tcp: remove one indentation level in tcp_rcv_state_process()

Remove one level of indentation 'introduced' in commit
c3ae62af (tcp: should drop incoming frames without ACK flag set)

if (true) {
        ...
}

@acceptable variable is a boolean.

This patch is a pure cleanup.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp_input.c

@@ -5536,6 +5536,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct request_sock *req;
 	int queued = 0;
+	bool acceptable;
 
 	tp->rx_opt.saw_tstamp = 0;
 
@@ -5606,8 +5607,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 		return 0;
 
 	/* step 5: check the ACK field */
-	if (true) {
-		int acceptable = tcp_ack(sk, skb, FLAG_SLOWPATH |
+	acceptable = tcp_ack(sk, skb, FLAG_SLOWPATH |
 				      FLAG_UPDATE_TS_RECENT) > 0;
 
 	switch (sk->sk_state) {
@@ -5642,8 +5642,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 			 * NULL and sk->sk_socket == NULL.
 			 */
 			if (sk->sk_socket)
-					sk_wake_async(sk,
-						      SOCK_WAKE_IO, POLL_OUT);
+				sk_wake_async(sk, SOCK_WAKE_IO, POLL_OUT);
 
 			tp->snd_una = TCP_SKB_CB(skb)->ack_seq;
 			tp->snd_wnd = ntohs(th->window) <<
@@ -5659,10 +5658,9 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 				 * to the regular data transmission case
 				 * when new data has just been ack'ed.
 				 *
-					 * (TFO) - we could try to be more
-					 * aggressive and retranmitting any data
-					 * sooner based on when they were sent
-					 * out.
+				 * (TFO) - we could try to be more aggressive
+				 * and retransmitting any data sooner based
+				 * on when they are sent out.
 				 */
 				tcp_rearm_rto(sk);
 			} else
@@ -5709,10 +5707,10 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 			if (dst)
 				dst_confirm(dst);
 
-				if (!sock_flag(sk, SOCK_DEAD))
+			if (!sock_flag(sk, SOCK_DEAD)) {
 				/* Wake up lingering close() */
 				sk->sk_state_change(sk);
-				else {
+			} else {
 				int tmo;
 
 				if (tp->linger2 < 0 ||
@@ -5757,7 +5755,6 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 		}
 		break;
 	}
-	}
 
 	/* step 6: check the URG bit */
 	tcp_urg(sk, skb, th);