Merge branch 'kfree_skb-NULL'

zhong jiang says:

====================
net: remove redundant null pointer check before kfree_skb

The issue is detected with the help of Coccinelle.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c

@@ -3422,7 +3422,6 @@ static void remove_one(struct pci_dev *pdev)
 				free_netdev(adapter->port[i]);
 
 		iounmap(adapter->regs);
-		if (adapter->nofail_skb)
 		kfree_skb(adapter->nofail_skb);
 		kfree(adapter);
 		pci_release_regions(pdev);

drivers/net/ethernet/chelsio/cxgb3/cxgb3_offload.c

@@ -1302,7 +1302,6 @@ void cxgb3_offload_deactivate(struct adapter *adapter)
 	rcu_read_unlock();
 	RCU_INIT_POINTER(tdev->l2opt, NULL);
 	call_rcu(&d->rcu_head, clean_l2_data);
-	if (t->nofail_skb)
 	kfree_skb(t->nofail_skb);
 	kfree(t);
 }

drivers/net/tap.c

@@ -830,7 +830,6 @@ static ssize_t tap_do_read(struct tap_queue *q,
 	ssize_t ret = 0;
 
 	if (!iov_iter_count(to)) {
-		if (skb)
 		kfree_skb(skb);
 		return 0;
 	}
@@ -1236,7 +1235,6 @@ static int tap_recvmsg(struct socket *sock, struct msghdr *m,
 	struct sk_buff *skb = m->msg_control;
 	int ret;
 	if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) {
-		if (skb)
 		kfree_skb(skb);
 		return -EINVAL;
 	}

net/ipv4/ip_fragment.c

@@ -260,7 +260,6 @@ static void ip_expire(struct timer_list *t)
 	spin_unlock(&qp->q.lock);
 out_rcu_unlock:
 	rcu_read_unlock();
-	if (head)
 	kfree_skb(head);
 	ipq_put(qp);
 }

net/ipv6/af_inet6.c

@@ -468,11 +468,9 @@ void inet6_destroy_sock(struct sock *sk)
 	/* Release rx options */
 
 	skb = xchg(&np->pktoptions, NULL);
-	if (skb)
 	kfree_skb(skb);
 
 	skb = xchg(&np->rxpmtu, NULL);
-	if (skb)
 	kfree_skb(skb);
 
 	/* Free flowlabels */

net/nfc/nci/uart.c

@@ -192,9 +192,7 @@ static void nci_uart_tty_close(struct tty_struct *tty)
 	if (!nu)
 		return;
 
-	if (nu->tx_skb)
 	kfree_skb(nu->tx_skb);
-	if (nu->rx_skb)
 	kfree_skb(nu->rx_skb);
 
 	skb_queue_purge(&nu->tx_q);