[PATCH 5/7] iio: imu: adis16400: validate SPI match data

[Jiale Yao]

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 adis16400_probe() immediately dereferences the result.

Validate the match data before it is used.

Fixes: 2ef920e0e5c0 ("iio: imu: adis16400: Use separate structures rather than an array for chip info")
Signed-off-by: Jiale Yao <yaojiale02@xxxxxxx>
---
 drivers/iio/imu/adis16400.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/imu/adis16400.c b/drivers/iio/imu/adis16400.c
index 4842346f9f0c..28ad2d62d984 100644
--- a/drivers/iio/imu/adis16400.c
+++ b/drivers/iio/imu/adis16400.c
@@ -1150,6 +1150,9 @@ static int adis16400_probe(struct spi_device *spi)
 
 	/* setup the industrialio driver allocated elements */
 	st->variant = spi_get_device_match_data(spi);
+	if (!st->variant)
+		return -ENODATA;
+
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->channels = st->variant->channels;
 	indio_dev->num_channels = st->variant->num_channels;
-- 
2.34.1