On one side we have indio_dev->num_channels includes all physical channels +
timestamp channel. On other side we have an array allocated only for
physical channels. So, fix memory corruption by ARRAY_SIZE() instead of
num_channels variable.
Fixes: 9374e8f5a38d ("iio: adc: add ADC driver for the TI TSC2046 controller")
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
drivers/iio/adc/ti-tsc2046.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/adc/ti-tsc2046.c b/drivers/iio/adc/ti-tsc2046.c
index 91f6bd5effe7..8126084616e6 100644
--- a/drivers/iio/adc/ti-tsc2046.c
+++ b/drivers/iio/adc/ti-tsc2046.c
@@ -395,7 +395,7 @@ static int tsc2046_adc_update_scan_mode(struct iio_dev *indio_dev,
mutex_lock(&priv->slock);
size = 0;
- for_each_set_bit(ch_idx, active_scan_mask, indio_dev->num_channels) {
+ for_each_set_bit(ch_idx, active_scan_mask, ARRAY_SIZE(priv->l)) {
size += tsc2046_adc_group_set_layout(priv, group, ch_idx);
tsc2046_adc_group_set_cmd(priv, group, ch_idx);
group++;
@@ -561,7 +561,7 @@ static int tsc2046_adc_setup_spi_msg(struct tsc2046_adc_priv *priv)
* enabled.
*/
size = 0;
- for (ch_idx = 0; ch_idx < priv->dcfg->num_channels; ch_idx++)
+ for (ch_idx = 0; ch_idx < ARRAY_SIZE(priv->l); ch_idx++)
size += tsc2046_adc_group_set_layout(priv, ch_idx, ch_idx);
priv->tx = devm_kzalloc(&priv->spi->dev, size, GFP_KERNEL);
--
2.30.2
