From 1be451d993170d6933c8aa5d80585595f149805f Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Wed, 12 Jun 2019 10:30:58 +0200
Subject: [PATCH] xfrm: fix bogus WARN_ON with ipv6

net/xfrm/xfrm_input.c:378:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
skb->protocol = htons(ETH_P_IPV6);

... the fallthrough then causes a bogus WARN_ON().

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 4c203b0454b ("xfrm: remove eth_proto value from xfrm_state_afinfo")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
 net/xfrm/xfrm_input.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 8a00cc94c32c..6088bc2dc11e 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -376,6 +376,7 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
 		break;
 	case AF_INET6:
 		skb->protocol = htons(ETH_P_IPV6);
+		break;
 	default:
 		WARN_ON_ONCE(1);
 		break;