[PATCH 3/9] thermal/drivers/mediatek/lvts: Guard against zero temp_factor in lvts_raw_to_temp
Laura Nao
laura.nao at collabora.com
Mon Jul 21 01:14:53 PDT 2025
Add a guard against zero temp_factor in lvts_raw_to_temp() to prevent
division by zero and ensure safe conversion.
Fixes: 6725a29321e4 ("thermal/drivers/mediatek/lvts_thermal: Make coeff configurable")
Signed-off-by: Laura Nao <laura.nao at collabora.com>
---
drivers/thermal/mediatek/lvts_thermal.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index 8d5259b9d03b..b80c2929ae74 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -280,11 +280,14 @@ static int lvts_raw_to_temp(u32 raw_temp, int temp_factor)
static u32 lvts_temp_to_raw(int temperature, int temp_factor)
{
- u32 raw_temp = ((s64)(golden_temp_offset - temperature)) << 14;
+ u32 raw_temp;
- raw_temp = div_s64(raw_temp, -temp_factor);
+ if (temp_factor == 0)
+ return temperature;
- return raw_temp;
+ raw_temp = ((s64)(golden_temp_offset - temperature)) << 14;
+
+ return div_s64(raw_temp, -temp_factor);
}
static int lvts_get_temp(struct thermal_zone_device *tz, int *temp)
--
2.39.5
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