Hi,
Let me explain the patch more thoroughly. We are testing MCC and we've
found some issues with the queues handlers, the main problem is that
when we transmit a multicast/broadcast frame, where hw_queue is 8
(CAB), we check queue status, which is 2(q), and if it is full and we
have to stop it, we end stopping the wrong queue, 8, which is not
full. From this point onwards stations are unable to connect to the
AP.
Let me know if something is not clear.
Regards,
On Fri, Nov 13, 2015 at 11:33 AM, Borja Salazar <borja.sala...@fon.com> wrote:
> When channel context is enabled, we could be
> stopping/awakening an incorrect queue.
>
> Signed-off-by: Borja Salazar <borja.sala...@fon.com>
> ---
> drivers/net/wireless/ath/ath9k/xmit.c | 22 ++++++++++++----------
> 1 file changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/xmit.c
> b/drivers/net/wireless/ath/ath9k/xmit.c
> index 3e3dac3..9b17a59 100644
> --- a/drivers/net/wireless/ath/ath9k/xmit.c
> +++ b/drivers/net/wireless/ath/ath9k/xmit.c
> @@ -147,7 +147,12 @@ static void ath_txq_skb_done(struct ath_softc *sc,
> struct ath_txq *txq,
> {
> struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
> struct ath_frame_info *fi = get_frame_info(skb);
> - int q = fi->txq;
> + int q;
> +
> + if (ath9k_is_chanctx_enabled())
> + q = fi->txq;
> + else
> + q = info->hw_queue;
>
> if (q < 0)
> return;
> @@ -158,10 +163,7 @@ static void ath_txq_skb_done(struct ath_softc *sc,
> struct ath_txq *txq,
>
> if (txq->stopped &&
> txq->pending_frames < sc->tx.txq_max_pending[q]) {
> - if (ath9k_is_chanctx_enabled())
> - ieee80211_wake_queue(sc->hw, info->hw_queue);
> - else
> - ieee80211_wake_queue(sc->hw, q);
> + ieee80211_wake_queue(sc->hw, q);
> txq->stopped = false;
> }
> }
> @@ -2299,17 +2301,17 @@ int ath_tx_start(struct ieee80211_hw *hw, struct
> sk_buff *skb,
> * info are no longer valid (overwritten by the ath_frame_info data.
> */
>
> - q = skb_get_queue_mapping(skb);
> + if (ath9k_is_chanctx_enabled())
> + q = skb_get_queue_mapping(skb);
> + else
> + q = info->hw_queue;
>
> ath_txq_lock(sc, txq);
> if (txq == sc->tx.txq_map[q]) {
> fi->txq = q;
> if (++txq->pending_frames > sc->tx.txq_max_pending[q] &&
> !txq->stopped) {
> - if (ath9k_is_chanctx_enabled())
> - ieee80211_stop_queue(sc->hw, info->hw_queue);
> - else
> - ieee80211_stop_queue(sc->hw, q);
> + ieee80211_stop_queue(sc->hw, q);
> txq->stopped = true;
> }
> }
> --
> 2.3.6
>
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