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author | Fugang Duan <fugang.duan@nxp.com> | 2019-07-19 17:26:48 +0800 |
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committer | Christoph Hellwig <hch@lst.de> | 2019-07-19 14:09:40 +0200 |
commit | 449fa54d6815be8c2c1f68fa9dbbae9384a7c03e (patch) | |
tree | b1d2c2c29c8725f8e634a284e2e23c391ed0e059 /include | |
parent | a5008b59cd9d8de12ab623cb5052bb4735330e5c (diff) | |
download | linux-449fa54d6815be8c2c1f68fa9dbbae9384a7c03e.tar.bz2 |
dma-direct: correct the physical addr in dma_direct_sync_sg_for_cpu/device
dma_map_sg() may use swiotlb buffer when the kernel command line includes
"swiotlb=force" or the dma_addr is out of dev->dma_mask range. After
DMA complete the memory moving from device to memory, then user call
dma_sync_sg_for_cpu() to sync with DMA buffer, and copy the original
virtual buffer to other space.
So dma_direct_sync_sg_for_cpu() should use swiotlb physical addr, not
the original physical addr from sg_phys(sg).
dma_direct_sync_sg_for_device() also has the same issue, correct it as
well.
Fixes: 55897af63091("dma-direct: merge swiotlb_dma_ops into the dma_direct code")
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions