[TCP]: Dont tcp_listen_unlock unless it was locked.

69e0d18e · Anders Gustafsson · David S. Miller · bcd998aa · 69e0d18e
Commit 69e0d18e authored Jan 12, 2003 by Anders Gustafsson Committed by David S. Miller Jan 12, 2003
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net/ipv4/tcp_ipv4.c net/ipv4/tcp_ipv4.c +2 -1

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--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2412,7 +2412,8 @@ static void tcp_seq_stop(struct seq_file *seq, void *v)
 			read_unlock_bh(&tp->syn_wait_lock);
 		}
 	case TCP_SEQ_STATE_LISTENING:
-		tcp_listen_unlock();
+		if (v != (void *)1)
+			tcp_listen_unlock();
 		break;
 	case TCP_SEQ_STATE_TIME_WAIT:
 	case TCP_SEQ_STATE_ESTABLISHED: