ath9k: fix issues with ad-hoc beacon slot selection

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26913 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/570-ath9k_fix_adhoc_beacons.patch b/package/mac80211/patches/570-ath9k_fix_adhoc_beacons.patch
new file mode 100644 (file)
index 0000000..d3eb764
--- /dev/null
+++ b/package/mac80211/patches/570-ath9k_fix_adhoc_beacons.patch
@@ -0,0 +1,50 @@
+--- a/drivers/net/wireless/ath/ath9k/beacon.c
++++ b/drivers/net/wireless/ath/ath9k/beacon.c
+@@ -351,9 +351,7 @@ void ath_beacon_tasklet(unsigned long da
+       struct ath_buf *bf = NULL;
+       struct ieee80211_vif *vif;
+       int slot;
+-      u32 bfaddr, bc = 0, tsftu;
+-      u64 tsf;
+-      u16 intval;
++      u32 bfaddr, bc = 0;
+ 
+       /*
+        * Check if the previous beacon has gone out.  If
+@@ -388,17 +386,27 @@ void ath_beacon_tasklet(unsigned long da
+        * on the tsf to safeguard against missing an swba.
+        */
+ 
+-      intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
+ 
+-      tsf = ath9k_hw_gettsf64(ah);
+-      tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
+-      tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
+-      slot = (tsftu % (intval * ATH_BCBUF)) / intval;
+-      vif = sc->beacon.bslot[slot];
++      if (ah->opmode == NL80211_IFTYPE_AP) {
++              u16 intval;
++              u32 tsftu;
++              u64 tsf;
++
++              intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
++              tsf = ath9k_hw_gettsf64(ah);
++              tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
++              tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
++              slot = (tsftu % (intval * ATH_BCBUF)) / intval;
++              vif = sc->beacon.bslot[slot];
++
++              ath_dbg(common, ATH_DBG_BEACON,
++                      "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
++                      slot, tsf, tsftu / ATH_BCBUF, intval, vif);
++      } else {
++              slot = 0;
++              vif = sc->beacon.bslot[slot];
++      }
+ 
+-      ath_dbg(common, ATH_DBG_BEACON,
+-              "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
+-              slot, tsf, tsftu / ATH_BCBUF, intval, vif);
+ 
+       bfaddr = 0;
+       if (vif) {