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Date:   Sat, 20 Mar 2021 11:30:29 +0200
From:   Leon Romanovsky <leon@kernel.org>
To:     Jinpu Wang <jinpu.wang@cloud.ionos.com>
Cc:     linux-rdma@vger.kernel.org, Jason Gunthorpe <jgg@ziepe.ca>,
        Doug Ledford <dledford@redhat.com>
Subject: Re: IPoIB child interfaces not working with mlx5
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On Fri, Mar 19, 2021 at 08:44:29AM +0100, Jinpu Wang wrote:
> Hi Jason and Leon,
> 
> We recently switch to use upstream OFED from MLNX-OFED, and we notice
> IPoIB stop working with upstream kernel 5.4.102 with mellanox CX-5
> HCA, it's working fine on CX-2/CX-3. I tested also on 5.11 kernel it
> behaves the same.

Are you using "enhanced IPoIB" for CX-5 devices? MLX5_CORE_IPOIB?

Thanks