staging: iio: ad7746: Use devm_iio_device_alloc

Using devm_iio_device_alloc makes code simpler.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/cdc/ad7746.c

@@ -699,11 +699,9 @@ static int ad7746_probe(struct i2c_client *client,
 	int ret = 0;
 	unsigned char regval = 0;
 
-	indio_dev = iio_device_alloc(sizeof(*chip));
-	if (indio_dev == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+	if (!indio_dev)
+		return -ENOMEM;
 	chip = iio_priv(indio_dev);
 	/* this is only used for device removal purposes */
 	i2c_set_clientdata(client, indio_dev);
@@ -748,20 +746,15 @@ static int ad7746_probe(struct i2c_client *client,
 	ret = i2c_smbus_write_byte_data(chip->client,
 					AD7746_REG_EXC_SETUP, regval);
 	if (ret < 0)
-		goto error_free_dev;
+		return ret;
 
 	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_free_dev;
+		return ret;
 
 	dev_info(&client->dev, "%s capacitive sensor registered\n", id->name);
 
 	return 0;
-
-error_free_dev:
-	iio_device_free(indio_dev);
-error_ret:
-	return ret;
 }
 
 static int ad7746_remove(struct i2c_client *client)
@@ -769,7 +762,6 @@ static int ad7746_remove(struct i2c_client *client)
 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
 	iio_device_unregister(indio_dev);
-	iio_device_free(indio_dev);
 
 	return 0;
 }