Re: [PATCH?] Crash in 2.4.17/ptrace

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 28 Jan 2002 21:55:47 +0000 (GMT)

> 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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