);

		goto err_init;

	}

	mutex_unlock(&devfreq_list_lock);



	return devfreq;



err_init:

	list_del(&devfreq->node);

	mutex_unlock(&devfreq_list_lock);



	device_unregister(&devfreq->dev);

err_out:

	return ERR_PTR(err);