[PATCH v2] iio: adc: ti-ads1018: fix type overflow for data rate

[Chunyang Chen]

The variable 'drate' is currently defined as u8. However, the data rate
values in ads1018 can reach up to 3300 Hz, which exceeds the maximum
value of 255 that a u8 can hold.

Change the type of 'drate' to u32 to match the data_rate_mode_to_hz
array definition and ensure the data rate is handled correctly.

Fixes: bf0bba486b5b ("iio: adc: ti-ads1018: add ti-ads1018 driver")
Signed-off-by: Chunyang Chen <chenchunyang0908@xxxxxxxxx>

---
v2:
- Change drate type to u32 as suggested by Kurt.
- Add Fixes tag as requested by Andy.
---
 drivers/iio/adc/ti-ads1018.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-ads1018.c b/drivers/iio/adc/ti-ads1018.c
index 6246b3cab..0780abd0d 100644
--- a/drivers/iio/adc/ti-ads1018.c
+++ b/drivers/iio/adc/ti-ads1018.c
@@ -249,7 +249,7 @@ static int ads1018_single_shot(struct ads1018 *ads1018,
 			       struct iio_chan_spec const *chan, u16 *cnv)
 {
 	u8 max_drate_mode = ads1018->chip_info->num_data_rate_mode_to_hz - 1;
-	u8 drate = ads1018->chip_info->data_rate_mode_to_hz[max_drate_mode];
+	u32 drate = ads1018->chip_info->data_rate_mode_to_hz[max_drate_mode];
 	u8 pga_mode = ads1018->chan_data[chan->scan_index].pga_mode;
 	struct spi_transfer xfer[2] = {
 		{
-- 
2.34.1