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| author | Yangtao Li <tiny.windzz@gmail.com> | 2019-01-19 11:04:53 -0500 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2019-04-16 09:29:18 +0900 |
| commit | 25846fa1cedada274b65ffd2413378290a60be47 (patch) | |
| tree | b51c50d3889bb3599dca01d2bd318a82767f6840 /drivers/devfreq | |
| parent | a9487917ba6728dd618ae6d418a7f2197f1b4592 (diff) | |
| download | lwn-25846fa1cedada274b65ffd2413378290a60be47.tar.gz lwn-25846fa1cedada274b65ffd2413378290a60be47.zip | |
PM / devfreq: fix missing check of return value in devfreq_add_device()
devm_kzalloc() could fail, so insert a check of its return value. And
if it fails, returns -ENOMEM.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/devfreq.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index fa1bdde89ffc..4af608a61cd9 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -689,10 +689,22 @@ struct devfreq *devfreq_add_device(struct device *dev, devfreq->profile->max_state, devfreq->profile->max_state), GFP_KERNEL); + if (!devfreq->trans_table) { + mutex_unlock(&devfreq->lock); + err = -ENOMEM; + goto err_devfreq; + } + devfreq->time_in_state = devm_kcalloc(&devfreq->dev, devfreq->profile->max_state, sizeof(unsigned long), GFP_KERNEL); + if (!devfreq->time_in_state) { + mutex_unlock(&devfreq->lock); + err = -ENOMEM; + goto err_devfreq; + } + devfreq->last_stat_updated = jiffies; srcu_init_notifier_head(&devfreq->transition_notifier_list); @@ -726,7 +738,7 @@ struct devfreq *devfreq_add_device(struct device *dev, err_init: mutex_unlock(&devfreq_list_lock); - +err_devfreq: devfreq_remove_device(devfreq); devfreq = NULL; err_dev: |