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SubjectRe: alpha iommu fixes

Andrea Arcangeli writes:
> > Well this is news to me. No drivers understand this.
> Yes, almost all drivers are buggy.

No, the interface says that the DMA routines may not return failure.

If you want to change the DMA api to act some other way, then fine
please propose it, but do not act as if today they have to act this
way because that is simply not true.

David S. Miller
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