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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Igor Russkikh <igor.russkikh@aquantia.com>,
        Nikita Danilov <nikita.danilov@aquantia.com>,
        Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>,
        "David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.14 020/107] net: aquantia: fix rx checksum offload for UDP/TCP over IPv6
Date:   Mon,  1 Apr 2019 19:01:35 +0200
Message-Id: <20190401170047.388409841@linuxfoundation.org>
In-Reply-To: <20190401170045.246405031@linuxfoundation.org>
References: <20190401170045.246405031@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>

[ Upstream commit a7faaa0c5dc7d091cc9f72b870d7edcdd6f43f12 ]

TCP/UDP checksum validity was propagated to skb
only if IP checksum is valid.
But for IPv6 there is no validity as there is no checksum in IPv6.
This patch propagates TCP/UDP checksum validity regardless of IP checksum.

Fixes: 018423e90bee ("net: ethernet: aquantia: Add ring support code")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Nikita Danilov <nikita.danilov@aquantia.com>
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/aquantia/atlantic/aq_ring.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
@@ -270,11 +270,12 @@ int aq_ring_rx_clean(struct aq_ring_s *s
 		} else {
 			if (buff->is_ip_cso) {
 				__skb_incr_checksum_unnecessary(skb);
-				if (buff->is_udp_cso || buff->is_tcp_cso)
-					__skb_incr_checksum_unnecessary(skb);
 			} else {
 				skb->ip_summed = CHECKSUM_NONE;
 			}
+
+			if (buff->is_udp_cso || buff->is_tcp_cso)
+				__skb_incr_checksum_unnecessary(skb);
 		}
 
 		skb_set_hash(skb, buff->rss_hash,