opensm: switch incorrectly reports IB_PORT_CAP_HAS_MCAST_FDB_TOP ?

["Jim Schutt" <jaschut-4OHPYypu0djtX7QSmKvirg@public.gmane.org>]

Hi,

I've been testing the current opensm development head
(commit 83b67527d16 from git://git.openfabrics.org/~alexnetes/opensm),
and I've been getting some messages that are new since version 3.3.7:

Apr 22 12:08:09 646534 [411CD940] 0x01 -> log_rcv_cb_error: ERR 3111: Received MAD with error status = 0x1C
                         SubnGetResp(SwitchInfo), attr_mod 0x0, TID 0x4802
                         Initial path: 0,1,1,4 Return path: 0,20,1,7

I get one of these messages for each switch in my fabric, on every
heavy sweep.

It appears these are caused by my switches incorrectly reporting
the capability IB_PORT_CAP_HAS_MCAST_FDB_TOP; i.e. this patch stops
the messages:

diff --git a/opensm/osm_mcast_mgr.c b/opensm/osm_mcast_mgr.c
index ea52bfe..63d2968 100644
--- a/opensm/osm_mcast_mgr.c
+++ b/opensm/osm_mcast_mgr.c
@@ -1041,7 +1041,7 @@ static void mcast_mgr_set_mfttop(IN osm_sm_t * sm, IN osm_switch_t * p_sw)
  	p_path = osm_physp_get_dr_path_ptr(p_physp);
  	p_tbl = osm_switch_get_mcast_tbl_ptr(p_sw);

-	if (p_physp->port_info.capability_mask & IB_PORT_CAP_HAS_MCAST_FDB_TOP) {
+	if (0 && p_physp->port_info.capability_mask & IB_PORT_CAP_HAS_MCAST_FDB_TOP) {
  		/*
  		   Set the top of the multicast forwarding table.
  		 */

IB_PORT_CAP_HAS_MCAST_FDB_TOP is bit 30 of the port capability mask,
which in at least IBA v1.2.1 was a reserved bit but apparently is
not anymore.

Should I file a bug report with my switch vendor about setting
a port capability bit for a capability they don't support, or
is there something else going on that I haven't figured out yet?

FWIW I think my switches have a base SP0; maybe it's got something
to do with that?

Thanks -- Jim

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html