Input: 88pm860x_onkey - switch to using managed resources

Let's switch the driver to use managed resources, this will simplify
error handling and driver unbinding logic.
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/88pm860x_onkey.c

@@ -26,6 +26,7 @@
 #include <linux/interrupt.h>
 #include <linux/mfd/88pm860x.h>
 #include <linux/slab.h>
+#include <linux/device.h>
 
 #define PM8607_WAKEUP		0x0b
 
@@ -68,7 +69,8 @@ static int pm860x_onkey_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	info = kzalloc(sizeof(struct pm860x_onkey_info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
+			    GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 	info->chip = chip;
@@ -76,11 +78,10 @@ static int pm860x_onkey_probe(struct platform_device *pdev)
 	info->dev = &pdev->dev;
 	info->irq = irq;
 
-	info->idev = input_allocate_device();
+	info->idev = devm_input_allocate_device(&pdev->dev);
 	if (!info->idev) {
 		dev_err(chip->dev, "Failed to allocate input dev\n");
-		ret = -ENOMEM;
-		goto out;
+		return -ENOMEM;
 	}
 
 	info->idev->name = "88pm860x_on";
@@ -93,42 +94,22 @@ static int pm860x_onkey_probe(struct platform_device *pdev)
 	ret = input_register_device(info->idev);
 	if (ret) {
 		dev_err(chip->dev, "Can't register input device: %d\n", ret);
-		goto out_reg;
+		return ret;
 	}
 
-	ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler,
-				   IRQF_ONESHOT, "onkey", info);
+	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+					pm860x_onkey_handler, IRQF_ONESHOT,
+					"onkey", info);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 			info->irq, ret);
-		goto out_irq;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, info);
 	device_init_wakeup(&pdev->dev, 1);
 
 	return 0;
-
-out_irq:
-	input_unregister_device(info->idev);
-	kfree(info);
-	return ret;
-
-out_reg:
-	input_free_device(info->idev);
-out:
-	kfree(info);
-	return ret;
-}
-
-static int pm860x_onkey_remove(struct platform_device *pdev)
-{
-	struct pm860x_onkey_info *info = platform_get_drvdata(pdev);
-
-	free_irq(info->irq, info);
-	input_unregister_device(info->idev);
-	kfree(info);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -161,7 +142,6 @@ static struct platform_driver pm860x_onkey_driver = {
 		.pm	= &pm860x_onkey_pm_ops,
 	},
 	.probe		= pm860x_onkey_probe,
-	.remove		= pm860x_onkey_remove,
 };
 module_platform_driver(pm860x_onkey_driver);