[PATCH v2 4/4] net: thunderx: Allow IPv6 frames with zero UDP checksum

From: sunil . kovvuri
Date: Tue Mar 07 2017 - 07:49:11 EST


From: Thanneeru Srinivasulu <tsrinivasulu@xxxxxxxxxx>

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

Signed-off-by: Thanneeru Srinivasulu <tsrinivasulu@xxxxxxxxxx>
Signed-off-by: Sunil Goutham <sgoutham@xxxxxxxxxx>
---
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 b1962db..f13289f 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -622,9 +622,11 @@ 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