6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cosmo Chou <chou.cosmo@xxxxxxxxx>
[ Upstream commit 7bbc079531fc38d401e1c4088d4981435a8828e3 ]
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>
Message-ID: <20240819104630.2375441-1-chou.cosmo@xxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/hwmon/pt5161l.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/pt5161l.c b/drivers/hwmon/pt5161l.c
index b0d58a26d499d..a9f0b23f9e76e 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:
@@ -449,7 +449,7 @@ static int pt5161l_read(struct device *dev, enum hwmon_sensor_types type,
adc_code = buf[3] << 24 | buf[2] << 16 | buf[1] << 8 | buf[0];
if (adc_code == 0 || adc_code >= 0x3ff) {
- dev_dbg(dev, "Invalid adc_code %lx\n", adc_code);
+ dev_dbg(dev, "Invalid adc_code %x\n", adc_code);
return -EIO;
}
--
2.43.0
