diff options
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 2e635b814c1..2362c498f52 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -281,10 +281,14 @@ map_single(struct device *dev, void *ptr, size_t size, ptr = buf->safe; dma_addr = buf->safe_dma_addr; + } else { + /* + * We don't need to sync the DMA buffer since + * it was allocated via the coherent allocators. + */ + consistent_sync(ptr, size, dir); } - consistent_sync(ptr, size, dir); - return dma_addr; } @@ -317,12 +321,12 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, DO_STATS ( device_info->bounce_count++ ); if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) { - unsigned long ptr; + void *ptr = buf->ptr; dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n", - __func__, buf->safe, buf->ptr, size); - memcpy(buf->ptr, buf->safe, size); + __func__, buf->safe, ptr, size); + memcpy(ptr, buf->safe, size); /* * DMA buffers must have the same cache properties @@ -332,8 +336,8 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, * bidirectional case because we know the cache * lines will be coherent with the data written. */ - ptr = (unsigned long)buf->ptr; dmac_clean_range(ptr, ptr + size); + outer_clean_range(__pa(ptr), __pa(ptr) + size); } free_safe_buffer(device_info, buf); } @@ -397,7 +401,10 @@ sync_single(struct device *dev, dma_addr_t dma_addr, size_t size, default: BUG(); } - consistent_sync(buf->safe, size, dir); + /* + * No need to sync the safe buffer - it was allocated + * via the coherent allocators. + */ } else { consistent_sync(dma_to_virt(dev, dma_addr), size, dir); } |