Commit f860122c authored May 19, 2018 by Christoph Hellwig

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>

parent 4ac1c68e

arch/nds32/kernel/dma.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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 = {