From c4b686e0bbfff67d1b8e32fc72935194c3a37e4f Mon Sep 17 00:00:00 2001
From: Hemant Agrawal <hemant.agrawal@nxp.com>
Date: Fri, 19 Jul 2019 15:36:08 +0530
Subject: [PATCH] net/dpaa: check multi-segment external buffers

[ upstream commit 829904201f0a3a43c740d64e216167265bc34ffa ]

This patch add check to return error as the handling
for external buffer packets with SG is currently missing.

Fixes: 37f9b54bd3cf ("net/dpaa: support Tx and Rx queue setup")

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 drivers/net/dpaa/dpaa_rxtx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/dpaa/dpaa_rxtx.c b/drivers/net/dpaa/dpaa_rxtx.c
index c4471c2274..ba01bd17e6 100644
--- a/drivers/net/dpaa/dpaa_rxtx.c
+++ b/drivers/net/dpaa/dpaa_rxtx.c
@@ -952,6 +952,16 @@ dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 					goto send_pkts;
 				}
 			} else {
+				/* TODO not supporting sg for external bufs*/
+				if (unlikely(mbuf->nb_segs > 1)) {
+					/* Set frames_to_send & nb_bufs so
+					 * that packets are transmitted till
+					 * previous frame.
+					 */
+					frames_to_send = loop;
+					nb_bufs = loop;
+					goto send_pkts;
+				}
 				state = tx_on_external_pool(q, mbuf,
 							    &fd_arr[loop]);
 				if (unlikely(state)) {