Date: 10 Jan 2005 17:29:50 +0100
Date: Mon, 10 Jan 2005 17:29:50 +0100
From: Andi Kleen <ak@muc.de>
To: Brian King <brking@us.ibm.com>
Cc: paulus@samba.org, benh@kernel.crashing.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] pci: Block config access during BIST (resend)
Message-ID: <20050110162950.GB14039@muc.de>
References: <200501101449.j0AEnWYF020850@d03av01.boulder.ibm.com> <m14qhpxo2j.fsf@muc.de> <41E2AC74.9090904@us.ibm.com>
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> The problem I am trying to solve is the userspace PCI access methods 
> accessing my config space when the adapter is not able to handle such an 
> access. Today these accesses bypass the device driver altogether and 
> there is no way to stop them. An alternative to this patch would be to 

For this I would add a semaphore or a lock bit to pci_dev.
Probably a simple flag is good enough that is checked by sysfs/proc
and return EBUSY when set. 

This assumes that the driver controls the device during BIST time.

-Andi
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