This is a note to let you know that I've just added the patch titled
hwmon: (ltc2992) Avoid division by zero
to the 5.15-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-ltc2992-avoid-division-by-zero.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 11cf96b237a7830d9f4278c5e31d0373a2c410b7
Author: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
Date: Wed Oct 11 16:57:53 2023 +0300
hwmon: (ltc2992) Avoid division by zero
[ Upstream commit 10b02902048737f376104bc69e5212466e65a542 ]
Do not allow setting shunt resistor to 0. This results in a division by
zero when performing current value computations based on input voltages
and connected resistor values.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231011135754.13508-1-antoniu.miclaus@xxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c
index 009a0a5af9236..a657f93882dd1 100644
--- a/drivers/hwmon/ltc2992.c
+++ b/drivers/hwmon/ltc2992.c
@@ -912,8 +912,12 @@ static int ltc2992_parse_dt(struct ltc2992_state *st)
}
ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val);
- if (!ret)
+ if (!ret) {
+ if (!val)
+ return dev_err_probe(&st->client->dev, -EINVAL,
+ "shunt resistor value cannot be zero\n");
st->r_sense_uohm[addr] = val;
+ }
}
return 0;
