tree a6799da585a3f46bad52ceaa8333c4714aaf20d8
parent ce273db0ff1ae64fea785af25a43977b0b6a4555
author Robin Murphy <robin.murphy@arm.com> 1484573094 +0000
committer Joerg Roedel <jroedel@suse.de> 1485789264 +0100

iommu/dma: Stop getting dma_32bit_pfn wrong

iommu_dma_init_domain() was originally written under the misconception
that dma_32bit_pfn represented some sort of size limit for IOVA domains.
Since the truth is almost the exact opposite of that, rework the logic
and comments to reflect its real purpose of optimising lookups when
allocating from a subset of the available 64-bit space.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>