The patch titled
Subject: arch/avr32: add option to skip sync on DMA map
has been added to the -mm tree. Its filename is
arch-avr32-add-option-to-skip-sync-on-dma-map.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arch-avr32-add-option-to-skip-sync-on-dma-map.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arch-avr32-add-option-to-skip-sync-on-dma-map.patch
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------------------------------------------------------
From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Subject: arch/avr32: 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/20161110113430.76501.79737.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/avr32/mm/dma-coherent.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN arch/avr32/mm/dma-coherent.c~arch-avr32-add-option-to-skip-sync-on-dma-map arch/avr32/mm/dma-coherent.c
--- a/arch/avr32/mm/dma-coherent.c~arch-avr32-add-option-to-skip-sync-on-dma-map
+++ a/arch/avr32/mm/dma-coherent.c
@@ -146,7 +146,8 @@ static dma_addr_t avr32_dma_map_page(str
{
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 devic
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);
}
_
Patches currently in -mm which might be from alexander.h.duyck@xxxxxxxxx are
arch-arc-add-option-to-skip-sync-on-dma-mapping.patch
arch-arm-add-option-to-skip-sync-on-dma-map-and-unmap.patch
arch-avr32-add-option-to-skip-sync-on-dma-map.patch
arch-blackfin-add-option-to-skip-sync-on-dma-map.patch
arch-c6x-add-option-to-skip-sync-on-dma-map-and-unmap.patch
arch-frv-add-option-to-skip-sync-on-dma-map.patch
arch-hexagon-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
arch-m68k-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
arch-metag-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-microblaze-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-mips-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-nios2-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-openrisc-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
arch-parisc-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-powerpc-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
arch-sh-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
arch-sparc-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-tile-add-option-to-skip-dma-sync-as-a-part-of-map-and-unmap.patch
arch-xtensa-add-option-to-skip-dma-sync-as-a-part-of-mapping.patch
dma-add-calls-for-dma_map_page_attrs-and-dma_unmap_page_attrs.patch
mm-add-support-for-releasing-multiple-instances-of-a-page.patch
igb-update-driver-to-make-use-of-dma_attr_skip_cpu_sync.patch
igb-update-code-to-better-handle-incrementing-page-count.patch
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