ath9k: Add change_interface callback

Add support to change interface type
without bringing down the interface.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ef87637..ca35aaa 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1428,13 +1428,78 @@ out:
        return ret;
 }
 
+static void ath9k_reclaim_beacon(struct ath_softc *sc,
+                                struct ieee80211_vif *vif)
+{
+       struct ath_vif *avp = (void *)vif->drv_priv;
+
+       /* Disable SWBA interrupt */
+       sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
+       ath9k_ps_wakeup(sc);
+       ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
+       ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+       tasklet_kill(&sc->bcon_tasklet);
+       ath9k_ps_restore(sc);
+
+       ath_beacon_return(sc, avp);
+       sc->sc_flags &= ~SC_OP_BEACONS;
+
+       if (sc->nbcnvifs > 0) {
+               /* Re-enable beaconing */
+               sc->sc_ah->imask |= ATH9K_INT_SWBA;
+               ath9k_ps_wakeup(sc);
+               ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
+               ath9k_ps_restore(sc);
+       }
+}
+
+static int ath9k_change_interface(struct ieee80211_hw *hw,
+                                 struct ieee80211_vif *vif,
+                                 enum nl80211_iftype new_type,
+                                 bool p2p)
+{
+       struct ath_wiphy *aphy = hw->priv;
+       struct ath_softc *sc = aphy->sc;
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+       ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
+       mutex_lock(&sc->mutex);
+
+       switch (new_type) {
+       case NL80211_IFTYPE_AP:
+       case NL80211_IFTYPE_ADHOC:
+               if (sc->nbcnvifs >= ATH_BCBUF) {
+                       ath_err(common, "No beacon slot available\n");
+                       return -ENOBUFS;
+               }
+               break;
+       case NL80211_IFTYPE_STATION:
+               /* Stop ANI */
+               sc->sc_flags &= ~SC_OP_ANI_RUN;
+               del_timer_sync(&common->ani.timer);
+               if ((vif->type == NL80211_IFTYPE_AP) ||
+                   (vif->type == NL80211_IFTYPE_ADHOC))
+                       ath9k_reclaim_beacon(sc, vif);
+               break;
+       default:
+               ath_err(common, "Interface type %d not yet supported\n",
+                               vif->type);
+               mutex_unlock(&sc->mutex);
+               return -ENOTSUPP;
+       }
+       vif->type = new_type;
+       vif->p2p = p2p;
+
+       mutex_unlock(&sc->mutex);
+       return 0;
+}
+
 static void ath9k_remove_interface(struct ieee80211_hw *hw,
                                   struct ieee80211_vif *vif)
 {
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-       struct ath_vif *avp = (void *)vif->drv_priv;
 
        ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
 
@@ -1447,26 +1512,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
        /* Reclaim beacon resources */
        if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
            (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
-           (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
-               /* Disable SWBA interrupt */
-               sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
-               ath9k_ps_wakeup(sc);
-               ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
-               ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
-               ath9k_ps_restore(sc);
-               tasklet_kill(&sc->bcon_tasklet);
-       }
-
-       ath_beacon_return(sc, avp);
-       sc->sc_flags &= ~SC_OP_BEACONS;
-
-       if (sc->nbcnvifs) {
-               /* Re-enable SWBA interrupt */
-               sc->sc_ah->imask |= ATH9K_INT_SWBA;
-               ath9k_ps_wakeup(sc);
-               ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
-               ath9k_ps_restore(sc);
-       }
+           (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT))
+               ath9k_reclaim_beacon(sc, vif);
 
        sc->nvifs--;
 
@@ -2111,6 +2158,7 @@ struct ieee80211_ops ath9k_ops = {
        .start              = ath9k_start,
        .stop               = ath9k_stop,
        .add_interface      = ath9k_add_interface,
+       .change_interface   = ath9k_change_interface,
        .remove_interface   = ath9k_remove_interface,
        .config             = ath9k_config,
        .configure_filter   = ath9k_configure_filter,