From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Fri, 14 Feb 2020 23:57:23 +0100
Subject: wireguard: socket: remove extra call to synchronize_net
Patch-mainline: v5.6-rc3
Git-commit: 1fbc33b0a7feb6ca72bf7dc8a05d81485ee8ee2e
References: bsc#1169021 jsc#SLE-12250

synchronize_net() is a wrapper around synchronize_rcu(), so there's no
point in having synchronize_net and synchronize_rcu back to back,
despite the documentation comment suggesting maybe it's somewhat useful,
"Wait for packets currently being received to be done." This commit
removes the extra call.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Nicolai Stange <nstange@suse.de>
---
 drivers/net/wireguard/socket.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/net/wireguard/socket.c
+++ b/drivers/net/wireguard/socket.c
@@ -432,7 +432,6 @@ void wg_socket_reinit(struct wg_device *
 		wg->incoming_port = ntohs(inet_sk(new4)->inet_sport);
 	mutex_unlock(&wg->socket_update_lock);
 	synchronize_rcu();
-	synchronize_net();
 	sock_free(old4);
 	sock_free(old6);
 }