diff options
| -rw-r--r-- | include/asm-avr32/dma-mapping.h | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/include/asm-avr32/dma-mapping.h b/include/asm-avr32/dma-mapping.h index 21bb60bbb9a..81e342636ac 100644 --- a/include/asm-avr32/dma-mapping.h +++ b/include/asm-avr32/dma-mapping.h @@ -264,7 +264,11 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { - dma_cache_sync(dev, bus_to_virt(dma_handle), size, direction); + /* + * No need to do anything since the CPU isn't supposed to + * touch this memory after we flushed it at mapping- or + * sync-for-device time. + */ } static inline void @@ -309,12 +313,11 @@ static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) { - int i; - - for (i = 0; i < nents; i++) { - dma_cache_sync(dev, page_address(sg[i].page) + sg[i].offset, - sg[i].length, direction); - } + /* + * No need to do anything since the CPU isn't supposed to + * touch this memory after we flushed it at mapping- or + * sync-for-device time. + */ } static inline void |