xen: add missing unlock from gnttab_get_version

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reported-by: Francisco Rocha <f.e.liberal-rocha@newcastle.ac.uk>
Committed-by: Keir Fraser <keir@xen.org>

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 9defa4d74c5dd82bdad60305d5900a3c9e6fa018..4d637833d6973c58f6a2c727653601de5569c14e 100644 (file)
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -2321,6 +2321,8 @@ gnttab_get_version(XEN_GUEST_HANDLE(gnttab_get_version_t uop))
     op.version = d->grant_table->gt_version;
     spin_unlock(&d->grant_table->lock);
 
+    rcu_unlock_domain(d);
+
     if ( copy_to_guest(uop, &op, 1) )
         return -EFAULT;