linux-kernel - No networking due to "net/mlx5e: Add support for devlink-port in non-representors mode"

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Date:   Wed, 25 Mar 2020 00:01:17 -0400
From:   Qian Cai <cai@....pw>
To:     Vladyslav Tarasiuk <vladyslavt@...lanox.com>
Cc:     Moshe Shemesh <moshe@...lanox.com>, Jiri Pirko <jiri@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Parav Pandit <parav@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: No networking due to "net/mlx5e: Add support for devlink-port in
 non-representors mode"

Reverted the linux-next commit c6acd629ee (“net/mlx5e: Add support for devlink-port in non-representors mode”)
and its dependencies,

162add8cbae4 (“net/mlx5e: Use devlink virtual flavour for VF devlink port”)
31e87b39ba9d (“net/mlx5e: Fix devlink port register sequence”)

on the top of next-20200324 allowed NICs to obtain an IPv4 address from DHCP again.

0b:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
0b:00.1 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

[  223.280777][   T13] mlx5_core 0000:0b:00.0: firmware version: 14.21.1000
[  223.287753][   T13] mlx5_core 0000:0b:00.0: 63.008 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x8 link)
[  226.292153][    C0] mlx5_core 0000:0b:00.0: Port module event: module 0, Cable plugged
[  226.874100][ T2023] mlx5_core 0000:0b:00.1: Adding to iommu group 2
[  227.343553][   T13] mlx5_core 0000:0b:00.1: firmware version: 14.21.1000
[  227.350467][   T13] mlx5_core 0000:0b:00.1: 63.008 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x8 link)
[  230.026346][    C0] mlx5_core 0000:0b:00.1: Port module event: module 1, Cable unplugged
[  230.522660][ T2023] mlx5_core 0000:0b:00.0: MLX5E: StrdRq(0) RqSz(1024) StrdSz(256) RxCqeCmprss(0)
[  231.448493][ T2023] mlx5_core 0000:0b:00.1: MLX5E: StrdRq(0) RqSz(1024) StrdSz(256) RxCqeCmprss(0)
[  232.436993][ T2007] mlx5_core 0000:0b:00.1 enp11s0f1np1: renamed from eth1
[  232.690895][ T2013] mlx5_core 0000:0b:00.0 enp11s0f0np0: renamed from eth0