Revert DSCP update changes.

This reverts commit cd8fca2ba0 (jsonrpc:
Correctly setting the dscp value before reconnect.) and commit
b2e18db292 (No need to restart DB / OVS on
changing dscp value.), which on some systems causes numerous unit test
failures that valgrind diagnoses as:

Conditional jump or move depends on uninitialised value(s)
   at 0x805F63F: jsonrpc_session_set_dscp (jsonrpc.c:1061)
   by 0x804F45D: ovsdb_jsonrpc_server_set_remotes (jsonrpc-server.c:417)
   by 0x804B775: reconfigure_from_db (ovsdb-server.c:656)
   by 0x804C231: main (ovsdb-server.c:159)

Signed-off-by: Ben Pfaff <blp@nicira.com>

lib/jsonrpc.c

@@ -1058,8 +1058,5 @@ void
 jsonrpc_session_set_dscp(struct jsonrpc_session *s,
                          uint8_t dscp)
 {
-    if (s->dscp != dscp) {
+    s->dscp = dscp;
-        s->dscp = dscp;
-        jsonrpc_session_force_reconnect(s);
-    }
 }

lib/rconn.c

@@ -226,12 +226,6 @@ rconn_set_dscp(struct rconn *rc, uint8_t dscp)
     rc->dscp = dscp;
 }
 
-uint8_t
-rconn_get_dscp(const struct rconn *rc)
-{
-    return rc->dscp;
-}
-
 void
 rconn_set_probe_interval(struct rconn *rc, int probe_interval)
 {

lib/rconn.h

@@ -40,7 +40,6 @@ struct rconn_packet_counter;
 struct rconn *rconn_create(int inactivity_probe_interval,
 			   int max_backoff, uint8_t dscp);
 void rconn_set_dscp(struct rconn *rc, uint8_t dscp);
-uint8_t rconn_get_dscp(const struct rconn *rc);
 void rconn_set_max_backoff(struct rconn *, int max_backoff);
 int rconn_get_max_backoff(const struct rconn *);
 void rconn_set_probe_interval(struct rconn *, int inactivity_probe_interval);

ofproto/connmgr.c

@@ -1114,12 +1114,6 @@ ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
     rconn_set_probe_interval(ofconn->rconn, probe_interval);
 
     ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
-
-    /* If dscp value changed reconnect. */
-    if (c->dscp != rconn_get_dscp(ofconn->rconn)) {
-        rconn_set_dscp(ofconn->rconn, c->dscp);
-        rconn_reconnect(ofconn->rconn);
-    }
 }
 
 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow

vswitchd/vswitch.xml

@@ -2756,9 +2756,10 @@
         Service (QoS) on IP networks.
 
         The DSCP value specified here is used when establishing the connection
-        between the controller and the Open vSwitch.  If no value is specified,
+        between the controller and the Open vSwitch.  The connection must be
-        a default value of 48 is chosen.  Valid DSCP values must be in the
+        reset for the new DSCP values to take effect.  If no value is
-        range 0 to 63.
+        specified, a default value of 48 is chosen.  Valid DSCP values must be
+        in the range 0 to 63.
       </column>
     </group>
 
@@ -3002,9 +3003,10 @@
         Service (QoS) on IP networks.
 
         The DSCP value specified here is used when establishing the connection
-        between the manager and the Open vSwitch.  If no value is specified, a
+        between the manager and the Open vSwitch.  The connection must be
-        default value of 48 is chosen.  Valid DSCP values must be in the range
+        reset for the new DSCP values to take effect.  If no value is
-        0 to 63.
+        specified, a default value of 48 is chosen.  Valid DSCP values must be
+        in the range 0 to 63.
       </column>
     </group>