net/sched: cls_flower: Try to offload only if skip_hw flag isn't set

Check skip_hw flag isn't set before calling
fl_hw_{replace/destroy}_filter and fl_hw_update_stats functions.

Replace the call to tc_should_offload with tc_can_offload.
tc_can_offload only checks if the device supports offloading, the check for
skip_hw flag is done earlier in the flow.
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_flower.c

@@ -207,7 +207,7 @@ static void fl_hw_destroy_filter(struct tcf_proto *tp, unsigned long cookie)
 	struct tc_cls_flower_offload offload = {0};
 	struct tc_to_netdev tc;
 
-	if (!tc_should_offload(dev, tp, 0))
+	if (!tc_can_offload(dev, tp))
 		return;
 
 	offload.command = TC_CLSFLOWER_DESTROY;
@@ -231,7 +231,7 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
 	struct tc_to_netdev tc;
 	int err;
 
-	if (!tc_should_offload(dev, tp, flags))
+	if (!tc_can_offload(dev, tp))
 		return tc_skip_sw(flags) ? -EINVAL : 0;
 
 	offload.command = TC_CLSFLOWER_REPLACE;
@@ -259,7 +259,7 @@ static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 	struct tc_cls_flower_offload offload = {0};
 	struct tc_to_netdev tc;
 
-	if (!tc_should_offload(dev, tp, 0))
+	if (!tc_can_offload(dev, tp))
 		return;
 
 	offload.command = TC_CLSFLOWER_STATS;
@@ -275,6 +275,7 @@ static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 {
 	list_del_rcu(&f->list);
+	if (!tc_skip_hw(f->flags))
 		fl_hw_destroy_filter(tp, (unsigned long)f);
 	tcf_unbind_filter(tp, &f->res);
 	call_rcu(&f->rcu, fl_destroy_filter);
@@ -743,6 +744,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 			goto errout;
 	}
 
+	if (!tc_skip_hw(fnew->flags)) {
 		err = fl_hw_replace_filter(tp,
 					   &head->dissector,
 					   &mask.key,
@@ -752,10 +754,12 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 					   fnew->flags);
 		if (err)
 			goto errout;
+	}
 
 	if (fold) {
 		rhashtable_remove_fast(&head->ht, &fold->ht_node,
 				       head->ht_params);
+		if (!tc_skip_hw(fold->flags))
 			fl_hw_destroy_filter(tp, (unsigned long)fold);
 	}
 
@@ -879,6 +883,7 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
 			goto nla_put_failure;
 	}
 
+	if (!tc_skip_hw(f->flags))
 		fl_hw_update_stats(tp, f);
 
 	if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,