The input->shunt_resistor is int type while the value from DT is
unsigned int. Meanwhile, a divide-by-zero error would happen if
the value is 0. So this patch just simply validates the value.
Signed-off-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx>
---
Changelog
v1->v2:
* Validate the value and error out
drivers/hwmon/ina3221.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
index c3a497aed345..4f3ed24efe8e 100644
--- a/drivers/hwmon/ina3221.c
+++ b/drivers/hwmon/ina3221.c
@@ -536,8 +536,14 @@ static int ina3221_probe_child_from_dt(struct device *dev,
of_property_read_string(child, "label", &input->label);
/* Overwrite default shunt resistor value optionally */
- if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val))
+ if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val)) {
+ if (val < 1 || val > INT_MAX) {
+ dev_err(dev, "invalid shunt resistor value %u of %s\n",
+ val, child->name);
+ return -EINVAL;
+ }
input->shunt_resistor = val;
+ }
return 0;
}
--
2.17.1
