net: Remove redundant if statements

The 'if (dev)' statement already move into dev_{put , hold}, so remove
redundant if statements.

Signed-off-by: Yajun Deng <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/batman-adv/bridge_loop_avoidance.c

···
 	if (primary_if)
 		batadv_hardif_put(primary_if);
 
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }
···
 	if (primary_if)
 		batadv_hardif_put(primary_if);
 
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }

net/batman-adv/distributed-arp-table.c

···
 	if (primary_if)
 		batadv_hardif_put(primary_if);
 
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }

net/batman-adv/gateway_client.c

···
 out:
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }

net/batman-adv/multicast.c

···
 		upper = netdev_master_upper_dev_get_rcu(upper);
 	} while (upper && !(upper->priv_flags & IFF_EBRIDGE));
 
-	if (upper)
-		dev_hold(upper);
+	dev_hold(upper);
 	rcu_read_unlock();
 
 	return upper;
···
 	}
 
 out:
-	if (bridge)
-		dev_put(bridge);
+	dev_put(bridge);
 
 	return ret4 + ret6;
 }
···
 	}
 
 out:
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	if (!ret && primary_if)
 		*primary_if = hard_iface;

net/batman-adv/originator.c

···
  out:
 	if (hardif)
 		batadv_hardif_put(hardif);
-	if (hard_iface)
-		dev_put(hard_iface);
+	dev_put(hard_iface);
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }
···
  out:
 	if (hardif)
 		batadv_hardif_put(hardif);
-	if (hard_iface)
-		dev_put(hard_iface);
+	dev_put(hard_iface);
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	return ret;
 }

net/batman-adv/translation-table.c

···
 out:
 	if (in_hardif)
 		batadv_hardif_put(in_hardif);
-	if (in_dev)
-		dev_put(in_dev);
+	dev_put(in_dev);
 	if (tt_local)
 		batadv_tt_local_entry_put(tt_local);
 	if (tt_global)
···
  out:
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	cb->args[0] = bucket;
 	cb->args[1] = idx;
···
  out:
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-	if (soft_iface)
-		dev_put(soft_iface);
+	dev_put(soft_iface);
 
 	cb->args[0] = bucket;
 	cb->args[1] = idx;

net/can/raw.c

···
 		ro->count  = count;
 
  out_fil:
-		if (dev)
-			dev_put(dev);
-
+		dev_put(dev);
 		release_sock(sk);
 		rtnl_unlock();
 
···
 		ro->err_mask = err_mask;
 
  out_err:
-		if (dev)
-			dev_put(dev);
-
+		dev_put(dev);
 		release_sock(sk);
 		rtnl_unlock();
 

net/core/dev.c

···
 
 	rcu_read_lock();
 	dev = dev_get_by_name_rcu(net, name);
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 	rcu_read_unlock();
 	return dev;
 }
···
 
 	rcu_read_lock();
 	dev = dev_get_by_index_rcu(net, ifindex);
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 	rcu_read_unlock();
 	return dev;
 }

net/core/drop_monitor.c

···
 	}
 
 	hw_metadata->input_dev = metadata->input_dev;
-	if (hw_metadata->input_dev)
-		dev_hold(hw_metadata->input_dev);
+	dev_hold(hw_metadata->input_dev);
 
 	return hw_metadata;
 
···
 static void
 net_dm_hw_metadata_free(const struct devlink_trap_metadata *hw_metadata)
 {
-	if (hw_metadata->input_dev)
-		dev_put(hw_metadata->input_dev);
+	dev_put(hw_metadata->input_dev);
 	kfree(hw_metadata->fa_cookie);
 	kfree(hw_metadata->trap_name);
 	kfree(hw_metadata->trap_group_name);

net/core/dst.c

···
 	      unsigned short flags)
 {
 	dst->dev = dev;
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 	dst->ops = ops;
 	dst_init_metrics(dst, dst_default_metrics.metrics, true);
 	dst->expires = 0UL;
···
 
