linux-kernel - [PATCH 1/2] hwmon: (aquacomputer_d5next) Check if temp sensors of legacy devices are connected

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Date:   Mon, 16 Oct 2023 10:35:57 +0200
From:   Aleksa Savic <savicaleksa83@...il.com>
To:     linux-hwmon@...r.kernel.org
Cc:     leonard.anderweit@...il.com,
        Aleksa Savic <savicaleksa83@...il.com>,
        Jack Doan <me@...kdoan.com>, Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] 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@...il.com>
Signed-off-by: Aleksa Savic <savicaleksa83@...il.com>
---
 drivers/hwmon/aquacomputer_d5next.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/aquacomputer_d5next.c b/drivers/hwmon/aquacomputer_d5next.c
index 023807859be7..46ff4fd4f87d 100644
--- a/drivers/hwmon/aquacomputer_d5next.c
+++ b/drivers/hwmon/aquacomputer_d5next.c
@@ -926,7 +926,10 @@ 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 */
-- 
2.41.0