ath9k: Do not update frame's duration field
When AR_DurUpdateEna is set, the frame's duration field is updated by the MAC based on the current rate. Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -516,7 +516,6 @@ struct ath_tx_control {
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u32 keyix;
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int min_rate;
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int mcast_rate;
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u16 nextfraglen;
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struct ath_softc *dev;
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dma_addr_t dmacontext;
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};
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@ -227,7 +227,6 @@ static int ath_tx_prepare(struct ath_softc *sc,
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}
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txctl->if_id = 0;
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txctl->nextfraglen = 0;
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txctl->frmlen = skb->len + FCS_LEN - (hdrlen & 3);
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txctl->txpower = MAX_RATE_POWER; /* FIXME */
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@ -344,51 +343,18 @@ static int ath_tx_prepare(struct ath_softc *sc,
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}
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rix = rcs[0].rix;
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/*
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* Calculate duration. This logically belongs in the 802.11
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* layer but it lacks sufficient information to calculate it.
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*/
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if ((txctl->flags & ATH9K_TXDESC_NOACK) == 0 && !ieee80211_is_ctl(fc)) {
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u16 dur;
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if (ieee80211_has_morefrags(fc) ||
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(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
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/*
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* XXX not right with fragmentation.
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*/
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if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
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dur = rt->info[rix].spAckDuration;
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else
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dur = rt->info[rix].lpAckDuration;
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if (le16_to_cpu(hdr->frame_control) &
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IEEE80211_FCTL_MOREFRAGS) {
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dur += dur; /* Add additional 'SIFS + ACK' */
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/*
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** Compute size of next fragment in order to compute
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** durations needed to update NAV.
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** The last fragment uses the ACK duration only.
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** Add time for next fragment.
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*/
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dur += ath9k_hw_computetxtime(sc->sc_ah, rt,
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txctl->nextfraglen,
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rix,
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(sc->sc_flags & SC_OP_PREAMBLE_SHORT));
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}
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if (ieee80211_has_morefrags(fc) ||
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(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
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/*
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** Force hardware to use computed duration for next
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** fragment by disabling multi-rate retry, which
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** updates duration based on the multi-rate
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** duration table.
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*/
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rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
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rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
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/* reset tries but keep rate index */
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rcs[0].tries = ATH_TXMAXTRY;
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}
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hdr->duration_id = cpu_to_le16(dur);
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** Force hardware to use computed duration for next
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** fragment by disabling multi-rate retry, which
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** updates duration based on the multi-rate
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** duration table.
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*/
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rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
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rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
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/* reset tries but keep rate index */
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rcs[0].tries = ATH_TXMAXTRY;
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}
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/*
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