This function was intended as a fall-back if the map_sg
function is called for a device not mapped by the IOMMU.
Since the AMD IOMMU driver uses per-device dma_ops this can
never happen. So this function isn't needed anymore.
Signed-off-by: Joerg Roedel <j...@8bytes.org>
---
drivers/iommu/amd_iommu.c | 22 +---------------------
1 file changed, 1 insertion(+), 21 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b287ca3..3b2aff0 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2839,24 +2839,6 @@ static void unmap_page(struct device *dev, dma_addr_t
dma_addr, size_t size,
}
/*
- * This is a special map_sg function which is used if we should map a
- * device which is not handled by an AMD IOMMU in the system.
- */
-static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist,
- int nelems, int dir)
-{
- struct scatterlist *s;
- int i;
-
- for_each_sg(sglist, s, nelems, i) {
- s->dma_address = (dma_addr_t)sg_phys(s);
- s->dma_length = s->length;
- }
-
- return nelems;
-}
-
-/*
* The exported map_sg function for dma_ops (handles scatter-gather
* lists).
*/
@@ -2875,9 +2857,7 @@ static int map_sg(struct device *dev, struct scatterlist
*sglist,
INC_STATS_COUNTER(cnt_map_sg);
domain = get_domain(dev);
- if (PTR_ERR(domain) == -EINVAL)
- return map_sg_no_iommu(dev, sglist, nelems, dir);
- else if (IS_ERR(domain))
+ if (IS_ERR(domain))
return 0;
dma_mask = *dev->dma_mask;
--
1.7.9.5
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