1 files changed, 11 insertions, 45 deletions

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index a18cea69904..87aebf17573 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -227,7 +227,6 @@ static int ath_tx_prepare(struct ath_softc *sc,
         }
 
         txctl->if_id = 0;
-        txctl->nextfraglen = 0;
         txctl->frmlen = skb->len + FCS_LEN - (hdrlen & 3);
         txctl->txpower = MAX_RATE_POWER; /* FIXME */
 
@@ -344,51 +343,18 @@ static int ath_tx_prepare(struct ath_softc *sc,
         }
         rix = rcs[0].rix;
 
-        /*
-         * Calculate duration.  This logically belongs in the 802.11
-         * layer but it lacks sufficient information to calculate it.
-         */
-        if ((txctl->flags & ATH9K_TXDESC_NOACK) == 0 && !ieee80211_is_ctl(fc)) {
-                u16 dur;
+        if (ieee80211_has_morefrags(fc) ||
+            (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
                 /*
-                 * XXX not right with fragmentation.
-                 */
-                if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
-                        dur = rt->info[rix].spAckDuration;
-                else
-                        dur = rt->info[rix].lpAckDuration;
-
-                if (le16_to_cpu(hdr->frame_control) &
-                                IEEE80211_FCTL_MOREFRAGS) {
-                        dur += dur;  /* Add additional 'SIFS + ACK' */
-
-                        /*
-                        ** Compute size of next fragment in order to compute
-                        ** durations needed to update NAV.
-                        ** The last fragment uses the ACK duration only.
-                        ** Add time for next fragment.
-                        */
-                        dur += ath9k_hw_computetxtime(sc->sc_ah, rt,
-                                      txctl->nextfraglen,
-                                      rix,
-                                      (sc->sc_flags & SC_OP_PREAMBLE_SHORT));
-                }
-
-                if (ieee80211_has_morefrags(fc) ||
-                     (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
-                        /*
-                        **  Force hardware to use computed duration for next
-                        **  fragment by disabling multi-rate retry, which
-                        **  updates duration based on the multi-rate
-                        **  duration table.
-                        */
-                        rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
-                        rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
-                        /* reset tries but keep rate index */
-                        rcs[0].tries = ATH_TXMAXTRY;
-                }
-
-                hdr->duration_id = cpu_to_le16(dur);
+                **  Force hardware to use computed duration for next
+                **  fragment by disabling multi-rate retry, which
+                **  updates duration based on the multi-rate
+                **  duration table.
+                */
+                rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
+                rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
+                /* reset tries but keep rate index */
+                rcs[0].tries = ATH_TXMAXTRY;
         }
 
         /*