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[mm PATCH v3 04/23] arch/blackfin: Add option to skip sync on DMA map

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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.

Cc: Steven Miao <realmz6@gmail.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
---
 arch/blackfin/kernel/dma-mapping.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index 53fbbb6..a27a74a 100644
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -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);
 
-	_dma_sync(handle, size, dir);
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+		_dma_sync(handle, size, dir);
+
 	return handle;
 }
 

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[mm PATCH v3 00/23] Add support for DMA writable pages being  writable by the network stack Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 19/23] arch/xtensa: Add option to skip DMA sync as a  part of mapping Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 08/23] arch/m68k: Add option to skip DMA sync as a  part of mapping Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 17/23] arch/sparc: Add option to skip DMA sync as a  part of map and unmap Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 23/23] igb: Update code to better handle incrementing  page count Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 03/23] arch/avr32: Add option to skip sync on DMA map Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 15/23] arch/powerpc: Add option to skip DMA sync as a  part of mapping Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 12/23] arch/nios2: Add option to skip DMA sync as a  part of map and unmap Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
    Re: [mm PATCH v3 12/23] arch/nios2: Add option to skip DMA sync as a  part of map and unmap Tobias Klauser <tklauser@distanz.ch> - 2016-11-11 12:00 +0100
  [mm PATCH v3 10/23] arch/microblaze: Add option to skip DMA sync as  a part of map and unmap Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:40 +0100
  [mm PATCH v3 04/23] arch/blackfin: Add option to skip sync on DMA  map Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:50 +0100
  [mm PATCH v3 16/23] arch/sh: Add option to skip DMA sync as a part  of mapping Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:50 +0100
  [mm PATCH v3 05/23] arch/c6x: Add option to skip sync on DMA map  and unmap Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:50 +0100
  [mm PATCH v3 13/23] arch/openrisc: Add option to skip DMA sync as a  part of mapping Alexander Duyck <alexander.h.duyck@intel.com> - 2016-11-10 18:50 +0100

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