linux-kernel - [PATCH 4/8] extcon: max14577: Use devm_extcon_dev

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Message-id: <1397644023-32516-5-git-send-email-sangjung.woo@samsung.com>
Date:	Wed, 16 Apr 2014 19:26:59 +0900
From:	Sangjung Woo <sangjung.woo@...sung.com>
To:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	linux-kernel@...r.kernel.org,
	Sangjung Woo <sangjung.woo@...sung.com>
Subject: [PATCH 4/8] extcon: max14577: Use devm_extcon_dev_register()

Use the resource-managed extcon device register function (i.e.
devm_extcon_dev_register()) instead of extcon_dev_register(). If extcon device
is attached with this function, that extcon device is automatically unregistered
on driver detach. That reduces tiresome managing code.

Signed-off-by: Sangjung Woo <sangjung.woo@...sung.com>
---
 drivers/extcon/extcon-max14577.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c
index 1fef08d..c6166e7 100644
--- a/drivers/extcon/extcon-max14577.c
+++ b/drivers/extcon/extcon-max14577.c
@@ -675,7 +675,7 @@ static int max14577_muic_probe(struct platform_device *pdev)
 	}
 	info->edev->name = DEV_NAME;
 	info->edev->supported_cable = max14577_extcon_cable;
-	ret = extcon_dev_register(info->edev);
+	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register extcon device\n");
 		return ret;
@@ -694,7 +694,7 @@ static int max14577_muic_probe(struct platform_device *pdev)
 			MAX14577_REG_DEVICEID, &id);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to read revision number\n");
-		goto err_extcon;
+		return ret;
 	}
 	dev_info(info->dev, "device ID : 0x%x\n", id);
 
@@ -714,10 +714,6 @@ static int max14577_muic_probe(struct platform_device *pdev)
 			delay_jiffies);
 
 	return ret;
-
-err_extcon:
-	extcon_dev_unregister(info->edev);
-	return ret;
 }
 
 static int max14577_muic_remove(struct platform_device *pdev)
@@ -725,7 +721,6 @@ static int max14577_muic_remove(struct platform_device *pdev)
 	struct max14577_muic_info *info = platform_get_drvdata(pdev);
 
 	cancel_work_sync(&info->irq_work);
-	extcon_dev_unregister(info->edev);
 
 	return 0;
 }
-- 
1.7.9.5

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