net/ipv6: Convert icmpv6_push_pending_frames to void

commit cc71b7b0 ("net/ipv6: remove unused err variable on
icmpv6_push_pending_frames") exposed icmpv6_push_pending_frames
return value not being used.

Remove now unnecessary int err declarations and uses.

Miscellanea:

o Remove unnecessary goto and out: labels
o Realign arguments
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ipv6.h

@@ -300,7 +300,7 @@ static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 
 void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
 
-int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
+void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 				struct icmp6hdr *thdr, int len);
 
 int ip6_ra_control(struct sock *sk, int sel);

net/ipv6/icmp.c

@@ -250,7 +250,7 @@ static bool opt_unrec(struct sk_buff *skb, __u32 offset)
 	return (*op & 0xC0) == 0x80;
 }
 
-int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
+void icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 				struct icmp6hdr *thdr, int len)
 {
 	struct sk_buff *skb;
@@ -258,7 +258,7 @@ int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 
 	skb = skb_peek(&sk->sk_write_queue);
 	if (!skb)
-		goto out;
+		return;
 
 	icmp6h = icmp6_hdr(skb);
 	memcpy(icmp6h, thdr, sizeof(struct icmp6hdr));
@@ -286,8 +286,6 @@ int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 						      tmp_csum);
 	}
 	ip6_push_pending_frames(sk);
-out:
-	return 0;
 }
 
 struct icmpv6_msg {
@@ -437,7 +435,6 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
 	int iif = 0;
 	int addr_type = 0;
 	int len;
-	int err = 0;
 	u32 mark = IP6_REPLY_MARK(net, skb->mark);
 
 	if ((u8 *)hdr < skb->head ||
@@ -574,16 +571,15 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
 	rcu_read_lock();
 	idev = __in6_dev_get(skb->dev);
 
-	err = ip6_append_data(sk, icmpv6_getfrag, &msg,
+	if (ip6_append_data(sk, icmpv6_getfrag, &msg,
 			    len + sizeof(struct icmp6hdr),
 			    sizeof(struct icmp6hdr),
 			    &ipc6, &fl6, (struct rt6_info *)dst,
-			      MSG_DONTWAIT, &sockc_unused);
-	if (err) {
+			    MSG_DONTWAIT, &sockc_unused)) {
 		ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
 	} else {
-		err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
+		icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
 					   len + sizeof(struct icmp6hdr));
 	}
 	rcu_read_unlock();
@@ -681,7 +677,6 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	struct icmpv6_msg msg;
 	struct dst_entry *dst;
 	struct ipcm6_cookie ipc6;
-	int err = 0;
 	u32 mark = IP6_REPLY_MARK(net, skb->mark);
 	struct sockcm_cookie sockc_unused = {0};
 
@@ -718,8 +713,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	else if (!fl6.flowi6_oif)
 		fl6.flowi6_oif = np->ucast_oif;
 
-	err = ip6_dst_lookup(net, sk, &dst, &fl6);
-	if (err)
+	if (ip6_dst_lookup(net, sk, &dst, &fl6))
 		goto out;
 	dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);
 	if (IS_ERR(dst))
@@ -736,16 +730,15 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	ipc6.dontfrag = np->dontfrag;
 	ipc6.opt = NULL;
 
-	err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
+	if (ip6_append_data(sk, icmpv6_getfrag, &msg,
+			    skb->len + sizeof(struct icmp6hdr),
 			    sizeof(struct icmp6hdr), &ipc6, &fl6,
 			    (struct rt6_info *)dst, MSG_DONTWAIT,
-				&sockc_unused);
-
-	if (err) {
+			    &sockc_unused)) {
 		__ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
 	} else {
-		err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
+		icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
 					   skb->len + sizeof(struct icmp6hdr));
 	}
 	dst_release(dst);

net/ipv6/ping.c

@@ -154,9 +154,8 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 				ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
 	} else {
-		err = icmpv6_push_pending_frames(sk, &fl6,
-						 (struct icmp6hdr *) &pfh.icmph,
-						 len);
+		icmpv6_push_pending_frames(sk, &fl6,
+					   (struct icmp6hdr *)&pfh.icmph, len);
 	}
 	release_sock(sk);