hwmon: (scmi) return -EINVAL when sensor information is unavailable

Passing NULL pointer to PTR_ERR will result in return value of 0
indicating success which is clearly not what it is intended here.

This patch returns -EINVAL instead when the sensor information is not
available.

Fixes: b23688aefb8b ("hwmon: add support for sensors exported via ARM SCMI")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/drivers/hwmon/scmi-hwmon.c b/drivers/hwmon/scmi-hwmon.c
index 32e750373cede1bd3c1891f3c91d352a6d1806ae..363bf56eb0f29c89965d48317282653c6598f417 100644 (file)
--- a/drivers/hwmon/scmi-hwmon.c
+++ b/drivers/hwmon/scmi-hwmon.c
@@ -138,7 +138,7 @@ static int scmi_hwmon_probe(struct scmi_device *sdev)
        for (i = 0; i < nr_sensors; i++) {
                sensor = handle->sensor_ops->info_get(handle, i);
                if (!sensor)
-                       return PTR_ERR(sensor);
+                       return -EINVAL;
 
                switch (sensor->type) {
                case TEMPERATURE_C: