[IA64] Fix XEN_DOMCTL_shadow_op. it should check copy_to_guest() return value.

Pointed out by Samuel Thibault.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

diff --git a/xen/arch/ia64/xen/dom0_ops.c b/xen/arch/ia64/xen/dom0_ops.c
index a37eef1e8387994b7de33ccaa1c318db3793399b..438796c0cfe6978d1da9900de2cfdd14a4b5351f 100644 (file)
--- a/xen/arch/ia64/xen/dom0_ops.c
+++ b/xen/arch/ia64/xen/dom0_ops.c
@@ -168,7 +168,8 @@ long arch_do_domctl(xen_domctl_t *op, XEN_GUEST_HANDLE(xen_domctl_t) u_domctl)
         {
             ret = shadow_mode_control(d, &op->u.shadow_op);
             put_domain(d);
-            copy_to_guest(u_domctl, op, 1);
+            if (copy_to_guest(u_domctl, op, 1))
+                ret = -EFAULT;
         } 
     }
     break;