ath9k: Cleanup bss_info_changed callback

* Remove a code chunk dealing with operating mode changes.
  As noted, all such policy changes are to be done in
  add_interface.

* Remove pointless check for empty BSSID.
  Also, remove mode checks - mac80211 does all the needed checks.

* Handle enabling/disabling beacon transmission properly.

* Handle beacon interval changes for AP mode.
  The original code depended on config_interface() to update
  the HW TSF. Since that callback has been removed, handle
  it properly.

* Remove unneeded code dealing with key/privacy.

* Set the chainmasks to 1x1 for IBSS when the BSSID is set.
  This was happening uncondionally before.

Signed-off-by: Sujith <Sujith.Manoharan@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 3c02b97..3229c39 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2956,90 +2956,62 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath_vif *avp = (void *)vif->drv_priv;
-       u32 rfilt = 0;
-       int error, i;
+       int error;
 
        mutex_lock(&sc->mutex);
 
-       /*
-        * TODO: Need to decide which hw opmode to use for
-        *       multi-interface cases
-        * XXX: This belongs into add_interface!
-        */
-       if (vif->type == NL80211_IFTYPE_AP &&
-           ah->opmode != NL80211_IFTYPE_AP) {
-               ah->opmode = NL80211_IFTYPE_STATION;
-               ath9k_hw_setopmode(ah);
-               memcpy(common->curbssid, common->macaddr, ETH_ALEN);
+       if (changed & BSS_CHANGED_BSSID) {
+               /* Set BSSID */
+               memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
+               memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
                common->curaid = 0;
                ath9k_hw_write_associd(ah);
-               /* Request full reset to get hw opmode changed properly */
-               sc->sc_flags |= SC_OP_FULL_RESET;
-       }
 
-       if ((changed & BSS_CHANGED_BSSID) &&
-           !is_zero_ether_addr(bss_conf->bssid)) {
-               switch (vif->type) {
-               case NL80211_IFTYPE_STATION:
-               case NL80211_IFTYPE_ADHOC:
-               case NL80211_IFTYPE_MESH_POINT:
-                       /* Set BSSID */
-                       memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
-                       memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
-                       common->curaid = 0;
-                       ath9k_hw_write_associd(ah);
+               /* Set aggregation protection mode parameters */
+               sc->config.ath_aggr_prot = 0;
 
-                       /* Set aggregation protection mode parameters */
-                       sc->config.ath_aggr_prot = 0;
+               /* Only legacy IBSS for now */
+               if (vif->type == NL80211_IFTYPE_ADHOC)
+                       ath_update_chainmask(sc, 0);
 
-                       ath_print(common, ATH_DBG_CONFIG,
-                                 "RX filter 0x%x bssid %pM aid 0x%x\n",
-                                 rfilt, common->curbssid, common->curaid);
+               ath_print(common, ATH_DBG_CONFIG,
+                         "BSSID: %pM aid: 0x%x\n",
+                         common->curbssid, common->curaid);
 
-                       /* need to reconfigure the beacon */
-                       sc->sc_flags &= ~SC_OP_BEACONS ;
+               /* need to reconfigure the beacon */
+               sc->sc_flags &= ~SC_OP_BEACONS ;
+       }
 
-                       break;
-               default:
-                       break;
-               }
+       /* Enable transmission of beacons (AP, IBSS, MESH) */
+       if ((changed & BSS_CHANGED_BEACON) ||
+           ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
+               ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+               error = ath_beacon_alloc(aphy, vif);
+               if (!error)
+                       ath_beacon_config(sc, vif);
        }
 
-       if ((vif->type == NL80211_IFTYPE_ADHOC) ||
-           (vif->type == NL80211_IFTYPE_AP) ||
-           (vif->type == NL80211_IFTYPE_MESH_POINT)) {
-               if ((changed & BSS_CHANGED_BEACON) ||
-                   (changed & BSS_CHANGED_BEACON_ENABLED &&
-                    bss_conf->enable_beacon)) {
-                       /*
-                        * Allocate and setup the beacon frame.
-                        *
-                        * Stop any previous beacon DMA.  This may be
-                        * necessary, for example, when an ibss merge
-                        * causes reconfiguration; we may be called
-                        * with beacon transmission active.
-                        */
-                       ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+       /* Disable transmission of beacons */
+       if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
+               ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
 
+       if (changed & BSS_CHANGED_BEACON_INT) {
+               sc->beacon_interval = bss_conf->beacon_int;
+               /*
+                * In case of AP mode, the HW TSF has to be reset
+                * when the beacon interval changes.
+                */
+               if (vif->type == NL80211_IFTYPE_AP) {
+                       sc->sc_flags |= SC_OP_TSF_RESET;
+                       ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
                        error = ath_beacon_alloc(aphy, vif);
                        if (!error)
                                ath_beacon_config(sc, vif);
+               } else {
+                       ath_beacon_config(sc, vif);
                }
        }
 
-       /* Check for WLAN_CAPABILITY_PRIVACY ? */
-       if ((avp->av_opmode != NL80211_IFTYPE_STATION)) {
-               for (i = 0; i < IEEE80211_WEP_NKID; i++)
-                       if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
-                               ath9k_hw_keysetmac(sc->sc_ah,
-                                                  (u16)i,
-                                                  common->curbssid);
-       }
-
-       /* Only legacy IBSS for now */
-       if (vif->type == NL80211_IFTYPE_ADHOC)
-               ath_update_chainmask(sc, 0);
-
        if (changed & BSS_CHANGED_ERP_PREAMBLE) {
                ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
                          bss_conf->use_short_preamble);
@@ -3065,18 +3037,6 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
                ath9k_bss_assoc_info(sc, vif, bss_conf);
        }
 
-       /*
-        * The HW TSF has to be reset when the beacon interval changes.
-        * We set the flag here, and ath_beacon_config_ap() would take this
-        * into account when it gets called through the subsequent
-        * config_interface() call - with IFCC_BEACON in the changed field.
-        */
-
-       if (changed & BSS_CHANGED_BEACON_INT) {
-               sc->sc_flags |= SC_OP_TSF_RESET;
-               sc->beacon_interval = bss_conf->beacon_int;
-       }
-
        mutex_unlock(&sc->mutex);
 }