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 at lst.de>
---
arch/nds32/kernel/dma.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c
index 4e6fb4ffd3f7..43d7fd432bb6 100644
--- a/arch/nds32/kernel/dma.c
+++ b/arch/nds32/kernel/dma.c
@@ -426,6 +426,12 @@ 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 = {
--
2.17.0
