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[mm PATCH v3 03/23] arch/avr32: 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.

Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
---
 arch/avr32/mm/dma-coherent.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/avr32/mm/dma-coherent.c b/arch/avr32/mm/dma-coherent.c
index 58610d0..54534e5 100644
--- a/arch/avr32/mm/dma-coherent.c
+++ b/arch/avr32/mm/dma-coherent.c
@@ -146,7 +146,8 @@ static dma_addr_t avr32_dma_map_page(struct device *dev, struct page *page,
 {
 	void *cpu_addr = page_address(page) + offset;
 
-	dma_cache_sync(dev, cpu_addr, size, direction);
+	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+		dma_cache_sync(dev, cpu_addr, size, direction);
 	return virt_to_bus(cpu_addr);
 }
 
@@ -162,6 +163,10 @@ static int avr32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
 
 		sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset;
 		virt = sg_virt(sg);
+
+		if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
+			continue;
+
 		dma_cache_sync(dev, virt, sg->length, direction);
 	}
 

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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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