iio: adc: ad7192: reject devices without match data

SPI driver_override allows a device to bind to this driver without
matching either the OF or SPI device ID table. In that case,
spi_get_device_match_data() returns NULL.

ad7192_probe() immediately dereferences the returned chip information
to initialize the IIO device, causing a NULL pointer dereference.

Commit 572a00852635 ("iio: dac: ad5686: missing NULL check on match
data") fixed the same driver_override issue in another SPI driver.
Reject devices without match data before using the chip information.

Fixes: c3708c829a06 ("iio: adc: ad7192: Convert from of specific to fwnode property handling")
Cc: stable@vger.kernel.org
Signed-off-by: Jiale Yao <yaojiale02@163.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions