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powerpc: Fix dma_map_sg() cache flushing on non coherent platforms 

On PowerPC 4xx or other non cache-coherent platforms, we lost the
appropriate cache flushing in dma_map_sg() when merging the 32 and
64-bit DMA code (commit 4fc665b88a,
"powerpc: Merge 32 and 64-bit dma code").  This restores it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
Benjamin Herrenschmidt 2008-11-30 18:53:40 +00:00 committed by Paul Mackerras
parent f6f7b52e2f
commit 2434bbb30e
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kernel/dma.c
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@ -75,6 +75,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = sg_phys(sg) + get_dma_direct_offset(dev);
sg->dma_length = sg->length;
__dma_sync_page(sg_page(sg), sg->offset, sg->length, direction);
}
return nents;