kernel-5.4: bump to 5.4.102 and refresh patches

5.4.102 backported a lot of stuff that our WireGuard backport already
did, in addition to other patches we had, so those patches were
removed from that part of the series. In the process other patches were
refreshed or reworked to account for upstream changes.

This commit involved `update_kernel.sh -v -u 5.4`.

Cc: John Audia <graysky@archlinux.us>
Cc: David Bauer <mail@david-bauer.net>
Cc: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0111-wireguard-queueing-make-use-of-ip_tunnel_parse_proto.patch b/target/linux/generic/backport-5.4/080-wireguard-0111-wireguard-queueing-make-use-of-ip_tunnel_parse_proto.patch
new file mode 100644
index 0000000000..a777732ce7
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0111-wireguard-queueing-make-use-of-ip_tunnel_parse_proto.patch
@@ -0,0 +1,68 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Mon, 29 Jun 2020 19:06:21 -0600
+Subject: [PATCH] wireguard: queueing: make use of ip_tunnel_parse_protocol
+
+commit 1a574074ae7d1d745c16f7710655f38a53174c27 upstream.
+
+Now that wg_examine_packet_protocol has been added for general
+consumption as ip_tunnel_parse_protocol, it's possible to remove
+wg_examine_packet_protocol and simply use the new
+ip_tunnel_parse_protocol function directly.
+
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/queueing.h | 19 ++-----------------
+ drivers/net/wireguard/receive.c  |  2 +-
+ 2 files changed, 3 insertions(+), 18 deletions(-)
+
+--- a/drivers/net/wireguard/queueing.h
++++ b/drivers/net/wireguard/queueing.h
+@@ -11,6 +11,7 @@
+ #include <linux/skbuff.h>
+ #include <linux/ip.h>
+ #include <linux/ipv6.h>
++#include <net/ip_tunnels.h>
+ 
+ struct wg_device;
+ struct wg_peer;
+@@ -65,25 +66,9 @@ struct packet_cb {
+ #define PACKET_CB(skb) ((struct packet_cb *)((skb)->cb))
+ #define PACKET_PEER(skb) (PACKET_CB(skb)->keypair->entry.peer)
+ 
+-/* Returns either the correct skb->protocol value, or 0 if invalid. */
+-static inline __be16 wg_examine_packet_protocol(struct sk_buff *skb)
+-{
+-	if (skb_network_header(skb) >= skb->head &&
+-	    (skb_network_header(skb) + sizeof(struct iphdr)) <=
+-		    skb_tail_pointer(skb) &&
+-	    ip_hdr(skb)->version == 4)
+-		return htons(ETH_P_IP);
+-	if (skb_network_header(skb) >= skb->head &&
+-	    (skb_network_header(skb) + sizeof(struct ipv6hdr)) <=
+-		    skb_tail_pointer(skb) &&
+-	    ipv6_hdr(skb)->version == 6)
+-		return htons(ETH_P_IPV6);
+-	return 0;
+-}
+-
+ static inline bool wg_check_packet_protocol(struct sk_buff *skb)
+ {
+-	__be16 real_protocol = wg_examine_packet_protocol(skb);
++	__be16 real_protocol = ip_tunnel_parse_protocol(skb);
+ 	return real_protocol && skb->protocol == real_protocol;
+ }
+ 
+--- a/drivers/net/wireguard/receive.c
++++ b/drivers/net/wireguard/receive.c
+@@ -387,7 +387,7 @@ static void wg_packet_consume_data_done(
+ 	 */
+ 	skb->ip_summed = CHECKSUM_UNNECESSARY;
+ 	skb->csum_level = ~0; /* All levels */
+-	skb->protocol = wg_examine_packet_protocol(skb);
++	skb->protocol = ip_tunnel_parse_protocol(skb);
+ 	if (skb->protocol == htons(ETH_P_IP)) {
+ 		len = ntohs(ip_hdr(skb)->tot_len);
+ 		if (unlikely(len < sizeof(struct iphdr)))