[openib-general] [PATCH] ib_mad: In ib_mad_complete_recv, use atomic_dec_and_test and wait_event rather than just atomic_dec for RMPP segments and when solicited and there is no matching request found

Mon Oct 25 11:57:20 PDT 2004

ib_mad: In ib_mad_complete_recv, use atomic_dec_and_test and wait_event
rather than just atomic_dec for RMPP segments and when solicited and
there is no matching request found.


Index: ib_mad.c
===================================================================

--- ib_mad.c    (revision 1062)
+++ ib_mad.c    (working copy)
@@ -875,7 +875,8 @@
        /* Fully reassemble receive before processing */
        recv = reassemble_recv(mad_agent_priv, recv);
        if (!recv) {
-               atomic_dec(&mad_agent_priv->refcount);
+               if (atomic_dec_and_test(&mad_agent_priv->refcount))
+                       wake_up(&mad_agent_priv->wait);
                return;
        }
 
@@ -887,7 +888,8 @@
                if (!mad_send_wr) {
                        spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
                        ib_free_recv_mad(&recv->header.recv_wc);
-                       atomic_dec(&mad_agent_priv->refcount);
+                       if (atomic_dec_and_test(&mad_agent_priv->refcount))
+                               wake_up(&mad_agent_priv->wait);
                        return;
                }
                /* Timeout = 0 means that we won't wait for a response */



