[dpdk-stable] patch 'net/nfp: fix packet/data length conversion' has been queued to stable release 17.02.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 2c37c9c3d3cde91c909e24f6e332a7747fca0197 Mon Sep 17 00:00:00 2001
From: Alejandro Lucero <alejandro.lucero at netronome.com>
Date: Tue, 21 Mar 2017 10:43:20 +0000
Subject: [PATCH] net/nfp: fix packet/data length conversion

[ upstream commit 19ac8c75df90ef90ef8100b13ee3fed2da5a5ac7 ]

Chained mbufs hold data_len as the length of that particular mbuf
and pkt_len as the full packet length including all the chained
mbufs. It is not clear from the mbuf definition if pkt_len should
be set for all the mbufs in a chain, but code there for handling
mbufs suggests just the first mbuf requires to have pkt_len set.

NFP PMD was assuming pkt_len is set in all the chained mbufs and
unit tests for gather dma were building mbufs with pkt_len always
set. This patch gets rid of that assumption.

Fixes: b812daadad0d ("nfp: add Rx and Tx")

Signed-off-by: Alejandro Lucero <alejandro.lucero at netronome.com>
---
 drivers/net/nfp/nfp_net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 7b9b274..e402ea6 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -2102,6 +2102,7 @@ nfp_net_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		 * Checksum and VLAN flags just in the first descriptor for a
 		 * multisegment packet, but TSO info needs to be in all of them.
 		 */
+		txd.data_len = pkt->pkt_len;
 		nfp_net_tx_tso(txq, &txd, pkt);
 		nfp_net_tx_cksum(txq, &txd, pkt);
 
@@ -2137,7 +2138,7 @@ nfp_net_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 
 			/* Filling descriptors fields */
 			txds->dma_len = dma_size;
-			txds->data_len = pkt->pkt_len;
+			txds->data_len = txd.data_len;
 			txds->dma_addr_hi = (dma_addr >> 32) & 0xff;
 			txds->dma_addr_lo = (dma_addr & 0xffffffff);
 			ASSERT(free_descs > 0);
-- 
1.9.0