Re: [PATCH V2 5/5] DO NOT MERGE: iommu: disable list appending in dma-iommu

[Christoph Hellwig]

On Mon, Sep 07, 2020 at 09:18:50PM +0100, Tom Murphy wrote:
> Yeah we talked about passing an attr to map_sg to disable merging at
> the following microconfernce:
> https://linuxplumbersconf.org/event/7/contributions/846/
> As far as I can remember everyone seemed happy with that solution. I
> won't be working on this though as I don't have any more time to
> dedicate to this. It seems Lu Baolu will take over this.

I'm absolutely again passing a flag.  Tha just invites further
abuse.  We need a PCI ID based quirk or something else that can't
be as easily abused.