From: Christoph Burger-Scheidlin <andersin@freenet.de>
To: linux-ide@vger.kernel.org
Subject: Re: ide dma bug?
Date: Mon, 5 Sep 2005 12:39:14 +0100 [thread overview]
Message-ID: <200509051239.14713.andersin@freenet.de> (raw)
In-Reply-To: <20050904201844.GA12464@pog.tecnopolis.ca>
On Sunday 04 September 2005 21:18, Trevor Cordes wrote:
> I'm getting a couple of times every couple of days:
>
> Sep 1 07:09:53 piles kernel: hdq: dma_intr: bad DMA status (dma_stat=75)
> Sep 1 07:09:53 piles kernel: hdq: dma_intr: status=0x50 { DriveReady
> SeekComplete } Sep 1 07:09:53 piles kernel: ide: failed opcode was:
> unknown
>
> They're running off of the onboard Intel 845D IDE, onboard Promise PDC20276
> [...] 2 CMD680-based cards. [...] The 8 250's are all IDE masters. The 4
> 160's share 2 IDE channels (master+slave).
I had a similar problem with a SiI680 (and since lspci states that Silicon
Image was formerly CMD Tech. I thought it might be related). In my case, I
got lost interrupts and dma errors when I used both channels of the SiI680
simultaneously. I serialized both channels (kernel parameters ide2=serialize
ide3=serialize) and the problems went away (I am not sure though how much of
a performance impact it has).
If you want more detailed info on my scenario to compare it to yours, please
check bug 5145: http://bugzilla.kernel.org/show_bug.cgi?id=5145 .
Christoph Burger-Scheidlin
next prev parent reply other threads:[~2005-09-05 11:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-04 20:18 ide dma bug? Trevor Cordes
2005-09-05 11:39 ` Christoph Burger-Scheidlin [this message]
2005-09-05 16:00 ` Mark Lord
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