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hwmon: (jc42) Convert to use devm_kzalloc

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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>
This commit is contained in:
Guenter Roeck 2012-02-22 08:56:47 -08:00 committed by Guenter Roeck
parent 918ddef35f
commit f15df57ded
1 changed files with 25 additions and 35 deletions
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60
drivers/hwmon/jc42.c
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@ -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;
}