linux-kernel - Re: [PATCH]: PCI Error Recovery: Symbios SCSI device driver

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Message-ID: <20061102044633.GB23840@colo.lackof.org>
Date:	Wed, 1 Nov 2006 21:46:33 -0700
From:	Grant Grundler <grundler@...isc-linux.org>
To:	Linas Vepstas <linas@...tin.ibm.com>
Cc:	Matthew Wilcox <matthew@....cx>, linux-scsi@...r.kernel.org,
	linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]: PCI Error Recovery: Symbios SCSI device driver

On Tue, Oct 31, 2006 at 05:13:34PM -0600, Linas Vepstas wrote:
...
> > Though, since INB and INW will return 0xff and 0xffff, why not use that
> > as our test rather than using a counter?
> 
> Right. I wanted to avoid checking for specific values, 
> as that vaguely seemed more robust; the direct check is easier.

ISTR some chipsets return 0 or the most recent data on the bus
when INB/INW master-abort.  Maybe this an ISA bus behavior?

Or is config space access the only space which behaves this way
for master abort on PCI?
I'm looking at drivers/pci/probe.c:pci_scan_device().

thanks,
grant
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