diff options
| -rw-r--r-- | arch/arm/common/dmabounce.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 301281645d08..75055df1cda3 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -243,7 +243,8 @@ static int needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size) } static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction dir) + enum dma_data_direction dir, + unsigned long attrs) { struct dmabounce_device_info *device_info = dev->archdata.dmabounce; struct safe_buffer *buf; @@ -262,7 +263,8 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, __func__, buf->ptr, virt_to_dma(dev, buf->ptr), buf->safe, buf->safe_dma_addr); - if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) { + if ((dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) && + !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) { dev_dbg(dev, "%s: copy unsafe %p to safe %p, size %d\n", __func__, ptr, buf->safe, size); memcpy(buf->safe, ptr, size); @@ -272,7 +274,8 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, } static inline void unmap_single(struct device *dev, struct safe_buffer *buf, - size_t size, enum dma_data_direction dir) + size_t size, enum dma_data_direction dir, + unsigned long attrs) { BUG_ON(buf->size != size); BUG_ON(buf->direction != dir); @@ -283,7 +286,8 @@ static inline void unmap_single(struct device *dev, struct safe_buffer *buf, DO_STATS(dev->archdata.dmabounce->bounce_count++); - if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) { + if ((dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) && + !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) { void *ptr = buf->ptr; dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n", @@ -334,7 +338,7 @@ static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page, return DMA_ERROR_CODE; } - return map_single(dev, page_address(page) + offset, size, dir); + return map_single(dev, page_address(page) + offset, size, dir, attrs); } /* @@ -357,7 +361,7 @@ static void dmabounce_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t return; } - unmap_single(dev, buf, size, dir); + unmap_single(dev, buf, size, dir, attrs); } static int __dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr, |