[PATCH 1/2] iommu/dma: Restore scatterlist offsets correctly

Joerg Roedel joro at 8bytes.org
Tue Apr 5 06:33:10 PDT 2016

On Tue, Apr 05, 2016 at 02:11:38PM +0100, Robin Murphy wrote:
> On 05/04/16 13:59, Joerg Roedel wrote:
> >On Thu, Mar 10, 2016 at 07:28:12PM +0000, Robin Murphy wrote:
> >>With the change to stashing just the IOVA-page-aligned remainder of the
> >>CPU-page offset rather than the whole thing, the failure path in
> >>__invalidate_sg() also needs tweaking to account for that in the case of
> >>differing page sizes where the two offsets may not be equivalent.
> >>Similarly in __finalise_sg(), lest the architecture-specific wrappers
> >>later get the wrong address for cache maintenance on sync or unmap.
> >>
> >>Fixes: 164afb1d85b8 ("iommu/dma: Use correct offset in map_sg")
> >>Reported-by: Magnus Damm <damm+renesas at opensource.se>
> >>Signed-off-by: Robin Murphy <robin.murphy at arm.com>
> >
> >Cc: stable at ver.kernel.org # v4.4+ ?
> Good point - the kind of people using 64k pages are also likely to
> be the ones sticking to stable kernels. Are you able to handle that,
> or would you like me to resend?

I added the tag and put the commit into my iommu/fixes branch. Can you
re-send me the second commit when the first is upstream (I'll send the
pull-req this week)? I'd like to avoid creating an additional
merge-commit just for this patch.


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