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') 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