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-rw-r--r--lib/swiotlb.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 2bde54a40d8..d912f068145 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -731,10 +731,16 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = swiotlb_bus_to_virt(dev_addr);
BUG_ON(dir == DMA_NONE);
- if (is_swiotlb_buffer(dma_addr))
+
+ if (is_swiotlb_buffer(dma_addr)) {
sync_single(hwdev, dma_addr, size, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(dma_addr, size);
+ return;
+ }
+
+ if (dir != DMA_FROM_DEVICE)
+ return;
+
+ dma_mark_clean(dma_addr, size);
}
void
@@ -761,13 +767,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size,
int dir, int target)
{
- char *dma_addr = swiotlb_bus_to_virt(dev_addr) + offset;
-
- BUG_ON(dir == DMA_NONE);
- if (is_swiotlb_buffer(dma_addr))
- sync_single(hwdev, dma_addr, size, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(dma_addr, size);
+ swiotlb_sync_single(hwdev, dev_addr + offset, size, dir, target);
}
void
@@ -890,15 +890,9 @@ swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
struct scatterlist *sg;
int i;
- BUG_ON(dir == DMA_NONE);
-
- for_each_sg(sgl, sg, nelems, i) {
- if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg)))
- sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
+ for_each_sg(sgl, sg, nelems, i)
+ swiotlb_sync_single(hwdev, sg->dma_address,
sg->dma_length, dir, target);
- else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
- }
}
void