From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Wed, 24 May 2017 09:26:23 +0000 (-0500)
Subject: mfd: wm831x-i2c: Add NULL check before pointer dereference
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=800e54558b0f1444e480ad4eb8d4a774899875d8;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

mfd: wm831x-i2c: Add NULL check before pointer dereference

Add NULL check before dereferencing pointer of_id in order to avoid
a potential NULL pointer dereference.

Addresses-Coverity-ID: 1408829
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c
index 781af060f32d..22f7054d1b28 100644
--- a/drivers/mfd/wm831x-i2c.c
+++ b/drivers/mfd/wm831x-i2c.c
@@ -37,6 +37,10 @@ static int wm831x_i2c_probe(struct i2c_client *i2c,
 
 	if (i2c->dev.of_node) {
 		of_id = of_match_device(wm831x_of_match, &i2c->dev);
+		if (!of_id) {
+			dev_err(&i2c->dev, "Failed to match device\n");
+			return -ENODEV;
+		}
 		type = (enum wm831x_parent)of_id->data;
 	} else {
 		type = (enum wm831x_parent)id->driver_data;