Input: max8925_onkey :Allocate resources using managed interfaces

This patch moves most data allocated in the probe function from unmanaged interfaces to managed interfaces. The kfrees and error handling code is done away with. The unnecesary labels are removed and the function max8925_onkey_remove is removed as it becomes empty after removing the no longer required function calls. Also, linux/device.h is added to make sure the devm_*() routine declarations are unambiguously available.

The following Coccinelle semantic patch was used for making a part of the change:

@platform@
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};

@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}

@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}

Signed-off-by Himangi Saraogi <[email protected]>

Acked-by Julia Lawall <[email protected]>

---
To send to: Dmitry Torokhov <[email protected]>,[email protected],[email protected]

 drivers/input/misc/max8925_onkey.c | 52 +++++++++++---------------------------
 1 file changed, 15 insertions(+), 37 deletions(-)

drivers/input/misc/max8925_onkey.c +15 -37

index eef41cf..62899e5 100644
@@ -26,6 +26,7 @@
 #include <linux/interrupt.h>
 #include <linux/mfd/max8925.h>
 #include <linux/slab.h>
+#include <linux/device.h>
 
 #define SW_INPUT		(1 << 7)	/* 0/1 -- up/down */
 #define HARDRESET_EN		(1 << 7)

@@ -81,12 +82,11 @@ static int max8925_onkey_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	info = kzalloc(sizeof(struct max8925_onkey_info), GFP_KERNEL);
-	input = input_allocate_device();
-	if (!info || !input) {
-		error = -ENOMEM;
-		goto err_free_mem;
-	}
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_onkey_info),
+			    GFP_KERNEL);
+	input = devm_input_allocate_device(&pdev->dev);
+	if (!info || !input)
+		return -ENOMEM;
 
 	info->idev = input;
 	info->i2c = chip->i2c;

@@ -100,55 +100,34 @@ static int max8925_onkey_probe(struct platform_device *pdev)
 	input->dev.parent = &pdev->dev;
 	input_set_capability(input, EV_KEY, KEY_POWER);
 
-	error = request_threaded_irq(irq[0], NULL, max8925_onkey_handler,
-				     IRQF_ONESHOT, "onkey-down", info);
+	error = devm_request_threaded_irq(&pdev->dev, irq[0], NULL,
+					  max8925_onkey_handler, IRQF_ONESHOT,
+					  "onkey-down", info);
 	if (error < 0) {
 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 			irq[0], error);
-		goto err_free_mem;
+		return error;
 	}
 
-	error = request_threaded_irq(irq[1], NULL, max8925_onkey_handler,
-				     IRQF_ONESHOT, "onkey-up", info);
+	error = devm_request_threaded_irq(&pdev->dev, irq[1], NULL,
+					  max8925_onkey_handler, IRQF_ONESHOT,
+					  "onkey-up", info);
 	if (error < 0) {
 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
 			irq[1], error);
-		goto err_free_irq0;
+		return error;
 	}
 
 	error = input_register_device(info->idev);
 	if (error) {
 		dev_err(chip->dev, "Can't register input device: %d\n", error);
-		goto err_free_irq1;
+		return error;
 	}
 
 	platform_set_drvdata(pdev, info);
 	device_init_wakeup(&pdev->dev, 1);
 
 	return 0;
-
-err_free_irq1:
-	free_irq(irq[1], info);
-err_free_irq0:
-	free_irq(irq[0], info);
-err_free_mem:
-	input_free_device(input);
-	kfree(info);
-
-	return error;
-}
-
-static int max8925_onkey_remove(struct platform_device *pdev)
-{
-	struct max8925_onkey_info *info = platform_get_drvdata(pdev);
-	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
-
-	free_irq(info->irq[0] + chip->irq_base, info);
-	free_irq(info->irq[1] + chip->irq_base, info);
-	input_unregister_device(info->idev);
-	kfree(info);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

@@ -190,7 +169,6 @@ static struct platform_driver max8925_onkey_driver = {
 		.pm	= &max8925_onkey_pm_ops,
 	},
 	.probe		= max8925_onkey_probe,
-	.remove		= max8925_onkey_remove,
 };
 module_platform_driver(max8925_onkey_driver);
 

Signature · 1 line

1.9.1