netdev - Re: [PATCH net-next 1/2] net: sched: fix logic error in qdisc_run

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Message-ID: <CANn89iKM-hs5O3v5B+Rzx+gyt2g6GeQGAFmn7+sz34KtDUbHNw@mail.gmail.com>
Date:   Thu, 21 Oct 2021 09:24:39 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        "Ahmed S . Darwish" <a.darwish@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH net-next 1/2] net: sched: fix logic error in qdisc_run_begin()

On Thu, Oct 21, 2021 at 9:23 AM Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> From: Eric Dumazet <edumazet@...gle.com>
>
> For non TCQ_F_NOLOCK qdisc, qdisc_run_begin() tries to set
> __QDISC_STATE_RUNNING and should return true if the bit was not set.
>
> test_and_set_bit() returns old bit value, therefore we need to invert.
>
> Fixes: 29cbcd858283 ("net: sched: Remove Qdisc::running sequence counter")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Ahmed S. Darwish <a.darwish@...utronix.de>
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> ---

Please disregard, I have accidentally resent this already merged patch.