swiotlb-xen: add missing xen_dma_map_page call

swiotlb-xen is missing a xen_dma_map_page call in
xen_swiotlb_map_sg_attrs, in the bounce buffer path.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index a224bc7..1eac073 100644 (file)
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -555,6 +555,11 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
                                sg_dma_len(sgl) = 0;
                                return 0;
                        }
+                       xen_dma_map_page(hwdev, pfn_to_page(map >> PAGE_SHIFT),
+                                               map & ~PAGE_MASK,
+                                               sg->length,
+                                               dir,
+                                               attrs);
                        sg->dma_address = xen_phys_to_bus(map);
                } else {
                        /* we are not interested in the dma_addr returned by