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

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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>
This commit is contained in:
Gustavo A. R. Silva 2017-07-07 01:46:30 -05:00 committed by Jonathan Cameron
parent 0503deb820
commit 2f9aeeed92
1 changed files with 5 additions and 0 deletions
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5
drivers/iio/adc/meson_saradc.c
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@ -915,6 +915,11 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
init_completion(&priv->done); init_completion(&priv->done);
match = of_match_device(meson_sar_adc_of_match, &pdev->dev); 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; priv->data = match->data;
indio_dev->name = priv->data->name; indio_dev->name = priv->data->name;