hwmon: Fix unchecked return status, SMSC chips

hwmon: Fix unchecked return status, SMSC chips

Fix up 2 more hwmon drivers so that they no longer ignore return
status from device_create_file().

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 145 insertions, 83 deletions

diff --git a/drivers/hwmon/smsc47m1.c b/drivers/hwmon/smsc47m1.c
index 9cd28f2709fc..47132fd26b1b 100644
--- a/drivers/hwmon/smsc47m1.c
+++ b/drivers/hwmon/smsc47m1.c
@@ -35,6 +35,7 @@
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
+#include <linux/sysfs.h>
 #include <asm/io.h>
 
 /* Address is autodetected, there is no default value */
@@ -347,6 +348,30 @@ fan_present(2);
 
 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 
+/* Almost all sysfs files may or may not be created depending on the chip
+   setup so we create them individually. It is still convenient to define a
+   group to remove them all at once. */
+static struct attribute *smsc47m1_attributes[] = {
+        &dev_attr_fan1_input.attr,
+        &dev_attr_fan1_min.attr,
+        &dev_attr_fan1_div.attr,
+        &dev_attr_fan2_input.attr,
+        &dev_attr_fan2_min.attr,
+        &dev_attr_fan2_div.attr,
+
+        &dev_attr_pwm1.attr,
+        &dev_attr_pwm1_enable.attr,
+        &dev_attr_pwm2.attr,
+        &dev_attr_pwm2_enable.attr,
+
+        &dev_attr_alarms.attr,
+        NULL
+};
+
+static const struct attribute_group smsc47m1_group = {
+        .attrs = smsc47m1_attributes,
+};
+
 static int __init smsc47m1_find(unsigned short *addr)
 {
         u8 val;
@@ -447,46 +472,62 @@ static int smsc47m1_detect(struct i2c_adapter *adapter)
         smsc47m1_update_device(&new_client->dev, 1);
 
         /* Register sysfs hooks */
-        data->class_dev = hwmon_device_register(&new_client->dev);
-        if (IS_ERR(data->class_dev)) {
-                err = PTR_ERR(data->class_dev);
-                goto error_detach;
-        }
-
         if (fan1) {
-                device_create_file(&new_client->dev, &dev_attr_fan1_input);
-                device_create_file(&new_client->dev, &dev_attr_fan1_min);
-                device_create_file(&new_client->dev, &dev_attr_fan1_div);
+                if ((err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan1_input))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan1_min))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan1_div)))
+                        goto error_remove_files;
         } else
                 dev_dbg(&new_client->dev, "Fan 1 not enabled by hardware, "
                         "skipping\n");
 
         if (fan2) {
-                device_create_file(&new_client->dev, &dev_attr_fan2_input);
-                device_create_file(&new_client->dev, &dev_attr_fan2_min);
-                device_create_file(&new_client->dev, &dev_attr_fan2_div);
+                if ((err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan2_input))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan2_min))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_fan2_div)))
+                        goto error_remove_files;
         } else
                 dev_dbg(&new_client->dev, "Fan 2 not enabled by hardware, "
                         "skipping\n");
 
         if (pwm1) {
-                device_create_file(&new_client->dev, &dev_attr_pwm1);
-                device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
+                if ((err = device_create_file(&new_client->dev,
+                                              &dev_attr_pwm1))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_pwm1_enable)))
+                        goto error_remove_files;
         } else
                 dev_dbg(&new_client->dev, "PWM 1 not enabled by hardware, "
                         "skipping\n");
         if (pwm2) {
-                device_create_file(&new_client->dev, &dev_attr_pwm2);
-                device_create_file(&new_client->dev, &dev_attr_pwm2_enable);
+                if ((err = device_create_file(&new_client->dev,
+                                              &dev_attr_pwm2))
+                 || (err = device_create_file(&new_client->dev,
+                                              &dev_attr_pwm2_enable)))
+                        goto error_remove_files;
         } else
                 dev_dbg(&new_client->dev, "PWM 2 not enabled by hardware, "
                         "skipping\n");
 
