netdev - Re: [PATCH net-next v2] bonding: uninitialized variable in bond_miimon

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Date:   Mon, 28 Nov 2022 20:35:20 +0530
From:   Pavan Chebbi <pavan.chebbi@...adcom.com>
To:     Dan Carpenter <error27@...il.com>
Cc:     Jay Vosburgh <j.vosburgh@...il.com>,
        Jonathan Toppins <jtoppins@...hat.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH net-next v2] bonding: uninitialized variable in bond_miimon_inspect()

On Mon, Nov 28, 2022 at 8:10 PM Dan Carpenter <error27@...il.com> wrote:
>
> On Mon, Nov 28, 2022 at 05:36:41PM +0300, Dan Carpenter wrote:
> > On Mon, Nov 28, 2022 at 07:15:39PM +0530, Pavan Chebbi wrote:
> > > On Mon, Nov 28, 2022 at 4:36 PM Dan Carpenter <error27@...il.com> wrote:
> > > >
> > > > The "ignore_updelay" variable needs to be initialized to false.
> > > >
> > > > Fixes: f8a65ab2f3ff ("bonding: fix link recovery in mode 2 when updelay is nonzero")
> > > > Signed-off-by: Dan Carpenter <error27@...il.com>
> > > > ---
> > > > v2: Re-order so the declarations are in reverse Christmas tree order
> > > >
> > > Thanks,
> > > Reviewed-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
> > >
> > > > Don't forget about:
> > > > drivers/net/bonding/bond_main.c:5071 bond_update_slave_arr() warn: missing error code here? 'bond_3ad_get_active_agg_info()' failed. 'ret' = '0'
> > > >
> > >
> > > I think that warning can be ignored, as bond_update_slave_arr() does
> > > consider the return value of bond_3ad_get_active_agg_info() but
> > > chooses to not bubble it up. Though the author of the function is the
> > > best person to answer it, at this point, it looks OK to me. Maybe a
> > > separate patch to address it would help to get the attention of the
> > > author.
> >
> > Heh...  That's slightly vague.
> >
> > You're wrong to say that none of the callers care about the error code.
> > It is checked in bond_slave_arr_handler().
>
> If you don't know that's fine also...  All the maintainers are CC'd.  If
> they really care they can take a look otherwise there are so many other
> obvious bugs to care about and this is very minor.
>

No, I did not say nobody cares about the error code. I just said that
bond_update_slave_arr() does care about
bond_3ad_get_active_agg_info()'s return value, takes appropriate
action and returns success to its caller. I think this is the scope
and context of the warning message.
To me this looks OK, but again, the maintainer/author is the best judge.

> regards,
> dan carpenter
>

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