netdev - Re: [PATCH wpan-next 10/11] net: mac802154: Introduce a tx queue flushing mechanism

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Date:   Tue, 10 May 2022 10:57:03 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <aahringo@...hat.com>
Cc:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH wpan-next 10/11] net: mac802154: Introduce a tx queue
 flushing mechanism

Hi Alex,

> > --- a/net/mac802154/tx.c
> > +++ b/net/mac802154/tx.c
> > @@ -45,7 +45,8 @@ void ieee802154_xmit_sync_worker(struct work_struct *work)
> >         /* Restart the netif queue on each sub_if_data object. */
> >         ieee802154_wake_queue(local);
> >         kfree_skb(skb);
> > -       atomic_dec(&local->phy->ongoing_txs);
> > +       if (!atomic_dec_and_test(&local->phy->ongoing_txs))
> > +               wake_up(&local->phy->sync_txq);
> >         netdev_dbg(dev, "transmission failed\n");
> >  }  
> 
> There is a missing handling of dec() wake_up() in ieee802154_tx()
> "err_tx" label.

Good catch. Fixed.

Thanks,
Miquèl