netdev - [PATCH 4/4] net: thunderx: Allow IPv6 frames with zero UDP checksum

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Date:   Fri,  3 Mar 2017 16:17:50 +0530
From:   sunil.kovvuri@...il.com
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Thanneeru Srinivasulu <tsrinivasulu@...ium.com>,
        Sunil Goutham <sgoutham@...ium.com>
Subject: [PATCH 4/4] net: thunderx: Allow IPv6 frames with zero UDP checksum

From: Thanneeru Srinivasulu <tsrinivasulu@...ium.com>

Do not consider IPv6 frames with zero UDP checksum as frames
with bad checksum and drop them.

Signed-off-by: Thanneeru Srinivasulu <tsrinivasulu@...ium.com>
Signed-off-by: Sunil Goutham <sgoutham@...ium.com>
---
 drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
index ee3aa16..77a86a6 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -657,9 +657,11 @@ static void nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
 	nicvf_send_msg_to_pf(nic, &mbx);
 
 	if (!nic->sqs_mode && (qidx == 0)) {
-		/* Enable checking L3/L4 length and TCP/UDP checksums */
+		/* Enable checking L3/L4 length and TCP/UDP checksums
+		 * Also allow IPv6 pkts with zero UDP checksum.
+		 */
 		nicvf_queue_reg_write(nic, NIC_QSET_RQ_GEN_CFG, 0,
-				      (BIT(24) | BIT(23) | BIT(21)));
+				      (BIT(24) | BIT(23) | BIT(21) | BIT(20)));
 		nicvf_config_vlan_stripping(nic, nic->netdev->features);
 	}
 
-- 
2.7.4