[dpdk-stable] patch 'net/mlx5: fix VLAN configuration after port stop' has been queued to LTS release 17.11.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 17.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/26/18. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 2e82fea4f48a86682273e37c9fddec390bac1cc9 Mon Sep 17 00:00:00 2001
From: Shahaf Shuler <shahafs at mellanox.com>
Date: Wed, 13 Dec 2017 16:03:10 +0200
Subject: [PATCH] net/mlx5: fix VLAN configuration after port stop

[ upstream commit 3a76da0ac85ff90280ec612dd444a553a4782f7b ]

Ethdev layer has an API to configure vlan setting on the flight, i.e.
when the port state is start.

Calling such API when the port is stopped may cause segmentation fault
as the related Verbs contexts has not been created yet.

Fixes: 09cb5b581762 ("net/mlx5: separate DPDK from verbs Rx queue objects")

Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
---
 drivers/net/mlx5/mlx5_vlan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_vlan.c b/drivers/net/mlx5/mlx5_vlan.c
index 6fc315e..198a69e 100644
--- a/drivers/net/mlx5/mlx5_vlan.c
+++ b/drivers/net/mlx5/mlx5_vlan.c
@@ -127,6 +127,11 @@ priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on)
 
 	DEBUG("set VLAN offloads 0x%x for port %d queue %d",
 	      vlan_offloads, rxq->port_id, idx);
+	if (!rxq_ctrl->ibv) {
+		/* Update related bits in RX queue. */
+		rxq->vlan_strip = !!on;
+		return;
+	}
 	mod = (struct ibv_wq_attr){
 		.attr_mask = IBV_WQ_ATTR_FLAGS,
 		.flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
-- 
2.7.4