linux-kernel - [PATCH] hwmon/coretemp: Fix a broken error path

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Message-ID: <20070616231745.1b0f7bd9@hyperion.delvare>
Date:	Sat, 16 Jun 2007 23:17:45 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Soeren Sonnenburg <kernel@....de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Rudolf Marek <r.marek@...embler.cz>
Subject: [PATCH] hwmon/coretemp: Fix a broken error path

Hi Soeren,

On Sat, 16 Jun 2007 22:43:05 +0200, Soeren Sonnenburg wrote:
> this commit makes coretemp fail on my macbook pro.
> 
> 1) rmmod oopses (see below)
> 2) it breaks s2ram
> 
> Soeren
> 
> commit 67f363b1f6a31cf5027a97372f64bcced4f05ba6
> Author: Rudolf Marek <r.marek@...embler.cz>
> Date:   Sun May 27 22:17:43 2007 +0200
> 
>     hwmon/coretemp: Add more safety checks
> 
>     Add detection of AE18 Errata of Core processor and warns
>     users that the absolute readings might be wrong for Core2 processor.
> 
>     Signed-off-by: Rudolf Marek <r.marek@...embler.cz>Subject: hwmon/coretemp: Fix a broken error path
>     Signed-off-by: Jean Delvare <khali@...ux-fr.org>


Thanks for reporting. Indeed this patch is broken, sorry for
overlooking it. I tested it but my hardware is such that the faulty
error path was never taken. Please test the following patch (on top of
git-current) and confirm it fixes your problem:

Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Cc: Rudolf Marek <r.marek@...embler.cz>
---
 drivers/hwmon/coretemp.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-2.6.22-rc4.orig/drivers/hwmon/coretemp.c	2007-06-05 10:25:54.000000000 +0200
+++ linux-2.6.22-rc4/drivers/hwmon/coretemp.c	2007-06-16 23:14:06.000000000 +0200
@@ -185,6 +185,7 @@ static int __devinit coretemp_probe(stru
 		/* check for microcode update */
 		rdmsr_on_cpu(data->id, MSR_IA32_UCODE_REV, &eax, &edx);
 		if (edx < 0x39) {
+			err = -ENODEV;
 			dev_err(&pdev->dev,
 				"Errata AE18 not fixed, update BIOS or "
 				"microcode of the CPU!\n");


Thanks,
-- 
Jean Delvare
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