nfp: change flows in apps that offload ndo_setup_tc

Change the flows a bit in preparation of follow-up changes in
ndo_setup_tc args. Also, change the error code to align with the rest of
the drivers.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/bpf/main.c

@@ -126,19 +126,15 @@ static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
 {
 	struct nfp_net *nn = netdev_priv(netdev);
 
-	if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
-		return -EOPNOTSUPP;
-	if (proto != htons(ETH_P_ALL))
+	if (type != TC_SETUP_CLSBPF || !nfp_net_ebpf_capable(nn) ||
+	    TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS) ||
+	    proto != htons(ETH_P_ALL))
 		return -EOPNOTSUPP;
 
-	if (type == TC_SETUP_CLSBPF && nfp_net_ebpf_capable(nn)) {
-		if (!nn->dp.bpf_offload_xdp)
-			return nfp_net_bpf_offload(nn, tc->cls_bpf);
-		else
+	if (nn->dp.bpf_offload_xdp)
 		return -EBUSY;
-	}
 
-	return -EINVAL;
+	return nfp_net_bpf_offload(nn, tc->cls_bpf);
 }
 
 static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)

drivers/net/ethernet/netronome/nfp/flower/offload.c

@@ -388,14 +388,10 @@ int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
 			enum tc_setup_type type, u32 handle, __be16 proto,
 			struct tc_to_netdev *tc)
 {
-	if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
+	if (type != TC_SETUP_CLSFLOWER ||
+	    TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS) ||
+	    !eth_proto_is_802_3(proto))
 		return -EOPNOTSUPP;
 
-	if (!eth_proto_is_802_3(proto))
-		return -EOPNOTSUPP;
-
-	if (type != TC_SETUP_CLSFLOWER)
-		return -EINVAL;
-
 	return nfp_flower_repr_offload(app, netdev, tc->cls_flower);
 }