This is a note to let you know that I've just added the patch titled
hwmon: (tps23861) Fix reporting of negative temperatures
to the 6.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hwmon-tps23861-fix-reporting-of-negative-temperature.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 88f2852bc6fd482d4b33a9617eb9e4e732d4ccf0
Author: Murad Masimov <m.masimov@xxxxxxxxx>
Date: Thu Nov 21 20:36:03 2024 +0300
hwmon: (tps23861) Fix reporting of negative temperatures
[ Upstream commit de2bf507fabba9c0c678cf5ed54beb546f5ca29a ]
Negative temperatures are reported as large positive temperatures
due to missing sign extension from unsigned int to long. Cast unsigned
raw register values to signed before performing the calculations
to fix the problem.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: fff7b8ab2255 ("hwmon: add Texas Instruments TPS23861 driver")
Signed-off-by: Murad Masimov <m.masimov@xxxxxxxxx>
Message-ID: <20241121173604.2021-1-m.masimov@xxxxxxxxx>
[groeck: Updated subject and description]
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hwmon/tps23861.c b/drivers/hwmon/tps23861.c
index dfcfb09d9f3cd..80fb03f30c302 100644
--- a/drivers/hwmon/tps23861.c
+++ b/drivers/hwmon/tps23861.c
@@ -132,7 +132,7 @@ static int tps23861_read_temp(struct tps23861_data *data, long *val)
if (err < 0)
return err;
- *val = (regval * TEMPERATURE_LSB) - 20000;
+ *val = ((long)regval * TEMPERATURE_LSB) - 20000;
return 0;
}
