linux-kernel - Re: [PATCH] Input: arizona-haptic - convert to use managed input devices

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Date:	Mon, 6 Jul 2015 14:40:05 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Joshua Clayton <stillcompiling@...il.com>
Cc:	linux-input@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: arizona-haptic - convert to use managed input
 devices

On Mon, Jul 06, 2015 at 12:33:06PM -0700, Joshua Clayton wrote:
> Hi,
> It seems to me that swapping error for ret buries the functional changes in 
> the patch...
> would it be better to split them into a second  cleanup patch?

Fair enough, although I am not sure if I ever get to the renaming again
;)

Thanks.

-- 
Dmitry


Input: arizona-haptic - convert to use managed input devices

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

Using managed input device (via devm_input_allocate_device) simplifies
error handling and driver removal paths and also silences CID# 712569.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/misc/arizona-haptics.c |   26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/drivers/input/misc/arizona-haptics.c b/drivers/input/misc/arizona-haptics.c
index 4dbbed7..4bf6785 100644
--- a/drivers/input/misc/arizona-haptics.c
+++ b/drivers/input/misc/arizona-haptics.c
@@ -170,8 +170,8 @@ static int arizona_haptics_probe(struct platform_device *pdev)
 
 	INIT_WORK(&haptics->work, arizona_haptics_work);
 
-	haptics->input_dev = input_allocate_device();
-	if (haptics->input_dev == NULL) {
+	haptics->input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!haptics->input_dev) {
 		dev_err(arizona->dev, "Failed to allocate input device\n");
 		return -ENOMEM;
 	}
@@ -188,41 +188,23 @@ static int arizona_haptics_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
 			ret);
-		goto err_ialloc;
+		return ret;
 	}
 
 	ret = input_register_device(haptics->input_dev);
 	if (ret < 0) {
 		dev_err(arizona->dev, "couldn't register input device: %d\n",
 			ret);
-		goto err_iff;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, haptics);
 
 	return 0;
-
-err_iff:
-	if (haptics->input_dev)
-		input_ff_destroy(haptics->input_dev);
-err_ialloc:
-	input_free_device(haptics->input_dev);
-
-	return ret;
-}
-
-static int arizona_haptics_remove(struct platform_device *pdev)
-{
-	struct arizona_haptics *haptics = platform_get_drvdata(pdev);
-
-	input_unregister_device(haptics->input_dev);
-
-	return 0;
 }
 
 static struct platform_driver arizona_haptics_driver = {
 	.probe		= arizona_haptics_probe,
-	.remove		= arizona_haptics_remove,
 	.driver		= {
 		.name	= "arizona-haptics",
 	},
--
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