-        device_create_file(&new_client->dev, &dev_attr_alarms);
+        if ((err = device_create_file(&new_client->dev, &dev_attr_alarms)))
+                goto error_remove_files;
+
+        data->class_dev = hwmon_device_register(&new_client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto error_remove_files;
+        }
 
         return 0;
 
-error_detach:
+error_remove_files:
+        sysfs_remove_group(&new_client->dev.kobj, &smsc47m1_group);
         i2c_detach_client(new_client);
 error_free:
         kfree(data);
@@ -501,6 +542,7 @@ static int smsc47m1_detach_client(struct i2c_client *client)
         int err;
 
         hwmon_device_unregister(data->class_dev);
+        sysfs_remove_group(&client->dev.kobj, &smsc47m1_group);
 
         if ((err = i2c_detach_client(client)))
                 return err;
diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
index bdc4570acf9a..a6833f437395 100644
--- a/drivers/hwmon/smsc47m192.c
+++ b/drivers/hwmon/smsc47m192.c
@@ -30,6 +30,7 @@
 #include <linux/hwmon-sysfs.h>
 #include <linux/hwmon-vid.h>
 #include <linux/err.h>
+#include <linux/sysfs.h>
 
 /* Addresses to scan */
 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
@@ -370,6 +371,75 @@ static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
 
+static struct attribute *smsc47m192_attributes[] = {
+        &sensor_dev_attr_in0_input.dev_attr.attr,
+        &sensor_dev_attr_in0_min.dev_attr.attr,
+        &sensor_dev_attr_in0_max.dev_attr.attr,
+        &sensor_dev_attr_in0_alarm.dev_attr.attr,
+        &sensor_dev_attr_in1_input.dev_attr.attr,
+        &sensor_dev_attr_in1_min.dev_attr.attr,
+        &sensor_dev_attr_in1_max.dev_attr.attr,
+        &sensor_dev_attr_in1_alarm.dev_attr.attr,
+        &sensor_dev_attr_in2_input.dev_attr.attr,
+        &sensor_dev_attr_in2_min.dev_attr.attr,
+        &sensor_dev_attr_in2_max.dev_attr.attr,
+        &sensor_dev_attr_in2_alarm.dev_attr.attr,
+        &sensor_dev_attr_in3_input.dev_attr.attr,
+        &sensor_dev_attr_in3_min.dev_attr.attr,
+        &sensor_dev_attr_in3_max.dev_attr.attr,
+        &sensor_dev_attr_in3_alarm.dev_attr.attr,
+        &sensor_dev_attr_in5_input.dev_attr.attr,
+        &sensor_dev_attr_in5_min.dev_attr.attr,
+        &sensor_dev_attr_in5_max.dev_attr.attr,
+        &sensor_dev_attr_in5_alarm.dev_attr.attr,
+        &sensor_dev_attr_in6_input.dev_attr.attr,
+        &sensor_dev_attr_in6_min.dev_attr.attr,
+        &sensor_dev_attr_in6_max.dev_attr.attr,
+        &sensor_dev_attr_in6_alarm.dev_attr.attr,
+        &sensor_dev_attr_in7_input.dev_attr.attr,
+        &sensor_dev_attr_in7_min.dev_attr.attr,
+        &sensor_dev_attr_in7_max.dev_attr.attr,
+        &sensor_dev_attr_in7_alarm.dev_attr.attr,
+
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_min.dev_attr.attr,
+        &sensor_dev_attr_temp1_offset.dev_attr.attr,
+        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_max.dev_attr.attr,
+        &sensor_dev_attr_temp2_min.dev_attr.attr,
+        &sensor_dev_attr_temp2_offset.dev_attr.attr,
+        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_input_fault.dev_attr.attr,
+        &sensor_dev_attr_temp3_input.dev_attr.attr,
+        &sensor_dev_attr_temp3_max.dev_attr.attr,
+        &sensor_dev_attr_temp3_min.dev_attr.attr,
+        &sensor_dev_attr_temp3_offset.dev_attr.attr,
+        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp3_input_fault.dev_attr.attr,
+
+        &dev_attr_cpu0_vid.attr,
+        &dev_attr_vrm.attr,
+        NULL
+};
+
+static const struct attribute_group smsc47m192_group = {
+        .attrs = smsc47m192_attributes,
+};
+
+static struct attribute *smsc47m192_attributes_in4[] = {
+        &sensor_dev_attr_in4_input.dev_attr.attr,
+        &sensor_dev_attr_in4_min.dev_attr.attr,
+        &sensor_dev_attr_in4_max.dev_attr.attr,
+        &sensor_dev_attr_in4_alarm.dev_attr.attr,
+        NULL
+};
+
+static const struct attribute_group smsc47m192_group_in4 = {
+        .attrs = smsc47m192_attributes_in4,
+};
+
 /* This function is called when:
     * smsc47m192_driver is inserted (when this module is loaded), for each
       available adapter
@@ -471,80 +541,28 @@ static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
         smsc47m192_init_client(client);
 
