From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Fri, 17 Aug 2018 14:30:22 +0000 (+0530)
Subject: net/octeontx: fix packet corruption on Tx
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=9f92552eb997819d8af80b0634849070075cce2a;p=dpdk.git

net/octeontx: fix packet corruption on Tx

LMTST does not guarantee packet content get synced with L2C when
HW access the packet for transmitting.

Adding coherent IO write barrier will make sure HW sees the correct
packet if its modified.

Fixes: 9e747589bd4c ("net/octeontx: add packet transmit burst function")
Cc: stable@dpdk.org

Reported-by: Vikas Aggarwal <vikas.aggarwal@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
---

diff --git a/drivers/net/octeontx/octeontx_rxtx.c b/drivers/net/octeontx/octeontx_rxtx.c
index a9149b4e12..f861313e60 100644
--- a/drivers/net/octeontx/octeontx_rxtx.c
+++ b/drivers/net/octeontx/octeontx_rxtx.c
@@ -63,6 +63,7 @@ octeontx_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 
 	count = 0;
 
+	rte_cio_wmb();
 	while (count < nb_pkts) {
 		res = __octeontx_xmit_pkts(dq->lmtline_va, dq->ioreg_va,
 					   dq->fc_status_va,