5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> [ 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> --- drivers/hwmon/ltc2992.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) 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; -- 2.43.0
