Commit e7339118 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: kxtj9 - switch to using managed resources 

Using devm API allows to clean up error handling and drop the remove()
method.

Link: https://lore.kernel.org/r/20191017204217.106453-22-dmitry.torokhov@gmail.com


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent b873f73c

drivers/input/misc/kxtj9.c

+28 −58
Original line number Diff line number Diff line
@@ -292,7 +292,6 @@ static void kxtj9_init_input_device(struct kxtj9_data *tj9, 


	input_dev->name = "kxtj9_accel";

	input_dev->id.bustype = BUS_I2C;

	input_dev->dev.parent = &tj9->client->dev;

}



static int kxtj9_setup_input_device(struct kxtj9_data *tj9)
@@ -300,7 +299,7 @@ static int kxtj9_setup_input_device(struct kxtj9_data *tj9) 
	struct input_dev *input_dev;

	int err;



	input_dev = input_allocate_device();

	input_dev = devm_input_allocate_device(&tj9->client->dev);

	if (!input_dev) {

		dev_err(&tj9->client->dev, "input device allocate failed\n");

		return -ENOMEM;
@@ -319,7 +318,6 @@ static int kxtj9_setup_input_device(struct kxtj9_data *tj9) 
		dev_err(&tj9->client->dev,

			"unable to register input polled device %s: %d\n",

			tj9->input_dev->name, err);

		input_free_device(tj9->input_dev);

		return err;

	}
@@ -424,8 +422,8 @@ static int kxtj9_setup_polled_device(struct kxtj9_data *tj9) 
{

	int err;

	struct input_polled_dev *poll_dev;

	poll_dev = input_allocate_polled_device();



	poll_dev = devm_input_allocate_polled_device(&tj9->client->dev);

	if (!poll_dev) {

		dev_err(&tj9->client->dev,

			"Failed to allocate polled device\n");
@@ -446,19 +444,12 @@ static int kxtj9_setup_polled_device(struct kxtj9_data *tj9) 
	if (err) {

		dev_err(&tj9->client->dev,

			"Unable to register polled device, err=%d\n", err);

		input_free_polled_device(poll_dev);

		return err;

	}



	return 0;

}



static void kxtj9_teardown_polled_device(struct kxtj9_data *tj9)

{

	input_unregister_polled_device(tj9->poll_dev);

	input_free_polled_device(tj9->poll_dev);

}



#else



static inline int kxtj9_setup_polled_device(struct kxtj9_data *tj9)
@@ -466,11 +457,15 @@ static inline int kxtj9_setup_polled_device(struct kxtj9_data *tj9) 
	return -ENOSYS;

}



static inline void kxtj9_teardown_polled_device(struct kxtj9_data *tj9)

#endif



static void kxtj9_platform_exit(void *data)

{

}

	struct kxtj9_data *tj9 = data;



#endif

	if (tj9->pdata.exit)

		tj9->pdata.exit();

}



static int kxtj9_verify(struct kxtj9_data *tj9)

{
@@ -512,7 +507,7 @@ static int kxtj9_probe(struct i2c_client *client, 
		return -EINVAL;

	}



	tj9 = kzalloc(sizeof(*tj9), GFP_KERNEL);

	tj9 = devm_kzalloc(&client->dev, sizeof(*tj9), GFP_KERNEL);

	if (!tj9) {

		dev_err(&client->dev,

			"failed to allocate memory for module data\n");
@@ -525,13 +520,17 @@ static int kxtj9_probe(struct i2c_client *client, 
	if (pdata->init) {

		err = pdata->init();

		if (err < 0)

			goto err_free_mem;

			return err;

	}



	err = devm_add_action_or_reset(&client->dev, kxtj9_platform_exit, tj9);

	if (err)

		return err;



	err = kxtj9_verify(tj9);

	if (err < 0) {

		dev_err(&client->dev, "device not recognized\n");

		goto err_pdata_exit;

		return err;

	}



	i2c_set_clientdata(client, tj9);
@@ -546,59 +545,31 @@ static int kxtj9_probe(struct i2c_client *client, 


		err = kxtj9_setup_input_device(tj9);

		if (err)

			goto err_pdata_exit;

			return err;



		err = request_threaded_irq(client->irq, NULL, kxtj9_isr,

					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,

		err = devm_request_threaded_irq(&client->dev, client->irq,

						NULL, kxtj9_isr,

						IRQF_TRIGGER_RISING |

							IRQF_ONESHOT,

						"kxtj9-irq", tj9);

		if (err) {

			dev_err(&client->dev, "request irq failed: %d\n", err);

			goto err_destroy_input;

			return err;

		}



		err = sysfs_create_group(&client->dev.kobj, &kxtj9_attribute_group);

		err = devm_device_add_group(&client->dev,

					    &kxtj9_attribute_group);

		if (err) {

			dev_err(&client->dev, "sysfs create failed: %d\n", err);

			goto err_free_irq;

			return err;

		}



	} else {

		err = kxtj9_setup_polled_device(tj9);

		if (err)

			goto err_pdata_exit;

	}



	return 0;



err_free_irq:

	free_irq(client->irq, tj9);

err_destroy_input:

	input_unregister_device(tj9->input_dev);

err_pdata_exit:

	if (tj9->pdata.exit)

		tj9->pdata.exit();

err_free_mem:

	kfree(tj9);

			return err;

	}



static int kxtj9_remove(struct i2c_client *client)

{

	struct kxtj9_data *tj9 = i2c_get_clientdata(client);



	if (client->irq) {

		sysfs_remove_group(&client->dev.kobj, &kxtj9_attribute_group);

		free_irq(client->irq, tj9);

		input_unregister_device(tj9->input_dev);

	} else {

		kxtj9_teardown_polled_device(tj9);

	}



	if (tj9->pdata.exit)

		tj9->pdata.exit();



	kfree(tj9);



	return 0;

}
@@ -647,7 +618,6 @@ static struct i2c_driver kxtj9_driver = { 
		.pm	= &kxtj9_pm_ops,

	},

	.probe		= kxtj9_probe,

	.remove		= kxtj9_remove,

	.id_table	= kxtj9_id,

};

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