From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 16 May 2011 21:50:30 +0000 (+0000)
Subject: ath9k: fix issues with ad-hoc beacon slot selection
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7b84bc2f39655f2bc1a10a0861843c4bba740f00;p=openwrt%2Fstaging%2Flinusw.git

ath9k: fix issues with ad-hoc beacon slot selection

SVN-Revision: 26913
---

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
index 0000000000..d3eb764090
--- /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) {