[lm-sensors] [RFC][PATCH] hwmon:fix sparse warnings + error handling

[michal.k.k.piotrowski@gmail.com (Michal Piotrowski)]

Hi,

This patch fixes 56 sparse "ignoring return value of 'device_create_file'" warnings. It also adds error handling.

w83627hf.c |   96 ++++++++++++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 80 insertions(+), 16 deletions(-)

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/wiki/)

Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski at gmail.com>

diff -uprN -X linux-work/Documentation/dontdiff linux-work-clean/drivers/hwmon/w83627hf.c linux-work/drivers/hwmon/w83627hf.c
--- linux-work-clean/drivers/hwmon/w83627hf.c	2006-08-20 22:02:40.000000000 +0200
+++ linux-work/drivers/hwmon/w83627hf.c	2006-08-20 22:27:14.000000000 +0200
@@ -513,9 +513,21 @@ static DEVICE_ATTR(in0_max, S_IRUGO | S_

 #define device_create_file_in(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_in##offset##_input); \
-device_create_file(&client->dev, &dev_attr_in##offset##_min); \
-device_create_file(&client->dev, &dev_attr_in##offset##_max); \
+	err = device_create_file(&client->dev, &dev_attr_in##offset##_input); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_in##offset##_min); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_in##offset##_max); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 #define show_fan_reg(reg) \
@@ -577,8 +589,16 @@ sysfs_fan_min_offset(3);

 #define device_create_file_fan(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
-device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
+	err = device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 #define show_temp_reg(reg) \
@@ -657,9 +677,21 @@ sysfs_temp_offsets(3);

 #define device_create_file_temp(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
-device_create_file(&client->dev, &dev_attr_temp##offset##_max); \
-device_create_file(&client->dev, &dev_attr_temp##offset##_max_hyst); \
+	err = device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_temp##offset##_max); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_temp##offset##_max_hyst); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 static ssize_t
@@ -670,7 +702,11 @@ show_vid_reg(struct device *dev, struct
 }
 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
 #define device_create_file_vid(client) \
-device_create_file(&client->dev, &dev_attr_cpu0_vid)
+err = device_create_file(&client->dev, &dev_attr_cpu0_vid); \
+if (err) { \
+	hwmon_device_unregister(data->class_dev); \
+	return err; \
+} \

 static ssize_t
 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
@@ -692,7 +728,11 @@ store_vrm_reg(struct device *dev, struct
 }
 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 #define device_create_file_vrm(client) \
-device_create_file(&client->dev, &dev_attr_vrm)
+err = device_create_file(&client->dev, &dev_attr_vrm); \
+if (err) {\
+	hwmon_device_unregister(data->class_dev); \
+	return err; \
+} \

 static ssize_t
 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
@@ -702,7 +742,11 @@ show_alarms_reg(struct device *dev, stru
 }
 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
 #define device_create_file_alarms(client) \
-device_create_file(&client->dev, &dev_attr_alarms)
+err = device_create_file(&client->dev, &dev_attr_alarms); \
+if (err) {\
+	hwmon_device_unregister(data->class_dev); \
+	return err; \
+} \

 #define show_beep_reg(REG, reg) \
 static ssize_t show_beep_##reg (struct device *dev, struct device_attribute *attr, char *buf) \
@@ -767,8 +811,16 @@ sysfs_beep(MASK, mask);

 #define device_create_file_beep(client) \
 do { \
-device_create_file(&client->dev, &dev_attr_beep_enable); \
-device_create_file(&client->dev, &dev_attr_beep_mask); \
+	err = device_create_file(&client->dev, &dev_attr_beep_enable); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
+	err = device_create_file(&client->dev, &dev_attr_beep_mask); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 static ssize_t
@@ -838,7 +890,11 @@ sysfs_fan_div(3);

 #define device_create_file_fan_div(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
+	err = device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 static ssize_t
@@ -897,7 +953,11 @@ sysfs_pwm(3);

 #define device_create_file_pwm(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_pwm##offset); \
+	err = device_create_file(&client->dev, &dev_attr_pwm##offset); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)

 static ssize_t
@@ -973,7 +1033,11 @@ sysfs_sensor(3);

 #define device_create_file_sensor(client, offset) \
 do { \
-device_create_file(&client->dev, &dev_attr_temp##offset##_type); \
+	err = device_create_file(&client->dev, &dev_attr_temp##offset##_type); \
+	if (err) {\
+		hwmon_device_unregister(data->class_dev); \
+		return err; \
+	} \
 } while (0)