linux-kernel - [PATCH 8/9] extcon: adc-jack: Use devm_extcon_dev_allocate for extcon

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Message-id: <1398072986-17386-9-git-send-email-cw00.choi@samsung.com>
Date:	Mon, 21 Apr 2014 18:36:25 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	myungjoo.ham@...sung.com, gg@...mlogic.co.uk, kishon@...com,
	balbi@...com, ckeepax@...nsource.wolfsonmicro.com,
	broonie@...nel.org, k.kozlowski@...sung.com,
	kyungmin.park@...sung.com, sangjung.woo@...sung.com,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH 8/9] extcon: adc-jack: Use devm_extcon_dev_allocate for
 extcon_dev

This patch use devm_extcon_dev_allocate() to simplify the memory control
of extcon device.

Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
---
 drivers/extcon/extcon-adc-jack.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c
index e23f1c2..56dcf58 100644
--- a/drivers/extcon/extcon-adc-jack.c
+++ b/drivers/extcon/extcon-adc-jack.c
@@ -39,7 +39,7 @@
  * @chan:		iio channel being queried.
  */
 struct adc_jack_data {
-	struct extcon_dev edev;
+	struct extcon_dev *edev;
 
 	const char **cable_names;
 	int num_cables;
@@ -64,7 +64,7 @@ static void adc_jack_handler(struct work_struct *work)
 
 	ret = iio_read_channel_raw(data->chan, &adc_val);
 	if (ret < 0) {
-		dev_err(&data->edev.dev, "read channel() error: %d\n", ret);
+		dev_err(&data->edev->dev, "read channel() error: %d\n", ret);
 		return;
 	}
 
@@ -80,7 +80,7 @@ static void adc_jack_handler(struct work_struct *work)
 	}
 	/* if no def has met, it means state = 0 (no cables attached) */
 
-	extcon_set_state(&data->edev, state);
+	extcon_set_state(data->edev, state);
 }
 
 static irqreturn_t adc_jack_irq_thread(int irq, void *_data)
@@ -102,19 +102,22 @@ static int adc_jack_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
-	data->edev.name = pdata->name;
-
 	if (!pdata->cable_names) {
 		err = -EINVAL;
 		dev_err(&pdev->dev, "error: cable_names not defined.\n");
 		goto out;
 	}
 
-	data->edev.dev.parent = &pdev->dev;
-	data->edev.supported_cable = pdata->cable_names;
+	data->edev = devm_extcon_dev_allocate(&pdev->dev, pdata->cable_names);
+	if (!data->edev) {
+		dev_err(&pdev->dev, "failed to allocate extcon device\n");
+		return -ENOMEM;
+	}
+	data->edev->dev.parent = &pdev->dev;
+	data->edev->name = pdata->name;
 
 	/* Check the length of array and set num_cables */
-	for (i = 0; data->edev.supported_cable[i]; i++)
+	for (i = 0; data->edev->supported_cable[i]; i++)
 		;
 	if (i == 0 || i > SUPPORTED_CABLE_MAX) {
 		err = -EINVAL;
@@ -149,7 +152,7 @@ static int adc_jack_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, data);
 
-	err = extcon_dev_register(&data->edev);
+	err = extcon_dev_register(data->edev);
 	if (err)
 		goto out;
 
@@ -171,7 +174,7 @@ static int adc_jack_probe(struct platform_device *pdev)
 	return 0;
 
 err_irq:
-	extcon_dev_unregister(&data->edev);
+	extcon_dev_unregister(data->edev);
 out:
 	return err;
 }
@@ -182,7 +185,7 @@ static int adc_jack_remove(struct platform_device *pdev)
 
 	free_irq(data->irq, data);
 	cancel_work_sync(&data->handler.work);
-	extcon_dev_unregister(&data->edev);
+	extcon_dev_unregister(data->edev);
 
 	return 0;
 }
-- 
1.8.0

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