[PATCH v2 2/4] iio: proximity: hx9023s: Protect against division by zero in set_samp_freq

[Yasin Lee]

Avoid division by zero when sampling frequency is unspecified by
falling back to a default 100ms sampling period.

Fixes: 60df548277b7 ("iio: proximity: Add driver support for TYHX's HX9023S capacitive proximity sensor")
Signed-off-by: Yasin Lee <yasin.lee.x@xxxxxxxxx>
---
 drivers/iio/proximity/hx9023s.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/proximity/hx9023s.c b/drivers/iio/proximity/hx9023s.c
index ad839db6b326..e714fe00a44e 100644
--- a/drivers/iio/proximity/hx9023s.c
+++ b/drivers/iio/proximity/hx9023s.c
@@ -719,7 +719,11 @@ static int hx9023s_set_samp_freq(struct hx9023s_data *data, int val, int val2)
 	struct device *dev = regmap_get_device(data->regmap);
 	unsigned int i, period_ms;
 
-	period_ms = div_u64(NANO, (val * MEGA + val2));
+	if (val || val2)
+		period_ms = div_u64(NANO, (val * MEGA + val2));
+	else
+		/* Fallback to a safe default sampling period */
+		period_ms = 100;
 
 	for (i = 0; i < ARRAY_SIZE(hx9023s_samp_freq_table); i++) {
 		if (period_ms == hx9023s_samp_freq_table[i])

-- 
2.43.0