linux-kernel - [PATCH 16/22] backlight: lp855x: use devm_backlight_device

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Date:	Tue, 24 Sep 2013 18:17:17 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, 'Richard Purdie' <rpurdie@...ys.net>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 16/22] backlight: lp855x: use devm_backlight_device_register()

Use devm_backlight_device_register() to make cleanup paths simpler.
Also, unnecessary lp855x_backlight_unregister() is removed.

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/video/backlight/lp855x_bl.c |   20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index 57f005a..cae80d5 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -300,7 +300,7 @@ static int lp855x_backlight_register(struct lp855x *lp)
 
 	props.brightness = pdata->initial_brightness;
 
-	bl = backlight_device_register(name, lp->dev, lp,
+	bl = devm_backlight_device_register(lp->dev, name, lp->dev, lp,
 				       &lp855x_bl_ops, &props);
 	if (IS_ERR(bl))
 		return PTR_ERR(bl);
@@ -310,12 +310,6 @@ static int lp855x_backlight_register(struct lp855x *lp)
 	return 0;
 }
 
-static void lp855x_backlight_unregister(struct lp855x *lp)
-{
-	if (lp->bl)
-		backlight_device_unregister(lp->bl);
-}
-
 static ssize_t lp855x_get_chip_id(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
@@ -439,29 +433,24 @@ static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	ret = lp855x_configure(lp);
 	if (ret) {
 		dev_err(lp->dev, "device config err: %d", ret);
-		goto err_dev;
+		return ret;
 	}
 
 	ret = lp855x_backlight_register(lp);
 	if (ret) {
 		dev_err(lp->dev,
 			"failed to register backlight. err: %d\n", ret);
-		goto err_dev;
+		return ret;
 	}
 
 	ret = sysfs_create_group(&lp->dev->kobj, &lp855x_attr_group);
 	if (ret) {
 		dev_err(lp->dev, "failed to register sysfs. err: %d\n", ret);
-		goto err_sysfs;
+		return ret;
 	}
 
 	backlight_update_status(lp->bl);
 	return 0;
-
-err_sysfs:
-	lp855x_backlight_unregister(lp);
-err_dev:
-	return ret;
 }
 
 static int lp855x_remove(struct i2c_client *cl)
@@ -471,7 +460,6 @@ static int lp855x_remove(struct i2c_client *cl)
 	lp->bl->props.brightness = 0;
 	backlight_update_status(lp->bl);
 	sysfs_remove_group(&lp->dev->kobj, &lp855x_attr_group);
-	lp855x_backlight_unregister(lp);
 
 	return 0;
 }
-- 
1.7.10.4


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