Re: ath5k: no further txbuf available, dropping packet

[Bob Copeland <me@bobcopeland.com>]

On Fri, Oct 23, 2009 at 04:08:16PM +0200, Michael Buesch wrote:
> ath5k breaks in AP mode after some operation time and keeps throwing
> this message:
> 
> [2096249.446071] ath5k phy0: no further txbuf available, dropping packet
> 
> Driver is yesterday's compat-wireless on 2.6.31.1

Ok looked a bit more at this.  I don't see a leak, but I think the
txbufs aren't getting reaped.  Otherwise, we should reenable the queues
when we get back 40 TX completion interrupts.

I'm a bit short on time to track it down, but one thing to try is
commenting out the following from ath5k_beacon_send (will break buffering
but you can test non-ps clients):

        skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
        while (skb) {
                ath5k_tx_queue(sc->hw, skb, sc->cabq);
                skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
        }

-- 
Bob Copeland %% www.bobcopeland.com