If there are no channels defined in the devicetree, there's no point in
probing the device. We were actually requesting a zero sized 'kmalloc'
array but since we were not touching the ZERO_SIZE_PTR afterwards,
nothing bad was actually happening. Hence this is not really a fix but
rather an improvement.
Reviewed-by: Alexandru Ardelean <ardeleanalex@xxxxxxxxx>
Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
---
Nothing changed in v2.
drivers/iio/temperature/ltc2983.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c
index 22e6a26ce6b1..301c3f13fb26 100644
--- a/drivers/iio/temperature/ltc2983.c
+++ b/drivers/iio/temperature/ltc2983.c
@@ -1275,6 +1275,11 @@ static int ltc2983_parse_dt(struct ltc2983_data *st)
&st->filter_notch_freq);
st->num_channels = of_get_available_child_count(dev->of_node);
+ if (!st->num_channels) {
+ dev_err(&st->spi->dev, "At least one channel must be given!");
+ return -EINVAL;
+ }
+
st->sensors = devm_kcalloc(dev, st->num_channels, sizeof(*st->sensors),
GFP_KERNEL);
if (!st->sensors)
--
2.33.0