 	if (dst->ops->destroy)
 		dst->ops->destroy(dst);
-	if (dst->dev)
-		dev_put(dst->dev);
+	dev_put(dst->dev);
 
 	lwtstate_put(dst->lwtstate);
 

net/core/neighbour.c

···
 	write_pnet(&n->net, net);
 	memcpy(n->key, pkey, key_len);
 	n->dev = dev;
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 
 	if (tbl->pconstructor && tbl->pconstructor(n)) {
-		if (dev)
-			dev_put(dev);
+		dev_put(dev);
 		kfree(n);
 		n = NULL;
 		goto out;
···
 			write_unlock_bh(&tbl->lock);
 			if (tbl->pdestructor)
 				tbl->pdestructor(n);
-			if (n->dev)
-				dev_put(n->dev);
+			dev_put(n->dev);
 			kfree(n);
 			return 0;
 		}
···
 		n->next = NULL;
 		if (tbl->pdestructor)
 			tbl->pdestructor(n);
-		if (n->dev)
-			dev_put(n->dev);
+		dev_put(n->dev);
 		kfree(n);
 	}
 	return -ENOENT;
···
 	list_del(&parms->list);
 	parms->dead = 1;
 	write_unlock_bh(&tbl->lock);
-	if (parms->dev)
-		dev_put(parms->dev);
+	dev_put(parms->dev);
 	call_rcu(&parms->rcu_head, neigh_rcu_free_parms);
 }
 EXPORT_SYMBOL(neigh_parms_release);

net/decnet/dn_dev.c

···
 	}
 	spin_unlock(&dndev_lock);
 
-	if (old)
-		dev_put(old);
+	dev_put(old);
 	return rv;
 }
 
···
 	}
 	spin_unlock(&dndev_lock);
 
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 }
 
 /*

net/decnet/dn_fib.c

···
 	}
 
 	change_nexthops(fi) {
-		if (nh->nh_dev)
-			dev_put(nh->nh_dev);
+		dev_put(nh->nh_dev);
 		nh->nh_dev = NULL;
 	} endfor_nexthops(fi);
 	kfree(fi);

net/decnet/dn_route.c

···
 	if (!fld.daddr) {
 		fld.daddr = fld.saddr;
 
-		if (dev_out)
-			dev_put(dev_out);
+		dev_put(dev_out);
 		err = -EINVAL;
 		dev_out = init_net.loopback_dev;
 		if (!dev_out->dn_ptr)
···
 					neigh_release(neigh);
 					neigh = NULL;
 				} else {
-					if (dev_out)
-						dev_put(dev_out);
+					dev_put(dev_out);
 					if (dn_dev_islocal(neigh->dev, fld.daddr)) {
 						dev_out = init_net.loopback_dev;
 						res.type = RTN_LOCAL;
···
 	if (res.type == RTN_LOCAL) {
 		if (!fld.saddr)
 			fld.saddr = fld.daddr;
-		if (dev_out)
-			dev_put(dev_out);
+		dev_put(dev_out);
 		dev_out = init_net.loopback_dev;
 		dev_hold(dev_out);
 		if (!dev_out->dn_ptr)
···
 	if (!fld.saddr)
 		fld.saddr = DN_FIB_RES_PREFSRC(res);
 
-	if (dev_out)
-		dev_put(dev_out);
+	dev_put(dev_out);
 	dev_out = DN_FIB_RES_DEV(res);
 	dev_hold(dev_out);
 	fld.flowidn_oif = dev_out->ifindex;
···
 		neigh_release(neigh);
 	if (free_res)
 		dn_fib_res_put(&res);
-	if (dev_out)
-		dev_put(dev_out);
+	dev_put(dev_out);
 out:
 	return err;
 
···
 	if (free_res)
 		dn_fib_res_put(&res);
 	dev_put(in_dev);
-	if (out_dev)
-		dev_put(out_dev);
+	dev_put(out_dev);
 out:
 	return err;
 

net/ethtool/netlink.c

···
 		ops->cleanup_data(reply_data);
 
 	genlmsg_end(rskb, reply_payload);
-	if (req_info->dev)
-		dev_put(req_info->dev);
+	dev_put(req_info->dev);
 	kfree(reply_data);
 	kfree(req_info);
 	return genlmsg_reply(rskb, info);
···
 	if (ops->cleanup_data)
 		ops->cleanup_data(reply_data);
 err_dev:
-	if (req_info->dev)
-		dev_put(req_info->dev);
+	dev_put(req_info->dev);
 	kfree(reply_data);
 	kfree(req_info);
 	return ret;

net/ieee802154/nl-phy.c

···
 out_dev:
 	wpan_phy_put(phy);
 out:
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 
 	return rc;
 }

net/ieee802154/nl802154.c

···
 		if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
 			struct wpan_dev *wpan_dev = info->user_ptr[1];
 
-			if (wpan_dev->netdev)
-				dev_put(wpan_dev->netdev);
+			dev_put(wpan_dev->netdev);
 		} else {
 			dev_put(info->user_ptr[1]);
 		}

net/ieee802154/socket.c

···
 		ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr);
 		rcu_read_lock();
 		dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr);
-		if (dev)
-			dev_hold(dev);
+		dev_hold(dev);
 		rcu_read_unlock();
 		break;
 	case IEEE802154_ADDR_SHORT:

net/ipv4/fib_semantics.c

···
 
 void fib_nh_common_release(struct fib_nh_common *nhc)
 {
-	if (nhc->nhc_dev)
-		dev_put(nhc->nhc_dev);
-
+	dev_put(nhc->nhc_dev);
 	lwtstate_put(nhc->nhc_lwtstate);
 	rt_fibinfo_free_cpus(nhc->nhc_pcpu_rth_output);
 	rt_fibinfo_free(&nhc->nhc_rth_input);

net/ipv4/icmp.c

···
 					 sizeof(struct in6_addr))
 				goto send_mal_query;
 			dev = ipv6_stub->ipv6_dev_find(net, &iio->ident.addr.ip_addr.ipv6_addr, dev);
-			if (dev)
-				dev_hold(dev);
+			dev_hold(dev);
 			break;
 #endif
 		default:

net/ipv4/route.c

···
 		new->output = dst_discard_out;
 
 		new->dev = net->loopback_dev;
-		if (new->dev)
-			dev_hold(new->dev);
+		dev_hold(new->dev);
 
 		rt->rt_is_input = ort->rt_is_input;
 		rt->rt_iif = ort->rt_iif;

net/ipv6/addrconf.c

···
 errout:
 	if (in6_dev)
 		in6_dev_put(in6_dev);
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 	return err;
 }
 
···
 errout_ifa:
 	in6_ifa_put(ifa);
 errout:
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 	if (fillargs.netnsid >= 0)
 		put_net(tgt_net);
 

net/ipv6/ip6mr.c

···
 	read_lock(&mrt_lock);
 	if (reg_vif_num >= 0)
 		reg_dev = mrt->vif_table[reg_vif_num].dev;
-	if (reg_dev)
-		dev_hold(reg_dev);
+	dev_hold(reg_dev);
 	read_unlock(&mrt_lock);
 
 	if (!reg_dev)

net/ipv6/route.c

···
 	if (err) {
 		lwtstate_put(fib6_nh->fib_nh_lws);
 		fib6_nh->fib_nh_lws = NULL;
-		if (dev)
-			dev_put(dev);
+		dev_put(dev);
 	}
 
 	return err;

net/llc/af_llc.c

···
 	} else {
 		release_sock(sk);
 	}
-	if (llc->dev)
-		dev_put(llc->dev);
+	dev_put(llc->dev);
 	sock_put(sk);
 	llc_sk_free(sk);
 out:
···
 	} else
 		llc->dev = dev_getbyhwaddr_rcu(&init_net, addr->sllc_arphrd,
 					   addr->sllc_mac);
-	if (llc->dev)
-		dev_hold(llc->dev);
+	dev_hold(llc->dev);
 	rcu_read_unlock();
 	if (!llc->dev)
 		goto out;

net/netfilter/nf_flow_table_offload.c

···
 	flow_offload_mangle(entry1, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 8,
 			    &val, &mask);
 
