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hwmon: (ltc2992) Avoid division by zero

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[ 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@analog.com>
Link: https://lore.kernel.org/r/20231011135754.13508-1-antoniu.miclaus@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Antoniu Miclaus
2023-10-11 16:57:53 +03:00
committed by Greg Kroah-Hartman
parent 8c00db8017
commit 1ba15435a6
1 changed files with 5 additions and 1 deletions
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6
drivers/hwmon/ltc2992.c
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@@ -875,8 +875,12 @@ 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;