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Date: Mon, 6 Jan 2003 16:00:06 -0500
Message-Id: <200301062100.h06L06V03070@buggy.badula.org>
From: Ion Badulescu <ionut@cs.columbia.edu>
To: "Justin T. Gibbs" <gibbs@scsiguy.com>
Cc: Paul Rolland <rol@witbe.net>, linux-kernel@vger.kernel.org
Subject: Re: [2.5.54] Oops IDE-SCSI and failure AIC7xxx
In-Reply-To: <418420000.1041781806@aslan.scsiguy.com>
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On Sun, 05 Jan 2003 08:50:06 -0700, Justin T. Gibbs <gibbs@scsiguy.com> wrote:
>> Out of this, two problems :
>>  - AIC7xxx fails to use DMA, with :
>> aic7xxx: PCI Device 0:8:0 failed memory mapped test.  Using PIO.
>> scsi0: PCI error Interrupt at seqaddr = 0x3
>> scsi0: Signaled a Target Abort
> 
> This is because your system is violating the PCI spec.  There is
> now an explicit test for this during driver initialization so that
> the driver doesn't unexpectedly fail later.  I can change the driver
> so that it doesn't print out the diagnostic if it would make you
> feel better. 8-)

The problem with the message is that it makes people think PIO vs DMA
(which matters a lot for e.g. IDE), not PIO vs MMIO which is what it
really is, and doesn't matter nearly as much.

Ion

-- 
  It is better to keep your mouth shut and be thought a fool,
            than to open it and remove all doubt.
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