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-rw-r--r--arch/hexagon/kernel/dma.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c
index b9017785fb71..dbc4f1003da4 100644
--- a/arch/hexagon/kernel/dma.c
+++ b/arch/hexagon/kernel/dma.c
@@ -119,6 +119,9 @@ static int hexagon_map_sg(struct device *hwdev, struct scatterlist *sg,
s->dma_length = s->length;
+ if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
+ continue;
+
flush_dcache_range(dma_addr_to_virt(s->dma_address),
dma_addr_to_virt(s->dma_address + s->length));
}
@@ -180,7 +183,8 @@ static dma_addr_t hexagon_map_page(struct device *dev, struct page *page,
if (!check_addr("map_single", dev, bus, size))
return bad_dma_address;
- dma_sync(dma_addr_to_virt(bus), size, dir);
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ dma_sync(dma_addr_to_virt(bus), size, dir);
return bus;
}