linux-kernel - [PATCH] 88pm860x_bl: fix error handling in pm860x_backlight

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Date:	Mon, 10 May 2010 09:29:58 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Richard Purdie <rpurdie@...ux.intel.com>
Subject: [PATCH] 88pm860x_bl: fix error handling in pm860x_backlight_probe

This patch includes below fixes:
1. fixes a memory leak by kfree(data) in the case of data->port < 0.
2. properly unregisters a previously registered backlight device object
in error handling

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/video/backlight/88pm860x_bl.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/video/backlight/88pm860x_bl.c
b/drivers/video/backlight/88pm860x_bl.c
index 68d2518..38ffc3f 100644
--- a/drivers/video/backlight/88pm860x_bl.c
+++ b/drivers/video/backlight/88pm860x_bl.c
@@ -222,6 +222,7 @@ static int pm860x_backlight_probe(struct
platform_device *pdev)
 	data->port = __check_device(pdata, name);
 	if (data->port < 0) {
 		dev_err(&pdev->dev, "wrong platform data is assigned");
+		kfree(data);
 		return -EINVAL;
 	}
 
@@ -266,6 +267,7 @@ static int pm860x_backlight_probe(struct
platform_device *pdev)
 	backlight_update_status(bl);
 	return 0;
 out:
+	backlight_device_unregister(bl);
 	kfree(data);
 	return ret;
 }
-- 
1.5.4.3



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