From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Fri, 7 Jul 2017 06:46:30 +0000 (-0500)
Subject: iio: adc: meson-saradc: add NULL check on of_match_device() return value
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2f9aeeed92a2911e8f1ec89cf7f5c16b8d054fe5;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

iio: adc: meson-saradc: add NULL check on of_match_device() return value

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return -ENODEV

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 83da50ed73ab..c4e904bbf168 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -915,6 +915,11 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	init_completion(&priv->done);
 
 	match = of_match_device(meson_sar_adc_of_match, &pdev->dev);
+	if (!match) {
+		dev_err(&pdev->dev, "failed to match device\n");
+		return -ENODEV;
+	}
+
 	priv->data = match->data;
 
 	indio_dev->name = priv->data->name;