net/mlx5: fix VLAN configuration after port stop

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")
Cc: stable@dpdk.org
Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>

diff --git a/drivers/net/mlx5/mlx5_vlan.c b/drivers/net/mlx5/mlx5_vlan.c
index 6fc315e..198a69e 100644 (file)
--- 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,