[dpdk-stable] patch 'app/testpmd: fix forward ports update' has been queued to LTS release 17.11.3

[Yuanhan Liu <yliu@fridaylinux.org>]

Hi,

FYI, your patch has been queued to LTS release 17.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/27/18. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 0a533fcda52d3b74b19d80f34958efdb2bd3c8ba Mon Sep 17 00:00:00 2001
From: Matan Azrad <matan@mellanox.com>
Date: Thu, 3 May 2018 10:31:44 +0000
Subject: [PATCH] app/testpmd: fix forward ports update

[ upstream commit 1f84c4695a567edc8cd8dc2572aa320cdeb9c358 ]

When the forward ports are changed either by new portlist\portmask
configurations or by a port detachment, all the old forward streams
are freed and new streams are allocated to be aligned with the new
forward ports.

If the number of the forward ports drops to 0, there is an attempt
to wrongly allocate 0 memory for the streams.

Skip the streams memory allocation if no forward ports are configured.

Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings")

Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 app/test-pmd/testpmd.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 03c9aa7f8..254bd9449 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -880,18 +880,23 @@ init_fwd_streams(void)
 
 	/* init new */
 	nb_fwd_streams = nb_fwd_streams_new;
-	fwd_streams = rte_zmalloc("testpmd: fwd_streams",
-		sizeof(struct fwd_stream *) * nb_fwd_streams, RTE_CACHE_LINE_SIZE);
-	if (fwd_streams == NULL)
-		rte_exit(EXIT_FAILURE, "rte_zmalloc(%d (struct fwd_stream *)) "
-						"failed\n", nb_fwd_streams);
-
-	for (sm_id = 0; sm_id < nb_fwd_streams; sm_id++) {
-		fwd_streams[sm_id] = rte_zmalloc("testpmd: struct fwd_stream",
-				sizeof(struct fwd_stream), RTE_CACHE_LINE_SIZE);
-		if (fwd_streams[sm_id] == NULL)
-			rte_exit(EXIT_FAILURE, "rte_zmalloc(struct fwd_stream)"
-								" failed\n");
+	if (nb_fwd_streams) {
+		fwd_streams = rte_zmalloc("testpmd: fwd_streams",
+			sizeof(struct fwd_stream *) * nb_fwd_streams,
+			RTE_CACHE_LINE_SIZE);
+		if (fwd_streams == NULL)
+			rte_exit(EXIT_FAILURE, "rte_zmalloc(%d"
+				 " (struct fwd_stream *)) failed\n",
+				 nb_fwd_streams);
+
+		for (sm_id = 0; sm_id < nb_fwd_streams; sm_id++) {
+			fwd_streams[sm_id] = rte_zmalloc("testpmd:"
+				" struct fwd_stream", sizeof(struct fwd_stream),
+				RTE_CACHE_LINE_SIZE);
+			if (fwd_streams[sm_id] == NULL)
+				rte_exit(EXIT_FAILURE, "rte_zmalloc"
+					 "(struct fwd_stream) failed\n");
+		}
 	}
 
 	return 0;
-- 
2.11.0