Subject: [PATCH 17/39] udp6: fix encap return code for resubmitting

From: Paolo Abeni <[email-masked]>
Date: Wed, 17 Oct 2018 11:44:04 +0200

[ Upstream commit 84dad55951b0d009372ec21760b650634246e144 ]

The commit eb63f2964dbe ("udp6: add missing checks on edumux packet
processing") used the same return code convention of the ipv4 counterpart,
but ipv6 uses the opposite one: positive values means resubmit.

This change addresses the issue, using positive return value for
resubmitting. Also update the related comment, which was broken, too.

Fixes: eb63f2964dbe ("udp6: add missing checks on edumux packet processing")
Signed-off-by: Paolo Abeni <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 net/ipv6/udp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 39d0cab919bb..4f2c7a196365 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -762,11 +762,9 @@ static int udp6_unicast_rcv_skb(struct sock *sk, struct sk_buff *skb,
 
 	ret = udpv6_queue_rcv_skb(sk, skb);
 
-	/* a return value > 0 means to resubmit the input, but
-	 * it wants the return to be -protocol, or 0
-	 */
+	/* a return value > 0 means to resubmit the input */
 	if (ret > 0)
-		return -ret;
+		return ret;
 	return 0;
 }
 
-- 
2.19.1