[PATCH v3 1/6] iommu/core: split mapping to page sizes as supported by the hardware

[Ohad Ben-Cohen]

On Tue, Oct 11, 2011 at 12:38 PM, Roedel, Joerg <Joerg.Roedel at amd.com> wrote:
> You need to make sure that you don;t pass larger regions then requested
> to the low-level driver. Some logic like in the iommu_map function
> should do it.

You're right. But the solution IMHO should be getting rid of that size
-> order -> size conversion which we do back and forth, as it's kinda
pointless.

> Please use PAGE_SIZE instead of 0x1000UL.

This one would go away too if we remove the size -> order -> size
conversions. In fact, iommu_unmap() just becomes so much simpler when
we do that.

I'm attaching two patches: first one that removes the
size->order->size conversions we have, and then the usual pgsize patch
rebased to it.

Please take a look,

Thanks,
Ohad.