[PATCH] hwmon: (sht3x) Fix error handling

[PATCH] hwmon: (sht3x) Fix error handling

[Guenter Roeck]

Handling of errors when reading status, temperature, and humidity returns
the error number as negative attribute value. Fix it up by returning
the error as return value.

Fixes: a0ac418c6007c ("hwmon: (sht3x) convert some of sysfs interface to hwmon")
Cc: JuenKit Yip <JuenKit_Yip@hotmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/sht3x.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/hwmon/sht3x.c b/drivers/hwmon/sht3x.c
index 557ad3e7752a..f36c0229328f 100644
--- a/drivers/hwmon/sht3x.c
+++ b/drivers/hwmon/sht3x.c
@@ -291,24 +291,26 @@ static struct sht3x_data *sht3x_update_client(struct device *dev)
 	return data;
 }
 
-static int temp1_input_read(struct device *dev)
+static int temp1_input_read(struct device *dev, long *temp)
 {
 	struct sht3x_data *data = sht3x_update_client(dev);
 
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
-	return data->temperature;
+	*temp = data->temperature;
+	return 0;
 }
 
-static int humidity1_input_read(struct device *dev)
+static int humidity1_input_read(struct device *dev, long *humidity)
 {
 	struct sht3x_data *data = sht3x_update_client(dev);
 
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
-	return data->humidity;
+	*humidity = data->humidity;
+	return 0;
 }
 
 /*
@@ -706,6 +708,7 @@ static int sht3x_read(struct device *dev, enum hwmon_sensor_types type,
 		      u32 attr, int channel, long *val)
 {
 	enum sht3x_limits index;
+	int ret;
 
 	switch (type) {
 	case hwmon_chip:
@@ -720,10 +723,12 @@ static int sht3x_read(struct device *dev, enum hwmon_sensor_types type,
 	case hwmon_temp:
 		switch (attr) {
 		case hwmon_temp_input:
-			*val = temp1_input_read(dev);
-			break;
+			return temp1_input_read(dev, val);
 		case hwmon_temp_alarm:
-			*val = temp1_alarm_read(dev);
+			ret = temp1_alarm_read(dev);
+			if (ret < 0)
+				return ret;
+			*val = ret;
 			break;
 		case hwmon_temp_max:
 			index = limit_max;
@@ -748,10 +753,12 @@ static int sht3x_read(struct device *dev, enum hwmon_sensor_types type,
 	case hwmon_humidity:
 		switch (attr) {
 		case hwmon_humidity_input:
-			*val = humidity1_input_read(dev);
-			break;
+			return humidity1_input_read(dev, val);
 		case hwmon_humidity_alarm:
-			*val = humidity1_alarm_read(dev);
+			ret = humidity1_alarm_read(dev);
+			if (ret < 0)
+				return ret;
+			*val = ret;
 			break;
 		case hwmon_humidity_max:
 			index = limit_max;
-- 
2.45.2