[PATCH] hwmon: (pt5161l) Fix invalid temperature reading

[Cosmo Chou]

The temperature reading function was using a signed long for the ADC
code, which could lead to mishandling of invalid codes on 32-bit
platforms. This allowed out-of-range ADC codes to be incorrectly
interpreted as valid values and used in temperature calculations.

Change adc_code to u32 to ensure that invalid ADC codes are correctly
identified on all platforms.

Fixes: 1b2ca93cd059 ("hwmon: Add driver for Astera Labs PT5161L retimer")
Signed-off-by: Cosmo Chou <chou.cosmo@xxxxxxxxx>
---
 drivers/hwmon/pt5161l.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/pt5161l.c b/drivers/hwmon/pt5161l.c
index b0d58a26d499..46dd5c1723cf 100644
--- a/drivers/hwmon/pt5161l.c
+++ b/drivers/hwmon/pt5161l.c
@@ -427,7 +427,7 @@ static int pt5161l_read(struct device *dev, enum hwmon_sensor_types type,
 	struct pt5161l_data *data = dev_get_drvdata(dev);
 	int ret;
 	u8 buf[8];
-	long adc_code;
+	u32 adc_code;
 
 	switch (attr) {
 	case hwmon_temp_input:
-- 
2.34.1