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 
 	return 0;
 }

net/netfilter/nf_queue.c

···
 	struct nf_hook_state *state = &entry->state;
 
 	/* Release those devices we held, or Alexey will kill me. */
-	if (state->in)
-		dev_put(state->in);
-	if (state->out)
-		dev_put(state->out);
+	dev_put(state->in);
+	dev_put(state->out);
 	if (state->sk)
 		sock_put(state->sk);
 
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-	if (entry->physin)
-		dev_put(entry->physin);
-	if (entry->physout)
-		dev_put(entry->physout);
+	dev_put(entry->physin);
+	dev_put(entry->physout);
 #endif
 }
 
···
 {
 	struct nf_hook_state *state = &entry->state;
 
-	if (state->in)
-		dev_hold(state->in);
-	if (state->out)
-		dev_hold(state->out);
+	dev_hold(state->in);
+	dev_hold(state->out);
 	if (state->sk)
 		sock_hold(state->sk);
 
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-	if (entry->physin)
-		dev_hold(entry->physin);
-	if (entry->physout)
-		dev_hold(entry->physout);
+	dev_hold(entry->physin);
+	dev_hold(entry->physout);
 #endif
 }
 EXPORT_SYMBOL_GPL(nf_queue_entry_get_refs);

net/netlabel/netlabel_unlabeled.c

···
 		netlbl_af4list_audit_addr(audit_buf, 1,
 					  (dev != NULL ? dev->name : NULL),
 					  addr->s_addr, mask->s_addr);
-		if (dev != NULL)
-			dev_put(dev);
+		dev_put(dev);
 		if (entry != NULL &&
 		    security_secid_to_secctx(entry->secid,
 					     &secctx, &secctx_len) == 0) {
···
 		netlbl_af6list_audit_addr(audit_buf, 1,
 					  (dev != NULL ? dev->name : NULL),
 					  addr, mask);
-		if (dev != NULL)
-			dev_put(dev);
+		dev_put(dev);
 		if (entry != NULL &&
 		    security_secid_to_secctx(entry->secid,
 					     &secctx, &secctx_len) == 0) {

net/netrom/nr_loopback.c

···
 		if (dev == NULL || nr_rx_frame(skb, dev) == 0)
 			kfree_skb(skb);
 
-		if (dev != NULL)
-			dev_put(dev);
+		dev_put(dev);
 
 		if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
 			mod_timer(&loopback_timer, jiffies + 10);

net/netrom/nr_route.c

···
 			if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
 				first = dev;
 	}
-	if (first)
-		dev_hold(first);
+	dev_hold(first);
 	rcu_read_unlock();
 
 	return first;

net/packet/af_packet.c

···
 
 	rcu_read_lock();
 	dev = rcu_dereference(po->cached_dev);
-	if (likely(dev))
-		dev_hold(dev);
+	dev_hold(dev);
 	rcu_read_unlock();
 
 	return dev;
···
 out_free:
 	kfree_skb(skb);
 out_unlock:
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 out:
 	return err;
 }
···
 		}
 	}
 
