hwmon: (mcp3021) Convert to use devm_ functions

Convert to use devm_ functions to reduce code size and simplify the code.

Cc: Mingkai Hu <Mingkai.hu@freescale.com>
Cc: Xie Xiaobo <X.Xie@freescale.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/mcp3021.c b/drivers/hwmon/mcp3021.c
index d0afc0c..5162bb9 100644 (file)
--- a/drivers/hwmon/mcp3021.c
+++ b/drivers/hwmon/mcp3021.c
@@ -103,7 +103,8 @@ static int mcp3021_probe(struct i2c_client *client,
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                return -ENODEV;
 
-       data = kzalloc(sizeof(struct mcp3021_data), GFP_KERNEL);
+       data = devm_kzalloc(&client->dev, sizeof(struct mcp3021_data),
+                           GFP_KERNEL);
        if (!data)
                return -ENOMEM;
 
@@ -111,17 +112,14 @@ static int mcp3021_probe(struct i2c_client *client,
 
        if (client->dev.platform_data) {
                data->vdd = *(u32 *)client->dev.platform_data;
-               if (data->vdd > MCP3021_VDD_MAX ||
-                               data->vdd < MCP3021_VDD_MIN) {
-                       err = -EINVAL;
-                       goto exit_free;
-               }
+               if (data->vdd > MCP3021_VDD_MAX || data->vdd < MCP3021_VDD_MIN)
+                       return -EINVAL;
        } else
                data->vdd = MCP3021_VDD_REF;
 
        err = sysfs_create_file(&client->dev.kobj, &dev_attr_in0_input.attr);
        if (err)
-               goto exit_free;
+               return err;
 
        data->hwmon_dev = hwmon_device_register(&client->dev);
        if (IS_ERR(data->hwmon_dev)) {
@@ -133,8 +131,6 @@ static int mcp3021_probe(struct i2c_client *client,
 
 exit_remove:
        sysfs_remove_file(&client->dev.kobj, &dev_attr_in0_input.attr);
-exit_free:
-       kfree(data);
        return err;
 }
 
@@ -144,7 +140,6 @@ static int mcp3021_remove(struct i2c_client *client)
 
        hwmon_device_unregister(data->hwmon_dev);
        sysfs_remove_file(&client->dev.kobj, &dev_attr_in0_input.attr);
-       kfree(data);
 
        return 0;
 }