Subject: Bug in promise_new ide conteroller (was: Re: [BUG] PDC20268
	crashing during DMA setup on stock Debian 2.6.12-1-powerpc)
From: Kasper Sandberg <lkml@metanurb.dk>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kyle Moffett <mrmacman_g4@mac.com>, Andrew Morton <akpm@osdl.org>,
       Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>,
       LKML Kernel <linux-kernel@vger.kernel.org>
In-Reply-To: <1132520441.6052.41.camel@gaston>
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Date: Mon, 21 Nov 2005 22:21:25 +0100
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i have a promise controller and it fails too, but only some times (never
during startup).. i get the following errors:
hdf: dma_intr: bad DMA status (dma_stat=75)
hdf: dma_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdf: dma_timer_expiry: dma status == 0x60
hdf: DMA timeout retry
PDC202XX: Primary channel reset.
hdf: timeout waiting for DMA

and i know for a fact it isnt the indidual controller, as i tried with 2
other brand new ones, and i know it isnt the drives/cables/computer,
since i tried switching it all around, and it keeps happening.

if it does this while reading/writing the system hardlocks..


i wrote promise technical support, which said it could be caused by
sharing interrupts, so i checked, and it did share with my NIC, so i
switched to another pci slot, and now it has its own interrupt, YET it
still keeps doing this..

i would greatly apreciate any help

On Mon, 2005-11-21 at 08:00 +1100, Benjamin Herrenschmidt wrote:
> > This is the only possibility that I can think of, but I'm having a  
> > hard time getting enough lines of pre-BUG output.  Is there any way  
> > to turn off the BUG() lines and just show the printks before that point?
> 
> There is a patch from Thibault that fixes it, it should be in 2.6.15-rc2
> 
> Ben.
> 
> 
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