netdev - Re: [PATCH net-next 4/5] bnxt_en: Refactor __bnxt_vf_reps

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Message-ID: <CACKFLimkp8HafpK+cP4+ib9gDkqT9=Evvm-mPrRd9gAHyADcPA@mail.gmail.com>
Date:   Mon, 12 Apr 2021 10:51:25 -0700
From:   Michael Chan <michael.chan@...adcom.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     David Miller <davem@...emloft.net>,
        Netdev <netdev@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Andrew Gospodarek <gospo@...adcom.com>,
        Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
Subject: Re: [PATCH net-next 4/5] bnxt_en: Refactor __bnxt_vf_reps_destroy().

On Mon, Apr 12, 2021 at 10:33 AM Leon Romanovsky <leon@...nel.org> wrote:
>
> On Mon, Apr 12, 2021 at 09:31:33AM -0700, Michael Chan wrote:
> > On Mon, Apr 12, 2021 at 12:37 AM Leon Romanovsky <leon@...nel.org> wrote:
> > >
> > > On Sun, Apr 11, 2021 at 08:18:14PM -0400, Michael Chan wrote:
> > > > Add a new helper function __bnxt_free_one_vf_rep() to free one VF rep.
> > > > We also reintialize the VF rep fields to proper initial values so that
> > > > the function can be used without freeing the VF rep data structure.  This
> > > > will be used in subsequent patches to free and recreate VF reps after
> > > > error recovery.
> > > >
> > > > Reviewed-by: Edwin Peer <edwin.peer@...adcom.com>
> > > > Reviewed-by: Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
> > > > Signed-off-by: Michael Chan <michael.chan@...adcom.com>
> > > > ---
> > > >  drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c | 21 ++++++++++++++-----
> > > >  1 file changed, 16 insertions(+), 5 deletions(-)
> > > >
> > > > diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c
> > > > index b5d6cd63bea7..a4ac11f5b0e5 100644
> > > > --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c
> > > > +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c
> > > > @@ -288,6 +288,21 @@ void bnxt_vf_reps_open(struct bnxt *bp)
> > > >               bnxt_vf_rep_open(bp->vf_reps[i]->dev);
> > > >  }
> > > >
> > > > +static void __bnxt_free_one_vf_rep(struct bnxt *bp, struct bnxt_vf_rep *vf_rep)
> > > > +{
> > > > +     if (!vf_rep)
> > > > +             return;
> > >
> > > How can it be NULL if you check that vf_rep != NULL when called to
> > > __bnxt_free_one_vf_rep() ?
> > >
> >
> > For this patch, the if (!vf_rep) check here is redundant.  But it is
> > needed in the next patch (patch 5) that calls this function from
> > bnxt_vf_reps_free() in a different context.  Thanks.
>
> So add it in the patch that needs it.
>

As stated in the changelog, we added more code to make this function
more general and usable from another context.  The check for !vf_rep
is part of that.  In my opinion, I think it is ok to keep it here
given that the intent of this patch is to create a more general
function.  Thanks.

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