[PATCH 4/7] iio: frequency: adf4377: reject devices without match data

[Jiale Yao <yaojiale02@163.com>]

A device bound through driver_override need not match an entry in the
driver tables. In that case spi_get_device_match_data() returns NULL,
but the result is later dereferenced by the property parsing and
initialization paths.

Reject devices without match data before continuing probe.

Fixes: 6140a92cd086 ("iio: frequency: adf4377: add adf4378 support")
Signed-off-by: Jiale Yao <yaojiale02@163.com>
---
 drivers/iio/frequency/adf4377.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
index 4dd19a9aa994..d1e5bb062474 100644
--- a/drivers/iio/frequency/adf4377.c
+++ b/drivers/iio/frequency/adf4377.c
@@ -1060,6 +1060,9 @@ static int adf4377_probe(struct spi_device *spi)
 	st->regmap = regmap;
 	st->spi = spi;
 	st->chip_info = spi_get_device_match_data(spi);
+	if (!st->chip_info)
+		return -ENODATA;
+
 	mutex_init(&st->lock);
 
 	ret = adf4377_properties_parse(st);
-- 
2.34.1