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Commit c1ec0cab authored by Dan Carpenter's avatar Dan Carpenter Committed by Guenter Roeck
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hwmon: (adt7470) Prevent divide by zero in adt7470_fan_write()



The "val" variable is controlled by the user and comes from
hwmon_attr_store().  The FAN_RPM_TO_PERIOD() macro divides by "val"
so a zero will crash the system.  Check for that and return -EINVAL.
Negatives are also invalid so return -EINVAL for those too.

Fixes: fc958a61 ("hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent f1e75e0d
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