linux-kernel - [34-longterm 166/247] hwmon/f71882fg: Set platform drvdata to NULL later

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Message-Id: <1308850515-15242-107-git-send-email-paul.gortmaker@windriver.com>
Date:	Thu, 23 Jun 2011 13:33:54 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Hans de Goede <hdegoede@...hat.com>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 166/247] hwmon/f71882fg: Set platform drvdata to NULL later

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

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.
                   -------------------

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: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 drivers/hwmon/f71882fg.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index a95fa42..03f08b2 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -2031,7 +2031,6 @@ static int f71882fg_remove(struct platform_device *pdev)
 	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);
 
@@ -2098,6 +2097,7 @@ static int f71882fg_remove(struct platform_device *pdev)
 		}
 	}
 
+	platform_set_drvdata(pdev, NULL);
 	kfree(data);
 
 	return 0;
-- 
1.7.4.4

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