Commit 8c16a2e2 authored Dec 14, 2016 by Alexander Duyck Committed by Linus Torvalds Dec 14, 2016

arch/blackfin: add option to skip sync on DMA map

The use of DMA_ATTR_SKIP_CPU_SYNC was not consistent across all of the
DMA APIs in the arch/arm folder.  This change is meant to correct that
so that we get consistent behavior.

Link: http://lkml.kernel.org/r/20161110113436.76501.13386.stgit@ahduyck-blue-test.jf.intel.com


Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Steven Miao <realmz6@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent e8b4762c

arch/blackfin/kernel/dma-mapping.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -118,6 +118,10 @@ static int bfin_dma_map_sg(struct device dev, struct scatterlist sg_list,

		for_each_sg(sg_list, sg, nents, i) {
		sg->dma_address = (dma_addr_t) sg_virt(sg);

		if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
		continue;

		__dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction);
		}

		@@ -143,7 +147,9 @@ static dma_addr_t bfin_dma_map_page(struct device dev, struct page page,
		{
		dma_addr_t handle = (dma_addr_t)(page_address(page) + offset);

		if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
		_dma_sync(handle, size, dir);

		return handle;
		}