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| author | Christoph Hellwig <hch@lst.de> | 2018-05-19 09:22:05 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-29 16:10:27 +0200 |
| commit | f860122c512215df598fc5b5cfe36e35335f6c6f (patch) | |
| tree | d63071802f68759339eb2afb3d03da8089945e17 /arch/nds32 | |
| parent | 4ac1c68e360653cad34488a5a1915d55f7c3fa86 (diff) | |
| download | linux-stable-f860122c512215df598fc5b5cfe36e35335f6c6f.tar.gz linux-stable-f860122c512215df598fc5b5cfe36e35335f6c6f.tar.bz2 linux-stable-f860122c512215df598fc5b5cfe36e35335f6c6f.zip | |
nds32: implement the unmap_sg DMA operation
This matches the implementation of the more commonly used unmap_single
routines and the sync_sg_for_cpu method which should provide equivalent
cache maintainance.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greentime Hu <greentime@andestech.com>
Tested-by: Greentime Hu <greentime@andestech.com>
Diffstat (limited to 'arch/nds32')
| -rw-r--r-- | arch/nds32/kernel/dma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c index e0c94a2889c5..b9973317c734 100644 --- a/arch/nds32/kernel/dma.c +++ b/arch/nds32/kernel/dma.c @@ -458,6 +458,12 @@ static void nds32_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction dir, unsigned long attrs) { + int i; + + for (i = 0; i < nhwentries; i++, sg++) { + nds32_dma_sync_single_for_cpu(dev, sg_dma_address(sg), + sg->length, dir); + } } struct dma_map_ops nds32_dma_ops = { |