Commit 8c16a2e2 authored by Alexander Duyck's avatar Alexander Duyck Committed by Linus Torvalds

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.comSigned-off-by: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Cc: Steven Miao <realmz6@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e8b4762c
...@@ -118,6 +118,10 @@ static int bfin_dma_map_sg(struct device *dev, struct scatterlist *sg_list, ...@@ -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) { for_each_sg(sg_list, sg, nents, i) {
sg->dma_address = (dma_addr_t) sg_virt(sg); 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); __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, ...@@ -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); dma_addr_t handle = (dma_addr_t)(page_address(page) + offset);
_dma_sync(handle, size, dir); if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
_dma_sync(handle, size, dir);
return handle; return handle;
} }
......
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