cxgb4: Add flag tc_flower_initialized

Add flag tc_flower_initialized to indicate the
completion if tc flower initialization.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -957,6 +957,7 @@ struct adapter {
 	struct chcr_stats_debug chcr_stats;
 
 	/* TC flower offload */
+	bool tc_flower_initialized;
 	struct rhashtable flower_tbl;
 	struct rhashtable_params flower_ht_params;
 	struct timer_list flower_stats_timer;

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c

@@ -874,6 +874,9 @@ int cxgb4_init_tc_flower(struct adapter *adap)
 {
 	int ret;
 
+	if (adap->tc_flower_initialized)
+		return -EEXIST;
+
 	adap->flower_ht_params = cxgb4_tc_flower_ht_params;
 	ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params);
 	if (ret)
@@ -882,13 +885,18 @@ int cxgb4_init_tc_flower(struct adapter *adap)
 	INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler);
 	timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0);
 	mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
+	adap->tc_flower_initialized = true;
 	return 0;
 }
 
 void cxgb4_cleanup_tc_flower(struct adapter *adap)
 {
+	if (!adap->tc_flower_initialized)
+		return;
+
 	if (adap->flower_stats_timer.function)
 		del_timer_sync(&adap->flower_stats_timer);
 	cancel_work_sync(&adap->flower_stats_work);
 	rhashtable_destroy(&adap->flower_tbl);
+	adap->tc_flower_initialized = false;
 }

drivers/net/ethernet/chelsio/cxgb4/sched.c

@@ -539,6 +539,9 @@ void t4_cleanup_sched(struct adapter *adap)
 		struct port_info *pi = netdev2pinfo(adap->port[j]);
 
 		s = pi->sched_tbl;
+		if (!s)
+			continue;
+
 		for (i = 0; i < s->sched_size; i++) {
 			struct sched_class *e;