linux-kernel - Re: [PATCH net-next] bnxt_en: Allow to set switchdev mode without existing VFs

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Message-ID: <258624e7ffa7bfc3960e727c451cdabe4e7f3efe.camel@redhat.com>
Date:   Tue, 11 Apr 2023 12:22:00 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Ivan Vecera <ivecera@...hat.com>, netdev@...r.kernel.org
Cc:     mschmidt@...hat.com, Michael Chan <michael.chan@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] bnxt_en: Allow to set switchdev mode without
 existing VFs

On Thu, 2023-04-06 at 15:04 +0200, Ivan Vecera wrote:
> Remove an inability of bnxt_en driver to set eswitch to switchdev
> mode without existing VFs by:
> 
> 1. Allow to set switchdev mode in bnxt_dl_eswitch_mode_set() so
>    representors are created only when num_vfs > 0 otherwise just
>    set bp->eswitch_mode
> 2. Do not automatically change bp->eswitch_mode during
>    bnxt_vf_reps_create() and bnxt_vf_reps_destroy() calls so
>    the eswitch mode is managed only by an user by devlink.
>    Just set temporarily bp->eswitch_mode to legacy to avoid
>    re-opening of representors during destroy.
> 3. Create representors in bnxt_sriov_enable() if current eswitch
>    mode is switchdev one
> 
> Tested by this sequence:
> 1. Set PF interface up
> 2. Set PF's eswitch mode to switchdev
> 3. Created N VFs
> 4. Checked that N representors were created
> 5. Set eswitch mode to legacy
> 6. Checked that representors were deleted
> 7. Set eswitch mode back to switchdev
> 8. Checked that representros were re-created

Could you please update the commit message and re-post?

Thanks!

Paolo