Use devfreq_list_lock around list_del() to prevent list corruption.
Signed-off-by: Axel Lin <axel.lin@xxxxxxxxxx>
---
v2: changes base on MyungJoo's comment.
Note, devfreq_list_lock lock region does not to include device_unregister(&devfreq->dev);
drivers/devfreq/devfreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 478006b..66d3c718 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -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);
--
2.7.4
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