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

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Message-ID: <20061102045634.GB31830@parisc-linux.org>
Date:	Wed, 1 Nov 2006 21:56:34 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Grant Grundler <grundler@...isc-linux.org>
Cc:	Linas Vepstas <linas@...tin.ibm.com>, 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 Wed, Nov 01, 2006 at 09:46:33PM -0700, Grant Grundler wrote:
> ISTR some chipsets return 0 or the most recent data on the bus
> when INB/INW master-abort.  Maybe this an ISA bus behavior?

It's not a master-abort; it won't get as far as the device.
Documentation/pci-error-recovery.txt says reads return 0xffffffff.

> 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().

As the comment says, the boards which do this are broken.  It's highly
unlikely those boards will support error isolation and recovery ;-)
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