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authorJoerg Roedel <joro@8bytes.org>2013-04-09 15:04:36 +0200
committerJoerg Roedel <joro@8bytes.org>2013-04-18 17:19:45 +0200
commita0e191b23d93464bf8726eba8da081d23c08e185 (patch)
treea3c7c2aaadf888c15c0e39dc35b37ba548f6f7fa /drivers/iommu
parent925fe08bce38d1ff052fe2209b9e2b8d5fbb7f98 (diff)
downloadop-kernel-dev-a0e191b23d93464bf8726eba8da081d23c08e185.zip
op-kernel-dev-a0e191b23d93464bf8726eba8da081d23c08e185.tar.gz
iommu/amd: Remove map_sg_no_iommu()
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. Reviewed-by: Shuah Khan <shuahkhan@gmail.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu.c22
1 files changed, 1 insertions, 21 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index d6433e2..93b1874 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2842,24 +2842,6 @@ 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).
*/
@@ -2878,9 +2860,7 @@ 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;
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