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Subject: Re: [PATCH?] Crash in 2.4.17/ptrace
To: akpm@zip.com.au (Andrew Morton)
Date: Mon, 28 Jan 2002 21:55:47 +0000 (GMT)
Cc: dan@debian.org (Daniel Jacobowitz), linux-kernel@vger.kernel.org,
        andrea@suse.de (Andrea Arcangeli)
In-Reply-To: <3C55C2AB.AE73A75D@zip.com.au> from "Andrew Morton" at Jan 28, 2002 01:29:15 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> In the O_DIRECT/map_user_kiobuf case, we could end up asking
> the disk controller to perform busmastering against the video
> PCI device, which will probably explode somewhere down the chain.

Actually we already know if this will fail or not. Check the pci quirks file
We set a bunch of flags for safety issues on pci<->pci transfers. I did that
anticipating one day more than just a few capture cards would care

Alan
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