[PATCH] libibnetdisc: no backward NodeInfo queries

[Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>]

Then switch is reached via port N we don't need to query back via this
port - source node is discovered already. Finally this saves some amount
of unnecessary MADs.

Signed-off-by: Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>
---
 infiniband-diags/libibnetdisc/src/ibnetdisc.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/infiniband-diags/libibnetdisc/src/ibnetdisc.c b/infiniband-diags/libibnetdisc/src/ibnetdisc.c
index 65126dd..03b678e 100644
--- a/infiniband-diags/libibnetdisc/src/ibnetdisc.c
+++ b/infiniband-diags/libibnetdisc/src/ibnetdisc.c
@@ -199,7 +199,8 @@ static int recv_port_info(smp_engine_t * engine, ibnd_smp_t * smp,
 
 	if (port_num && mad_get_field(port->info, 0, IB_PORT_PHYS_STATE_F)
 	    == IB_PORT_PHYS_STATE_LINKUP
-	    && (node->type == IB_NODE_SWITCH || node == fabric->from_node)) {
+	    && ((node->type == IB_NODE_SWITCH && port_num != local_port) ||
+		 node == fabric->from_node)) {
 		ib_portid_t path = smp->path;
 		if (extend_dpath(engine, &path, port_num) > 0)
 			query_node_info(engine, &path, node);
-- 
1.7.0.4

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