linux-kernel - Re: [boot crash, bisected] in 9f240a55 "ALSA: opti93x: use cs4231 lib"

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Message-ID: <48808EEC.3000409@keyaccess.nl>
Date:	Fri, 18 Jul 2008 14:39:08 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Krzysztof Helt <krzysztof.h1@...zta.fm>
CC:	Takashi Iwai <tiwai@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Jaroslav Kysela <perex@...ex.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	ALSA development <alsa-devel@...a-project.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Rene Herman <rene.herman@...il.com>,
	Krzysztof Helt <krzysztof.h1@...pl>
Subject: Re: [boot crash, bisected] in 9f240a55 "ALSA: opti93x: use cs4231
 lib"

On 18-07-08 14:36, Rene Herman wrote:

> On 18-07-08 14:28, Krzysztof Helt wrote:
> 
>> On Fri, 18 Jul 2008 11:19:19 +0200
>> Rene Herman <rene.herman@...access.nl> wrote:
>>
>>> On 17-07-08 21:38, Rene Herman wrote:
>>>
>>>> On 17-07-08 21:20, Rene Herman wrote:
>>>>
>>>>> On 17-07-08 20:40, Takashi Iwai wrote:
>>>>>
>>>>>> Could you try the patch below?
>>> This bug was uncovered by !CONFIG_PNP and we had trouble in this 
>>> driver due to that before so was rewriting the init to be a generic 
>>> multi-card ALSA init but, actually, not much point.
>>>
>>
>> The bug was introduced by the patch as it used (tried to free) the 
>> codec pointer
>> before it was assigned any value. It happened only if the card was 
>> missing and
>> I didn't test the driver on such a configuration. My mistake. The 
>> CONFIG_PNP
>> setting makes no difference.
> 
> Yes it does. Note how the ISA match method fails due to "if (isapnp)" 
> with CONFIG_PNP and isapnp being initialized to 1. I did test without 
> the hardware but didn't see it fail due to that.

(but please note, yes, "uncovered", not "caused". the bug was indeed in 
this commit and was fixed by Takashi).

Rene.

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