[PATCH] devfreq: correctly check failed allocation

[Insu Yun]

Since devm_kzalloc can be failed in memory pressure,
check return value and handle error.

Signed-off-by: Insu Yun <wuninsu@xxxxxxxxx>
---
 drivers/devfreq/devfreq.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index ca1b362..814089f 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -482,9 +482,23 @@ struct devfreq *devfreq_add_device(struct device *dev,
 						devfreq->profile->max_state *
 						devfreq->profile->max_state,
 						GFP_KERNEL);
+	if (!devfreq->trans_table) {
+		dev_err(dev, "%s: Unable to create transition table for the device\n",
+			__func__);
+		err = -ENOMEM;
+		goto err_dev;
+	}
+
 	devfreq->time_in_state = devm_kzalloc(dev, sizeof(unsigned int) *
 						devfreq->profile->max_state,
 						GFP_KERNEL);
+	if (!devfreq->time_in_state) {
+		dev_err(dev, "%s: Unable to create state for the device\n",
+			__func__);
+		err = -ENOMEM;
+		goto err_dev;
+	}
+
 	devfreq->last_stat_updated = jiffies;
 
 	dev_set_name(&devfreq->dev, "%s", dev_name(dev));
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/