         /* Register sysfs hooks */
-        data->class_dev = hwmon_device_register(&client->dev);
-        if (IS_ERR(data->class_dev)) {
-                err = PTR_ERR(data->class_dev);
+        if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
                 goto exit_detach;
-        }
-
-        device_create_file(&client->dev, &sensor_dev_attr_in0_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in0_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in0_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in0_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in1_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in1_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in1_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in1_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in2_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in2_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in2_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in2_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in3_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in3_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in3_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in3_alarm.dev_attr);
 
         /* Pin 110 is either in4 (+12V) or VID4 */
         config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
         if (!(config & 0x20)) {
-                device_create_file(&client->dev,
-                                   &sensor_dev_attr_in4_input.dev_attr);
-                device_create_file(&client->dev,
-                                   &sensor_dev_attr_in4_min.dev_attr);
-                device_create_file(&client->dev,
-                                   &sensor_dev_attr_in4_max.dev_attr);
-                device_create_file(&client->dev,
-                                   &sensor_dev_attr_in4_alarm.dev_attr);
+                if ((err = sysfs_create_group(&client->dev.kobj,
+                                              &smsc47m192_group_in4)))
+                        goto exit_remove_files;
+        }
+
+        data->class_dev = hwmon_device_register(&client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto exit_remove_files;
         }
-        device_create_file(&client->dev, &sensor_dev_attr_in5_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in5_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in5_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in5_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in6_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in6_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in6_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in6_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in7_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in7_min.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in7_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_in7_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp1_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp1_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp1_min.dev_attr);
-        device_create_file(&client->dev,
-                           &sensor_dev_attr_temp1_offset.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp1_alarm.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp2_min.dev_attr);
-        device_create_file(&client->dev,
-                           &sensor_dev_attr_temp2_offset.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr);
-        device_create_file(&client->dev,
-                           &sensor_dev_attr_temp2_input_fault.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp3_input.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp3_max.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp3_min.dev_attr);
-        device_create_file(&client->dev,
-                           &sensor_dev_attr_temp3_offset.dev_attr);
-        device_create_file(&client->dev, &sensor_dev_attr_temp3_alarm.dev_attr);
-        device_create_file(&client->dev,
-                           &sensor_dev_attr_temp3_input_fault.dev_attr);
-        device_create_file(&client->dev, &dev_attr_cpu0_vid);
-        device_create_file(&client->dev, &dev_attr_vrm);
 
         return 0;
 
+exit_remove_files:
+        sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
+        sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
 exit_detach:
         i2c_detach_client(client);
 exit_free:
@@ -559,6 +577,8 @@ static int smsc47m192_detach_client(struct i2c_client *client)
         int err;
 
         hwmon_device_unregister(data->class_dev);
+        sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
+        sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
 
         if ((err = i2c_detach_client(client)))
                 return err;