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Commit 52e4f1d6 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: dm355evm_keys - switch to using managed resources 



Using devm_* APIs simpifies error handling and device teardown.

Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent fc2a6e50

drivers/input/misc/dm355evm_keys.c

+26 −50
Original line number Diff line number Diff line
@@ -32,7 +32,6 @@ 
struct dm355evm_keys {

	struct input_dev	*input;

	struct device		*dev;

	int			irq;

};



/* These initial keycodes can be remapped */
@@ -176,71 +175,49 @@ static int dm355evm_keys_probe(struct platform_device *pdev) 
{

	struct dm355evm_keys	*keys;

	struct input_dev	*input;

	int			status;

	int			irq;

	int			error;



	/* allocate instance struct and input dev */

	keys = kzalloc(sizeof *keys, GFP_KERNEL);

	input = input_allocate_device();

	if (!keys || !input) {

		status = -ENOMEM;

		goto fail1;

	}

	keys = devm_kzalloc(&pdev->dev, sizeof (*keys), GFP_KERNEL);

	if (!keys)

		return -ENOMEM;



	input = devm_input_allocate_device(&pdev->dev);

	if (!input)

		return -ENOMEM;



	keys->dev = &pdev->dev;

	keys->input = input;



	/* set up "threaded IRQ handler" */

	status = platform_get_irq(pdev, 0);

	if (status < 0)

		goto fail1;

	keys->irq = status;



	input->name = "DM355 EVM Controls";

	input->phys = "dm355evm/input0";

	input->dev.parent = &pdev->dev;



	input->id.bustype = BUS_I2C;

	input->id.product = 0x0355;

	input->id.version = dm355evm_msp_read(DM355EVM_MSP_FIRMREV);



	status = sparse_keymap_setup(input, dm355evm_keys, NULL);

	if (status)

		goto fail1;

	error = sparse_keymap_setup(input, dm355evm_keys, NULL);

	if (error)

		return error;



	/* REVISIT:  flush the event queue? */



	status = request_threaded_irq(keys->irq, NULL, dm355evm_keys_irq,

	/* set up "threaded IRQ handler" */

	irq = platform_get_irq(pdev, 0);

	if (irq < 0)

		return irq;



	error = devm_request_threaded_irq(&pdev->dev, irq,

					  NULL, dm355evm_keys_irq,

					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,

					  dev_name(&pdev->dev), keys);

	if (status < 0)

		goto fail1;

	if (error)

		return error;



	/* register */

	status = input_register_device(input);

	if (status < 0)

		goto fail2;



	platform_set_drvdata(pdev, keys);



	return 0;



fail2:

	free_irq(keys->irq, keys);

fail1:

	input_free_device(input);

	kfree(keys);

	dev_err(&pdev->dev, "can't register, err %d\n", status);



	return status;

}



static int dm355evm_keys_remove(struct platform_device *pdev)

{

	struct dm355evm_keys	*keys = platform_get_drvdata(pdev);



	free_irq(keys->irq, keys);

	input_unregister_device(keys->input);

	kfree(keys);

	error = input_register_device(input);

	if (error)

		return error;



	return 0;

}
@@ -256,7 +233,6 @@ static int dm355evm_keys_remove(struct platform_device *pdev) 
 */

static struct platform_driver dm355evm_keys_driver = {

	.probe		= dm355evm_keys_probe,

	.remove		= dm355evm_keys_remove,

	.driver		= {

		.name	= "dm355evm_keys",

	},