swiotlb: respect min_align_mask
commit: 1f221a0d0dbf0e48ef3a9c62871281d6a7819f05
swiotlb: respect min_align_mask
Respect the min_align_mask in struct device_dma_parameters in swiotlb.
There are two parts to it:
1) for the lower bits of the alignment inside the io tlb slot, just
extent the size of the allocation and leave the start of the slot
empty
2) for the high bits ensure we find a slot that matches the high bits
of the alignment to avoid wasting too much memory
Based on an earlier patch from Jianxiong Gao <jxgao@google.com>.
BUG=b/205968222
TEST=presubmit
RELEASE_NOTE=None
SOURCE=UPSTREAM(f8e71c667ee12094b50f5a935133d080740cd66b)
cos-patch: lts-refresh
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jianxiong Gao <jxgao@google.com>
Tested-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: Id005f45cbc6a316a5433cc6825ef9a6056e527d4
1 file changed
