[openib-general] CM REP-REJ bug

[Libor Michalek]

Sean,

   There's a problem with REJ response to REQ. The REJ handler
uses cm_acquire_id() to find the cm_id of the REQ, but it uses 
rej_msg->local_comm_id to perform the lookup. In the REQ case the
cm_id does not have a remote_id with which to match the REJ.

  Here's a possible patch.

-Libor

Signed-off-by: Libor Michalek <libor at topspin.com>

Index: infiniband/core/cm.c
===================================================================
--- infiniband/core/cm.c	(revision 1922)
+++ infiniband/core/cm.c	(working copy)
@@ -317,7 +317,8 @@
 	spin_lock_irqsave(&cm.lock, flags);
 	cm_id_priv = idr_find(&cm.local_id_table, (int) local_id);
 	if (cm_id_priv) {
-		if (cm_id_priv->id.remote_id == remote_id)
+		if (cm_id_priv->id.remote_id == 0 ||
+		    cm_id_priv->id.remote_id == remote_id)
 			atomic_inc(&cm_id_priv->refcount);
 		else
 			cm_id_priv = NULL;