Check that the sw_mode_config function pointer is not NULL before
calling it. Not all buses define this callback, which resulted in a NULL
pointer dereference.
Fixes: e571c1902116 ("iio: adc: ad7606: move scale_setup as function pointer on chip-info")
Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
drivers/iio/adc/ad7606.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 631e837171679ad95e71cef2ce6c55c2c756881a..ec444aba25e89ced7b84b723aded3c9dbf2c738b 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -1236,9 +1236,11 @@ static int ad7616_sw_mode_setup(struct iio_dev *indio_dev)
st->write_scale = ad7616_write_scale_sw;
st->write_os = &ad7616_write_os_sw;
- ret = st->bops->sw_mode_config(indio_dev);
- if (ret)
- return ret;
+ if (st->bops->sw_mode_config) {
+ ret = st->bops->sw_mode_config(indio_dev);
+ if (ret)
+ return ret;
+ }
/* Activate Burst mode and SEQEN MODE */
return ad7606_write_mask(st, AD7616_CONFIGURATION_REGISTER,
@@ -1268,6 +1270,9 @@ static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev)
st->write_scale = ad7606_write_scale_sw;
st->write_os = &ad7606_write_os_sw;
+ if (!st->bops->sw_mode_config)
+ return 0;
+
return st->bops->sw_mode_config(indio_dev);
}
--
2.43.0
