[dpdk-stable] [PATCH] net/mlx5: fix transmit descriptor with VLAN insertions

[Matan Azrad]

From: Viacheslav Ovsiienko
> If VLAN tag insertion transmit offload is engaged
> (DEV_TX_OFFLOAD_VLAN_INSERT in tx queue configuration is set) the
> transmit descriptor may be built with wrong format, due to packet length is
> not adjusted. Also, the ring buffer wrapup is not handled correctly.
> 
> Fixes: 18a1c20044c0 ("net/mlx5: implement Tx burst template")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>