commit 602d9858f07c72eab64f5f00e2fae55f9902cfbe
author Nikita Yushchenko <nikita.yoush@cogentembedded.com> Wed Jan 11 21:56:31 2017 +0300
committer Konrad Rzeszutek Wilk <konrad@kernel.org> Sun Jan 15 12:37:24 2017 -0500
tree 274545ab1eed32ac6528047ad363c169753b1f7e
parent 7453c549f5f6485c0d79cad7844870dcc7d1b34d

swiotlb: ensure that page-sized mappings are page-aligned

Some drivers do depend on page mappings to be page aligned.

Swiotlb already enforces such alignment for mappings greater than page,
extend that to page-sized mappings as well.

Without this fix, nvme hits BUG() in nvme_setup_prps(), because that routine
assumes page-aligned mappings.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>