linux-kernel - [30/45] hwmon: (coretemp) Fix oops on CPU offlining

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Message-Id: <20111216194211.684013527@clark.kroah.org>
Date:	Fri, 16 Dec 2011 11:40:37 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	stable@...nel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Guenter Roeck <guenter.roeck@...csson.com>,
	Greg KH <greg@...ah.com>, Jean Delvare <khali@...ux-fr.org>,
	Durgadoss R <durgadoss.r@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>
Subject: [30/45] hwmon: (coretemp) Fix oops on CPU offlining

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

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

This is for stable kernel branch 3.0 only. Previous and later versions
have different code paths and are not affected by this bug.

This is the same fix as "hwmon: (coretemp) Fix oops on driver load"
but for the CPU offlining case. Sorry for missing it at first.

Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Cc: Durgadoss R <durgadoss.r@...el.com>
Acked-by: Guenter Roeck <guenter.roeck@...csson.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/hwmon/coretemp.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -747,6 +747,8 @@ static void __cpuinit put_core_offline(u
 		return;
 
 	pdata = platform_get_drvdata(pdev);
+	if (!pdata)
+		return;
 
 	indx = TO_ATTR_NO(cpu);
 


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