netdev - Re: [PATCH net] net/sched: act_gate: Unlock ->tcfa_lock in tc_setup_flow

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Message-ID: <20201021075243.GA3789@linux.home>
Date:   Wed, 21 Oct 2020 09:52:43 +0200
From:   Guillaume Nault <gnault@...hat.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>, Po Liu <Po.Liu@....com>
Subject: Re: [PATCH net] net/sched: act_gate: Unlock ->tcfa_lock in
 tc_setup_flow_action()

On Tue, Oct 20, 2020 at 05:37:22PM -0700, Cong Wang wrote:
> On Tue, Oct 20, 2020 at 8:34 AM Guillaume Nault <gnault@...hat.com> wrote:
> >
> > We need to jump to the "err_out_locked" label when
> > tcf_gate_get_entries() fails. Otherwise, tc_setup_flow_action() exits
> > with ->tcfa_lock still held.
> >
> > Fixes: d29bdd69ecdd ("net: schedule: add action gate offloading")
> > Signed-off-by: Guillaume Nault <gnault@...hat.com>
> 
> Looks like the err_out label can be just removed after this patch?

That'd require reworking the error path, as err_out is used there. I
don't feel that doing so would improve readability much.

> If any compiler complains, you have to fix it in v2, otherwise can be in a
> separate patch.
> 
> Other than this,
> 
> Acked-by: Cong Wang <xiyou.wangcong@...il.com>

Thanks.