Message-ID: <3CBD45BD.4040209@evision-ventures.com>
Date: Wed, 17 Apr 2002 11:51:57 +0200
From: Martin Dalecki <dalecki@evision-ventures.com>
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To: Mikael Pettersson <mikpe@csd.uu.se>
CC: linux-kernel@vger.kernel.org
Subject: Re: 2.5.8 IDE oops (TCQ breakage?)
In-Reply-To: <200204161749.TAA16333@harpo.it.uu.se>
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Sender: linux-kernel-owner@vger.kernel.org

Mikael Pettersson wrote:
> I have a 486 box which ran 2.5.7 fine, but 2.5.8 oopses during
> boot at the BUG_ON() in drivers/ide/ide-disk.c, line 360:
> 
> 	if (drive->using_tcq) {
> 		int tag = ide_get_tag(drive);
> 
> 		BUG_ON(drive->tcq->active_tag != -1);

OK it could be that the tca goesn't get allocated if there
was no chipset selected. Lets have a look...


> 
> Relevant .config is
> # CONFIG_PCI is not set
> CONFIG_IDE=y
> CONFIG_BLK_DEV_IDE=y
> CONFIG_BLK_DEV_IDEDISK=y
> CONFIG_IDEDISK_MULTI_MODE=y
> (That's it. No chipset support selected; neither I nor Linux
> has ever detected any known IDE chipset in this box...)
> 
> Why is drive->using_tcq non-zero when CONFIG_BLK_DEV_IDE_TCQ=n
> and the disk is an early/mid-90s 500MB WD drive?
> 
> /Mikael
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