From: Kangjie Lu <kjlu@umn.edu>
Date: Sat, 9 Mar 2019 04:53:55 +0000 (-0600)
Subject: iio: adc: fix a potential NULL pointer dereference
X-Git-Tag: v5.2-rc1~153^2~149^2~85
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=13814627c9658cf8382dd052bc251ee415670a55;p=linux.git

iio: adc: fix a potential NULL pointer dereference

devm_iio_trigger_alloc may fail and return NULL. The fix returns
ENOMEM when it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index c627513d9f0f..5384472b6c4d 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -465,6 +465,8 @@ static int mxs_lradc_adc_trigger_init(struct iio_dev *iio)
 
 	trig = devm_iio_trigger_alloc(&iio->dev, "%s-dev%i", iio->name,
 				      iio->id);
+	if (!trig)
+		return -ENOMEM;
 
 	trig->dev.parent = adc->dev;
 	iio_trigger_set_drvdata(trig, iio);