Merge tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma...

[platform/kernel/linux-starfive.git] / drivers / iommu / iommu.c

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index f53f8b2..780fb70 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2460,6 +2460,9 @@ static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
                        len = 0;
                }
 
+               if (sg_is_dma_bus_address(sg))
+                       goto next;
+
                if (len) {
                        len += sg->length;
                } else {
@@ -2467,6 +2470,7 @@ static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
                        start = s_phys;
                }
 
+next:
                if (++i < nents)
                        sg = sg_next(sg);
        }