hwmon: (jc42) Convert to use devm_kzalloc

Marginally less code and eliminate the possibility of memory leaks.
Also replace new_client variable with client and introduce dev variable to make
the code a bit easier to read.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 25 insertions, 35 deletions

diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c
index 877e1593655..a002bdac470 100644
--- a/drivers/hwmon/jc42.c
+++ b/drivers/hwmon/jc42.c
@@ -469,20 +469,19 @@ static const struct attribute_group jc42_group = {
 };
 
 /* Return 0 if detection is successful, -ENODEV otherwise */
-static int jc42_detect(struct i2c_client *new_client,
-                       struct i2c_board_info *info)
+static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
 {
-        struct i2c_adapter *adapter = new_client->adapter;
+        struct i2c_adapter *adapter = client->adapter;
         int i, config, cap, manid, devid;
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
                                      I2C_FUNC_SMBUS_WORD_DATA))
                 return -ENODEV;
 
-        cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP);
-        config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG);
-        manid = i2c_smbus_read_word_swapped(new_client, JC42_REG_MANID);
-        devid = i2c_smbus_read_word_swapped(new_client, JC42_REG_DEVICEID);
+        cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
+        config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
+        manid = i2c_smbus_read_word_swapped(client, JC42_REG_MANID);
+        devid = i2c_smbus_read_word_swapped(client, JC42_REG_DEVICEID);
 
         if (cap < 0 || config < 0 || manid < 0 || devid < 0)
                 return -ENODEV;
@@ -501,47 +500,42 @@ static int jc42_detect(struct i2c_client *new_client,
         return -ENODEV;
 }
 
-static int jc42_probe(struct i2c_client *new_client,
-                      const struct i2c_device_id *id)
+static int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
         struct jc42_data *data;
         int config, cap, err;
+        struct device *dev = &client->dev;
 
-        data = kzalloc(sizeof(struct jc42_data), GFP_KERNEL);
-        if (!data) {
-                err = -ENOMEM;
-                goto exit;
-        }
+        data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
 
-        i2c_set_clientdata(new_client, data);
+        i2c_set_clientdata(client, data);
         mutex_init(&data->update_lock);
 
-        cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP);
-        if (cap < 0) {
-                err = -EINVAL;
-                goto exit_free;
-        }
+        cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
+        if (cap < 0)
+                return cap;
+
         data->extended = !!(cap & JC42_CAP_RANGE);
 
-        config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG);
-        if (config < 0) {
-                err = -EINVAL;
-                goto exit_free;
-        }
+        config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
+        if (config < 0)
+                return config;
+
         data->orig_config = config;
         if (config & JC42_CFG_SHUTDOWN) {
                 config &= ~JC42_CFG_SHUTDOWN;
-                i2c_smbus_write_word_swapped(new_client, JC42_REG_CONFIG,
-                                             config);
+                i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config);
         }
         data->config = config;
 
         /* Register sysfs hooks */
-        err = sysfs_create_group(&new_client->dev.kobj, &jc42_group);
+        err = sysfs_create_group(&dev->kobj, &jc42_group);
         if (err)
-                goto exit_free;
+                return err;
 
-        data->hwmon_dev = hwmon_device_register(&new_client->dev);
+        data->hwmon_dev = hwmon_device_register(dev);
         if (IS_ERR(data->hwmon_dev)) {
                 err = PTR_ERR(data->hwmon_dev);
                 goto exit_remove;
@@ -550,10 +544,7 @@ static int jc42_probe(struct i2c_client *new_client,
         return 0;
 
 exit_remove:
-        sysfs_remove_group(&new_client->dev.kobj, &jc42_group);
-exit_free:
-        kfree(data);
-exit:
+        sysfs_remove_group(&dev->kobj, &jc42_group);
         return err;
 }
 
@@ -565,7 +556,6 @@ static int jc42_remove(struct i2c_client *client)
         if (data->config != data->orig_config)
                 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG,
                                              data->orig_config);
-        kfree(data);
         return 0;
 }