diff mbox

[v2,3/4] Input: twl6040-vibra: Code cleanup in probe with devm_* conversion

Message ID 1357896483-20764-4-git-send-email-peter.ujfalusi@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Ujfalusi Jan. 11, 2013, 9:28 a.m. UTC 
Convert the probe to use devm_*. At the same time reorder the calls
so we will register the input device as the last step when the driver
is loaded.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/input/misc/twl6040-vibra.c | 102 ++++++++++++++++---------------------
 1 file changed, 45 insertions(+), 57 deletions(-)

Comments

Dmitry Torokhov Jan. 11, 2013, 5:04 p.m. UTC | #1 
Hi Peter,

On Fri, Jan 11, 2013 at 10:28:02AM +0100, Peter Ujfalusi wrote:
> @@ -422,11 +413,8 @@ static int twl6040_vibra_remove(struct platform_device *pdev)
>  {
>  	struct vibra_info *info = platform_get_drvdata(pdev);
>  
> -	input_unregister_device(info->input_dev);
> -	free_irq(info->irq, info);
>  	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
>  	destroy_workqueue(info->workqueue);
> -	kfree(info);
>  


I do not think we can switch to managed resources while using
non-managed version of regulator_bulk_get, because with this patch you
shutting down regulators (presumably making device inoperable) while
the input device and interrupt are alive and kicking. BTW, the wq patch
should have been before this one in the queue as again you can't
destroy work queue while input device is active.

I see 3 ways here:

1. Change regulator core to allow separate owner device from the device
the resource is attached to.

2. Create custom version of devm_regulator_bulk_get() and use it in
twl6040.

3. Keep the resources unmanaged.

Unless there are many drivers like twl6040 to justify 1 I'd go with 3.

Thanks.
diff mbox

Patch

diff --git a/drivers/input/misc/twl6040-vibra.c b/drivers/input/misc/twl6040-vibra.c
index 71a28ee..f6c0f58 100644
--- a/drivers/input/misc/twl6040-vibra.c
+++ b/drivers/input/misc/twl6040-vibra.c
@@ -275,7 +275,7 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info) {
 		dev_err(&pdev->dev, "couldn't allocate memory\n");
 		return -ENOMEM;
@@ -309,53 +309,23 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 	if ((!info->vibldrv_res && !info->viblmotor_res) ||
 	    (!info->vibrdrv_res && !info->vibrmotor_res)) {
 		dev_err(info->dev, "invalid vibra driver/motor resistance\n");
-		ret = -EINVAL;
-		goto err_kzalloc;
+		return -EINVAL;
 	}
 
 	info->irq = platform_get_irq(pdev, 0);
 	if (info->irq < 0) {
 		dev_err(info->dev, "invalid irq\n");
-		ret = -EINVAL;
-		goto err_kzalloc;
+		return -EINVAL;
 	}
 
 	mutex_init(&info->mutex);
 
-	info->input_dev = input_allocate_device();
-	if (info->input_dev == NULL) {
-		dev_err(info->dev, "couldn't allocate input device\n");
-		ret = -ENOMEM;
-		goto err_kzalloc;
-	}
-
-	input_set_drvdata(info->input_dev, info);
-
-	info->input_dev->name = "twl6040:vibrator";
-	info->input_dev->id.version = 1;
-	info->input_dev->dev.parent = pdev->dev.parent;
-	info->input_dev->close = twl6040_vibra_close;
-	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
-
-	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
-	if (ret < 0) {
-		dev_err(info->dev, "couldn't register vibrator to FF\n");
-		goto err_ialloc;
-	}
-
-	ret = input_register_device(info->input_dev);
-	if (ret < 0) {
-		dev_err(info->dev, "couldn't register input device\n");
-		goto err_iff;
-	}
-
-	platform_set_drvdata(pdev, info);
-
-	ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
-				   "twl6040_irq_vib", info);
+	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+					twl6040_vib_irq_handler, 0,
+					"twl6040_irq_vib", info);
 	if (ret) {
 		dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
-		goto err_irq;
+		return ret;
 	}
 
 	info->supplies[0].supply = "vddvibl";
@@ -368,7 +338,7 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 				 ARRAY_SIZE(info->supplies), info->supplies);
 	if (ret) {
 		dev_err(info->dev, "couldn't get regulators %d\n", ret);
-		goto err_regulator;
+		return ret;
 	}
 
 	if (vddvibl_uV) {
@@ -377,7 +347,7 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
 				ret);
-			goto err_voltage;
+			goto err_regulator;
 		}
 	}
 
@@ -387,7 +357,7 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
 				ret);
-			goto err_voltage;
+			goto err_regulator;
 		}
 	}
 
@@ -395,26 +365,47 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 	if (info->workqueue == NULL) {
 		dev_err(info->dev, "couldn't create workqueue\n");
 		ret = -ENOMEM;
-		goto err_voltage;
+		goto err_regulator;
 	}
 	INIT_WORK(&info->play_work, vibra_play_work);
 
+	info->input_dev = devm_input_allocate_device(&pdev->dev);
+	if (info->input_dev == NULL) {
+		dev_err(info->dev, "couldn't allocate input device\n");
+		ret = -ENOMEM;
+		goto err_wq;
+	}
+
+	input_set_drvdata(info->input_dev, info);
+
+	info->input_dev->name = "twl6040:vibrator";
+	info->input_dev->id.version = 1;
+	info->input_dev->dev.parent = pdev->dev.parent;
+	info->input_dev->close = twl6040_vibra_close;
+	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
+
+	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
+	if (ret < 0) {
+		dev_err(info->dev, "couldn't register vibrator to FF\n");
+		goto err_wq;
+	}
+
+	ret = input_register_device(info->input_dev);
+	if (ret < 0) {
+		dev_err(info->dev, "couldn't register input device\n");
+		goto err_iff;
+	}
+
+	platform_set_drvdata(pdev, info);
+
 	return 0;
 
-err_voltage:
-	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
-err_regulator:
-	free_irq(info->irq, info);
-err_irq:
-	input_unregister_device(info->input_dev);
-	info->input_dev = NULL;
 err_iff:
-	if (info->input_dev)
-		input_ff_destroy(info->input_dev);
-err_ialloc:
-	input_free_device(info->input_dev);
-err_kzalloc:
-	kfree(info);
+	input_ff_destroy(info->input_dev);
+err_wq:
+	destroy_workqueue(info->workqueue);
+err_regulator:
+	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
 	return ret;
 }
 
@@ -422,11 +413,8 @@  static int twl6040_vibra_remove(struct platform_device *pdev)
 {
 	struct vibra_info *info = platform_get_drvdata(pdev);
 
-	input_unregister_device(info->input_dev);
-	free_irq(info->irq, info);
 	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
 	destroy_workqueue(info->workqueue);
-	kfree(info);
 
 	return 0;
 }