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Date: Wed, 28 Nov 2001 14:49:25 -0800 (PST)
Message-Id: <20011128.144925.94842859.davem@redhat.com>
To: groudier@free.fr
Cc: matthias@winterdrache.de, linux-kernel@vger.kernel.org
Subject: Re: sym53c875: reading /proc causes SCSI parity error
From: "David S. Miller" <davem@redhat.com>
In-Reply-To: <20011128203718.L2777-100000@gerard>
In-Reply-To: <20011128.131503.22504634.davem@redhat.com>
	<20011128203718.L2777-100000@gerard>
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   From: G?rard Roudier <groudier@free.fr>
   Date: Wed, 28 Nov 2001 20:51:01 +0100 (CET)
   
   On Wed, 28 Nov 2001, David S. Miller wrote:
   
   > Why not just put some bitmap pointer into the pci device
   > struct.  If it is non-NULL, it specifies PCI config space
   > areas which have side-effects.
   
   Or a simple offset beyond which reading data isn't desirable for
   whatever reasons.

I do not think that is sufficient.

I have seen chips where only one single PCI config space word would
trigger problems, and it was due to a hw bug.  The "offset beyond"
scheme would not allow to cover this case.
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