Merge tag 'stable/for-linus-3.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
 "Fixes to patches that went in this merge window along with a latent
  bug:
   - Fix lazy flushing in case m2p override fails.
   - Fix module compile issues with ARM/Xen
   - Add missing call to DMA map page for Xen SWIOTLB for ARM"

* tag 'stable/for-linus-3.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
  xen/arm: p2m_init and p2m_lock should be static
  arm/xen: Export phys_to_mach to fix Xen module link errors
  swiotlb-xen: add missing xen_dma_map_page call

2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 62ccf5424ba8..028387192b60 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -930,9 +930,10 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
 		ret = m2p_add_override(mfn, pages[i], kmap_ops ?
 				       &kmap_ops[i] : NULL);
 		if (ret)
-			return ret;
+			goto out;
 	}
 
+ out:
 	if (lazy)
 		arch_leave_lazy_mmu_mode();
 
@@ -969,9 +970,10 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
 		ret = m2p_remove_override(pages[i], kmap_ops ?
 				       &kmap_ops[i] : NULL);
 		if (ret)
-			return ret;
+			goto out;
 	}
 
+ out:
 	if (lazy)
 		arch_leave_lazy_mmu_mode();
 
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index a224bc74b6b9..1eac0731c349 100644
--- 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