The ad7124-4 and ad7124-8 both support 16 channel registers. Don't
accept more (logical) channels from dt than that.
Fixes: b3af341bbd96 ("iio: adc: Add ad7124 support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxx>
---
drivers/iio/adc/ad7124.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index a5d91933f505..7473bcef7bc6 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -18,6 +18,7 @@
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
+#include <linux/stringify.h>
#include <linux/iio/iio.h>
#include <linux/iio/adc/ad_sigma_delta.h>
@@ -821,6 +822,11 @@ static int ad7124_parse_channel_config(struct iio_dev *indio_dev,
if (!st->num_channels)
return dev_err_probe(dev, -ENODEV, "no channel children\n");
+ if (st->num_channels > AD7124_MAX_CHANNELS) {
+ dev_warn(dev, "Limit number of channels to " __stringify(AD7124_MAX_CHANNELS) "\n");
+ st->num_channels = AD7124_MAX_CHANNELS;
+ }
+
chan = devm_kcalloc(indio_dev->dev.parent, st->num_channels,
sizeof(*chan), GFP_KERNEL);
if (!chan)
--
2.45.2
