[ath9k-devel] WARN ON at ath_tx_start_dma

[Ben Greear <greearb@candelatech.com>]

On 10/31/2013 02:18 AM, syed moulana wrote:
> Hi
> I am getting WARN_ON at the following location in function ath_tx_start_dma.
> static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
> struct ath_tx_control *txctl)
> {
> struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
> struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
> struct ath_atx_tid *tid = NULL;
> struct ath_buf *bf;
> u8 tidno;
> if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) && txctl->an &&
> ieee80211_is_data_qos(hdr->frame_control)) {
> tidno = ieee80211_get_qos_ctl(hdr)[0] &
> IEEE80211_QOS_CTL_TID_MASK;
> tid = ATH_AN_2_TID(txctl->an, tidno);
> WARN_ON(tid->ac->txq != txctl->txq);
> }
> Please help me understand this situation. On what data conditions I should be getting this warning.
> Thanks
> Syed

Please post full warn-on splat.

And, what traffic are you sending?  I think this can happen with pktgen traffic
in upstream kernel, for instance.

Thanks,
Ben

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-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com