staging: lustre: set downis to 1 if there's no NI for remote net

lnet_route_t::lr_downis is marked as zero even if there is no NI to
target network, this is wrong and breaks logic of ARF. This patch
fixes this problem.

Signed-off-by: Liang Zhen <liang.zhen@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6060
Reviewed-on: http://review.whamcloud.com/13417
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 5e8b0ba763e966baefb1e6a967c8a3a77c94b22a..2eae8f60a8783eb522fdce707c3b7e2b30224e9e 100644 (file)
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -718,6 +718,13 @@ lnet_parse_rc_info(lnet_rc_data_t *rcd)
                        rte->lr_downis = 0;
                        continue;
                }
+               /**
+                * if @down is zero and this route is single-hop, it means
+                * we can't find NI for target network
+                */
+               if (!down && rte->lr_hops == 1)
+                       down = 1;
+
                rte->lr_downis = down;
        }
 }