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From: linas@austin.ibm.com (Linas Vepstas)
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [BUG] ide dma_timer_expiry, then hard lockup
Date: Mon, 18 Jun 2007 15:46:01 -0500	[thread overview]
Message-ID: <20070618204601.GF5836@austin.ibm.com> (raw)
In-Reply-To: <20070618212704.394912b8@the-village.bc.nu>

On Mon, Jun 18, 2007 at 09:27:04PM +0100, Alan Cox wrote:
> > ide_dma_timeout_retry() in ide-io.c 
> >   prints the "hdc: DMA Timeout error" then calls
> >   HWIF(drive)->ide_dma_end(drive);
> >     which returns, and then calls 
> >   hwif->INB(IDE_STATUS_REG) which is needed as an argument to ide_error()
> > 
> > But this hangs! -- The INB never returns.
> > Now:  hwif->INB = ide_inb; in ide-iops.c
> 
> Yep and the I/O cycle never completes so the box hangs. This occurs if
> the drive blows up and never switches IORDY to indicate completion. The
> hpt will also do this sometimes if it gets addled by a confused drive,
> while an intel one often won't.

So what do you suggest? (I could buy an alternate ide controller,
and hope that goes away, or just buy a different hard drive. But
that's beside the point).

I can prepare a patch, but only with a lot of guidance. I can test 
& debug, I'm highly motivated just right now ... 

--linas

  reply	other threads:[~2007-06-18 20:46 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-18 17:57 [BUG] ide dma_timer_expiry, then hard lockup Linas Vepstas
2007-06-18 18:11 ` Stuart_Hayes
2007-06-19 14:07   ` Sergei Shtylyov
2007-06-19 15:05     ` Linas Vepstas
2007-06-19 16:10       ` Sergei Shtylyov
2007-06-19 16:48         ` Linas Vepstas
2007-06-19 18:43           ` Bartlomiej Zolnierkiewicz
2007-06-19 20:07             ` Sergei Shtylyov
2007-06-20 16:28               ` Linas Vepstas
2007-06-20 17:01                 ` Alan Cox
2007-06-21 17:58                   ` Sergei Shtylyov
2007-06-21 21:41                     ` Alan Cox
2007-06-21 19:47                   ` Linas Vepstas
2007-06-21 22:04                     ` Alan Cox
2007-06-18 20:27 ` Alan Cox
2007-06-18 20:46   ` Linas Vepstas [this message]
2007-06-18 21:04     ` Alan Cox
2007-06-18 21:22       ` Linas Vepstas
2007-06-19 14:56         ` bug in libata [was " Linas Vepstas
2007-06-19 14:10       ` Sergei Shtylyov
2007-06-19 14:19         ` Alan Cox
2007-06-19 14:24           ` Sergei Shtylyov
2007-06-19 15:38             ` Mark Lord
2007-06-19 15:51               ` Sergei Shtylyov
2007-06-19 16:17               ` Alan Cox
2007-06-19 16:32                 ` Sergei Shtylyov
2007-06-22 15:39 ` Sergei Shtylyov
2007-06-29 18:52   ` Sergei Shtylyov

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