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 
 	proto_curr = po->prot_hook.type;
 	dev_curr = po->prot_hook.dev;
···
 			packet_cached_dev_assign(po, dev);
 		}
 	}
-	if (dev_curr)
-		dev_put(dev_curr);
+	dev_put(dev_curr);
 
 	if (proto == 0 || !need_rehook)
 		goto out_unlock;
···
 				if (msg == NETDEV_UNREGISTER) {
 					packet_cached_dev_reset(po);
 					WRITE_ONCE(po->ifindex, -1);
-					if (po->prot_hook.dev)
-						dev_put(po->prot_hook.dev);
+					dev_put(po->prot_hook.dev);
 					po->prot_hook.dev = NULL;
 				}
 				spin_unlock(&po->bind_lock);

net/phonet/af_phonet.c

···
 
 drop:
 	kfree_skb(skb);
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 	return err;
 }
 EXPORT_SYMBOL(pn_skb_send);

net/phonet/pn_dev.c

···
 			break;
 		dev = NULL;
 	}
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 	rcu_read_unlock();
 	return dev;
 }
···
 	daddr >>= 2;
 	rcu_read_lock();
 	dev = rcu_dereference(routes->table[daddr]);
-	if (dev)
-		dev_hold(dev);
+	dev_hold(dev);
 	rcu_read_unlock();
 
 	if (!dev)

net/phonet/socket.c

···
 			saddr = PN_NO_ADDR;
 		release_sock(sk);
 
-		if (dev)
-			dev_put(dev);
+		dev_put(dev);
 		if (saddr == PN_NO_ADDR)
 			return -EHOSTUNREACH;
 

net/sched/act_mirred.c

···
 
 	/* last reference to action, no need to lock */
 	dev = rcu_dereference_protected(m->tcfm_dev, 1);
-	if (dev)
-		dev_put(dev);
+	dev_put(dev);
 }
 
 static const struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
···
 		mac_header_xmit = dev_is_mac_header_xmit(dev);
 		dev = rcu_replace_pointer(m->tcfm_dev, dev,
 					  lockdep_is_held(&m->tcf_lock));
-		if (dev)
-			dev_put(dev);
+		dev_put(dev);
 		m->tcfm_mac_header_xmit = mac_header_xmit;
 	}
 	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);

net/smc/smc_ib.c

···
 			if (!libdev->ops.get_netdev)
 				continue;
 			lndev = libdev->ops.get_netdev(libdev, i + 1);
-			if (lndev)
-				dev_put(lndev);
+			dev_put(lndev);
 			if (lndev != ndev)
 				continue;
 			if (event == NETDEV_REGISTER)

net/smc/smc_pnet.c

···
 	return 0;
 
 out_put:
-	if (ndev)
-		dev_put(ndev);
+	dev_put(ndev);
 	return rc;
 }
 

net/wireless/nl80211.c

···
 	err = rdev_change_station(rdev, dev, mac_addr, &params);
 
  out_put_vlan:
-	if (params.vlan)
-		dev_put(params.vlan);
+	dev_put(params.vlan);
 
 	return err;
 }
···
 
 	err = rdev_add_station(rdev, dev, mac_addr, &params);
 
-	if (params.vlan)
-		dev_put(params.vlan);
+	dev_put(params.vlan);
 	return err;
 }
 
···
 		goto out_free;
 
 	nl80211_send_scan_start(rdev, wdev);
-	if (wdev->netdev)
-		dev_hold(wdev->netdev);
+	dev_hold(wdev->netdev);
 
 	return 0;
 
···
 			return -ENETDOWN;
 		}
 
-		if (dev)
-			dev_hold(dev);
-
+		dev_hold(dev);
 		info->user_ptr[0] = rdev;
 	}
 
···
 		if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
 			struct wireless_dev *wdev = info->user_ptr[1];
 
-			if (wdev->netdev)
-				dev_put(wdev->netdev);
+			dev_put(wdev->netdev);
 		} else {
 			dev_put(info->user_ptr[1]);
 		}

net/wireless/scan.c

···
 	}
 #endif
 
-	if (wdev->netdev)
-		dev_put(wdev->netdev);
+	dev_put(wdev->netdev);
 
 	kfree(rdev->int_scan_req);
 	rdev->int_scan_req = NULL;