linux-kernel - Re: [PATCH for-next] RDMA: return -EOPNOSUPP for ODP unsupported device

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Date:   Sat, 1 Oct 2022 18:50:47 +0800
From:   Zhu Yanjun <zyjzyj2000@...il.com>
To:     Li Zhijian <lizhijian@...itsu.com>
Cc:     Bob Pearson <rpearsonhpe@...il.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH for-next] RDMA: return -EOPNOSUPP for ODP unsupported device

On Sat, Oct 1, 2022 at 10:00 AM Li Zhijian <lizhijian@...itsu.com> wrote:
>
> ib_reg_mr(3) which is used to register a MR with specific access flags
> for specific HCA will set errno when something go wrong.
> So, here we should return the specific -EOPNOTSUPP when the being
> requested ODP access flag is unspported by the HCA(such as RXE).
>
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>

Reviewed-by: Zhu Yanjun <zyjzyj2000@...il.com>

Thanks.
Zhu Yanjun
> ---
>  include/rdma/ib_verbs.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index 975d6e9efbcb..a1f4d53a4bb6 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -4334,7 +4334,7 @@ static inline int ib_check_mr_access(struct ib_device *ib_dev,
>
>         if (flags & IB_ACCESS_ON_DEMAND &&
>             !(ib_dev->attrs.kernel_cap_flags & IBK_ON_DEMAND_PAGING))
> -               return -EINVAL;
> +               return -EOPNOTSUPP;
>         return 0;
>  }
>
> --
> 2.31.1
>