diff options
author | Robin Murphy <robin.murphy@arm.com> | 2017-01-25 18:31:31 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-12 05:41:47 (GMT) |
commit | a8123045c94638114a0b1ab19fd218dd3a5cd0b5 (patch) | |
tree | 5eeaddaa28f27a046aa9f587719f63d489dce091 /Documentation/assoc_array.txt | |
parent | ac4c8fcf5ebceb0a2b6342707e4835a13f5bcf22 (diff) | |
download | linux-a8123045c94638114a0b1ab19fd218dd3a5cd0b5.tar.xz |
arm64: dma-mapping: Fix dma_mapping_error() when bypassing SWIOTLB
commit adbe7e26f4257f72817495b9bce114284060b0d7 upstream.
When bypassing SWIOTLB on small-memory systems, we need to avoid calling
into swiotlb_dma_mapping_error() in exactly the same way as we avoid
swiotlb_dma_supported(), because the former also relies on SWIOTLB state
being initialised.
Under the assumptions for which we skip SWIOTLB, dma_map_{single,page}()
will only ever return the DMA-offset-adjusted physical address of the
page passed in, thus we can report success unconditionally.
Fixes: b67a8b29df7e ("arm64: mm: only initialize swiotlb when necessary")
CC: Jisheng Zhang <jszhang@marvell.com>
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/assoc_array.txt')
0 files changed, 0 insertions, 0 deletions