linux-kernel - [PATCH 079/173] hwmon/f71882fg: Set platform drvdata to NULL later

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Message-Id: <20110425200236.428096148@pcw.home.local>
Date:	Mon, 25 Apr 2011 22:03:51 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org
Cc:	Hans de Goede <hdegoede@...hat.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 079/173] hwmon/f71882fg: Set platform drvdata to NULL later

2.6.27.59-stable review patch.  If anyone has any objections, please let us know.

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

From: Hans de Goede <hdegoede@...hat.com>

commit d9ebaa45472c92704f4814682eec21455edcfa1f upstream.

This avoids a possible race leading to trying to dereference NULL.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Acked-by: Jean Delvare <khali@...ux-fr.org>
Signed-off-by: Guenter Roeck <guenter.roeck@...csson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/hwmon/f71882fg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: longterm-2.6.27/drivers/hwmon/f71882fg.c
===================================================================
--- longterm-2.6.27.orig/drivers/hwmon/f71882fg.c	2011-01-23 10:52:16.000000000 +0100
+++ longterm-2.6.27/drivers/hwmon/f71882fg.c	2011-04-25 15:34:40.461278503 +0200
@@ -808,7 +808,6 @@
 	int i;
 	struct f71882fg_data *data = platform_get_drvdata(pdev);
 
-	platform_set_drvdata(pdev, NULL);
 	hwmon_device_unregister(data->hwmon_dev);
 
 	for (i = 0; i < ARRAY_SIZE(f71882fg_dev_attr); i++)
@@ -821,6 +820,7 @@
 	for (i = 0; i < ARRAY_SIZE(f71882fg_fan_attr); i++)
 		device_remove_file(&pdev->dev, &f71882fg_fan_attr[i].dev_attr);
 
+	platform_set_drvdata(pdev, NULL);
 	kfree(data);
 
 	return 0;


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