linux-kernel - [ 37/38] hwmon: (w83627ehf) Fix memory leak in probe function

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Date:	Fri, 16 Mar 2012 16:35:24 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <khali@...ux-fr.org>
Subject: [ 37/38] hwmon: (w83627ehf) Fix memory leak in probe function

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Guenter Roeck <linux@...ck-us.net>

commit 32260d94408c553dca4ce54104edf79941a27536 upstream.

The driver probe function leaked memory if creating the cpu0_vid attribute file
failed. Fix by converting the driver to use devm_kzalloc.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Acked-by: Jean Delvare <khali@...ux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwmon/w83627ehf.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -1823,7 +1823,8 @@ static int __devinit w83627ehf_probe(str
 		goto exit;
 	}
 
-	data = kzalloc(sizeof(struct w83627ehf_data), GFP_KERNEL);
+	data = devm_kzalloc(&pdev->dev, sizeof(struct w83627ehf_data),
+			    GFP_KERNEL);
 	if (!data) {
 		err = -ENOMEM;
 		goto exit_release;
@@ -2319,9 +2320,8 @@ static int __devinit w83627ehf_probe(str
 
 exit_remove:
 	w83627ehf_device_remove_files(dev);
-	kfree(data);
-	platform_set_drvdata(pdev, NULL);
 exit_release:
+	platform_set_drvdata(pdev, NULL);
 	release_region(res->start, IOREGION_LENGTH);
 exit:
 	return err;
@@ -2335,7 +2335,6 @@ static int __devexit w83627ehf_remove(st
 	w83627ehf_device_remove_files(&pdev->dev);
 	release_region(data->addr, IOREGION_LENGTH);
 	platform_set_drvdata(pdev, NULL);
-	kfree(data);
 
 	return 0;
 }


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