[PATCH 3/9] thermal/drivers/mediatek/lvts: Guard against zero temp_factor in lvts_raw_to_temp
From: Laura Nao <hidden>
Date: 2025-07-21 08:16:21
Also in:
linux-devicetree, linux-mediatek, linux-pm, lkml
Subsystem:
the rest, thermal · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
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 <redacted>
---
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