linux-kernel - [PATCH 13/25] leds: convert Sun Fire LED driver to devm

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Date:	Wed,  4 Jul 2012 13:10:05 +0800
From:	Bryan Wu <bryan.wu@...onical.com>
To:	linux-leds@...r.kernel.org, rpurdie@...ys.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 13/25] leds: convert Sun Fire LED driver to devm_kzalloc() and cleanup error exit path

Cc: David S. Miller <davem@...emloft.net>
Signed-off-by: Bryan Wu <bryan.wu@...onical.com>
---
 drivers/leds/leds-sunfire.c |   21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/leds/leds-sunfire.c b/drivers/leds/leds-sunfire.c
index 1757396..134d9a4 100644
--- a/drivers/leds/leds-sunfire.c
+++ b/drivers/leds/leds-sunfire.c
@@ -132,15 +132,13 @@ static int __devinit sunfire_led_generic_probe(struct platform_device *pdev,
 	if (pdev->num_resources != 1) {
 		printk(KERN_ERR PFX "Wrong number of resources %d, should be 1\n",
 		       pdev->num_resources);
-		err = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 
-	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
 	if (!p) {
 		printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n");
-		err = -ENOMEM;
-		goto out;
+		return -ENOMEM;
 	}
 
 	for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
@@ -156,20 +154,15 @@ static int __devinit sunfire_led_generic_probe(struct platform_device *pdev,
 		if (err) {
 			printk(KERN_ERR PFX "Could not register %s LED\n",
 			       lp->name);
-			goto out_unregister_led_cdevs;
+			for (i--; i >= 0; i--)
+				led_classdev_unregister(&p->leds[i].led_cdev);
+			return err;
 		}
 	}
 
 	dev_set_drvdata(&pdev->dev, p);
 
 	return 0;
-
-out_unregister_led_cdevs:
-	for (i--; i >= 0; i--)
-		led_classdev_unregister(&p->leds[i].led_cdev);
-	kfree(p);
-out:
-	return err;
 }
 
 static int __devexit sunfire_led_generic_remove(struct platform_device *pdev)
@@ -180,8 +173,6 @@ static int __devexit sunfire_led_generic_remove(struct platform_device *pdev)
 	for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
 		led_classdev_unregister(&p->leds[i].led_cdev);
 
-	kfree(p);
-
 	return 0;
 }
 
-- 
1.7.10.4

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