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| author | Carlo Caione <carlo@caione.org> | 2015-02-04 10:23:19 +0100 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2015-02-07 16:38:41 +0900 |
| commit | a5d7ac30fa9ffa923e3603309692a36e3b3b3ae1 (patch) | |
| tree | 6306790667cadc1cc34c5a5a5b39e7385863259a /block/blk-lib.c | |
| parent | 129046c6ecb662e902a241bbbcb1da4206986370 (diff) | |
| download | linux-a5d7ac30fa9ffa923e3603309692a36e3b3b3ae1.tar.bz2 | |
drm/exynos: fix DMA_ATTR_NO_KERNEL_MAPPING usage
The Exynos DRM driver doesn't follow the correct API when dealing with
dma_{alloc, mmap, free}_attrs functions and the
DMA_ATTR_NO_KERNEL_MAPPING attribute.
When a IOMMU is not available and the DMA_ATTR_NO_KERNEL_MAPPING is
used, the driver should use the pointer returned by dma_alloc_attr() as
a cookie.
The Exynos DRM driver directly uses the non-requested virtual kernel
address returned by the DMA mapping subsystem. This just works now
because the non-IOMMU codepath doesn't obey DMA_ATTR_NO_KERNEL_MAPPING
but we need to fix it before fixing the DMA layer.
Signed-off-by: Carlo Caione <carlo@caione.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'block/blk-lib.c')
0 files changed, 0 insertions, 0 deletions