iommu/dma: Restore scatterlist offsets correctly

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commit 07b48ac4bb upstream.

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: 164afb1d85 ("iommu/dma: Use correct offset in map_sg")
Reported-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Robin Murphy 2016-03-10 19:28:12 +00:00 • committed by Greg Kroah-Hartman

parent 99067b8e85

commit e05cff2aa3

1 changed files with 2 additions and 2 deletions

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drivers/iommu/dma-iommu.c

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