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Diffstat (limited to 'arch/frv/mb93090-mb00/pci-dma-nommu.c')
-rw-r--r--arch/frv/mb93090-mb00/pci-dma-nommu.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/frv/mb93090-mb00/pci-dma-nommu.c b/arch/frv/mb93090-mb00/pci-dma-nommu.c
index 90f2e4cb33d6..187688128c65 100644
--- a/arch/frv/mb93090-mb00/pci-dma-nommu.c
+++ b/arch/frv/mb93090-mb00/pci-dma-nommu.c
@@ -109,16 +109,19 @@ static int frv_dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction direction,
unsigned long attrs)
{
- int i;
struct scatterlist *sg;
+ int i;
+
+ BUG_ON(direction == DMA_NONE);
+
+ if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
+ return nents;
for_each_sg(sglist, sg, nents, i) {
frv_cache_wback_inv(sg_dma_address(sg),
sg_dma_address(sg) + sg_dma_len(sg));
}
- BUG_ON(direction == DMA_NONE);
-
return nents;
}
@@ -127,7 +130,10 @@ static dma_addr_t frv_dma_map_page(struct device *dev, struct page *page,
enum dma_data_direction direction, unsigned long attrs)
{
BUG_ON(direction == DMA_NONE);
- flush_dcache_page(page);
+
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ flush_dcache_page(page);
+
return (dma_addr_t) page_to_phys(page) + offset;
}