linux-kernel - [01/87] hwmon/f71882fg: Set platform drvdata to NULL later

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Message-Id: <20110321230709.257505289@clark.kroah.org>
Date:	Mon, 21 Mar 2011 16:06:00 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Hans de Goede <hdegoede@...hat.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <guenter.roeck@...csson.com>
Subject: [01/87] hwmon/f71882fg: Set platform drvdata to NULL later

2.6.37-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(-)

--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -2110,7 +2110,6 @@ static int f71882fg_remove(struct platfo
 	int nr_fans = (data->type == f71882fg) ? 4 : 3;
 	u8 start_reg = f71882fg_read8(data, F71882FG_REG_START);
 
-	platform_set_drvdata(pdev, NULL);
 	if (data->hwmon_dev)
 		hwmon_device_unregister(data->hwmon_dev);
 
@@ -2177,6 +2176,7 @@ static int f71882fg_remove(struct platfo
 		}
 	}
 
+	platform_set_drvdata(pdev, NULL);
 	kfree(data);
 
 	return 0;


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