hwmon: (aquacomputer_d5next) Check if temp sensors of legacy devices are connected

Return -ENODATA if a temp sensor of a legacy device
does not contain a reading.

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20231016083559.139341-2-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/aquacomputer_d5next.c b/drivers/hwmon/aquacomputer_d5next.c
index 0378edd52134d1b25a9174e646cce3cfc2b09d66..4fdd2e12427b9dfa2d1c8f62914cb9657efb07ac 100644 (file)
--- a/drivers/hwmon/aquacomputer_d5next.c
+++ b/drivers/hwmon/aquacomputer_d5next.c
@@ -953,7 +953,10 @@ static int aqc_legacy_read(struct aqc_data *priv)
        for (i = 0; i < priv->num_temp_sensors; i++) {
                sensor_value = get_unaligned_le16(priv->buffer + priv->temp_sensor_start_offset +
                                                  i * AQC_SENSOR_SIZE);
-               priv->temp_input[i] = sensor_value * 10;
+               if (sensor_value == AQC_SENSOR_NA)
+                       priv->temp_input[i] = -ENODATA;
+               else
+                       priv->temp_input[i] = sensor_value * 10;
        }
 
        /* Special-case sensor readings */