From 71bfae9097a94bb9a07afc6c16077429d3e40709 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 15 Nov 2013 14:22:15 +0000 Subject: 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 Acked-by: Konrad Rzeszutek Wilk --- drivers/xen/swiotlb-xen.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/xen') 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 -- cgit v1.2.3 From 14883a75ec76b44759385fb12629f4a0f1aef4e3 Mon Sep 17 00:00:00 2001 From: Matt Wilson Date: Wed, 20 Nov 2013 12:11:35 -0800 Subject: xen/gnttab: leave lazy MMU mode in the case of a m2p override failure Commit f62805f1 introduced a bug where lazy MMU mode isn't exited if a m2p_add/remove_override call fails. Acked-by: Stefano Stabellini Cc: Boris Ostrovsky Reviewed-by: David Vrabel Reviewed-by: Anthony Liguori Cc: xen-devel@lists.xenproject.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Matt Wilson Signed-off-by: Konrad Rzeszutek Wilk CC: stable@vger.kernel.org --- drivers/xen/grant-table.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/xen') 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(); -- cgit v1.2.3