diff options
| author | Nicolin Chen <nicoleotsuka@gmail.com> | 2018-10-08 14:24:51 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2018-10-10 20:37:13 -0700 |
| commit | a6e43263ed01fa617e0a0c13ea8a5f1538573380 (patch) | |
| tree | 2081d1c550cdda7732cad817df32c34277274339 /drivers/hwmon/ina3221.c | |
| parent | 8b9bf554dd530a40cd06a709edb8ec96b4de1d1a (diff) | |
hwmon: (ina3221) Validate shunt resistor value from DT
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@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/ina3221.c')
| -rw-r--r-- | drivers/hwmon/ina3221.c | 8 |
1 files changed, 7 insertions, 1 deletions
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; } |