diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2011-05-16 23:22:00 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-05-19 13:53:54 -0400 |
| commit | c6820f1e6c8273ca4b8f94c2354193d19e1a5c47 (patch) | |
| tree | 7f7dbc8c88d7cb31ec280d2c1fc486249ea97aec | |
| parent | ed9d01026f156db2d638cbb045231c7a8fde877d (diff) | |
| download | linux-c6820f1e6c8273ca4b8f94c2354193d19e1a5c47.tar.bz2 | |
ath9k: fix ad-hoc mode beacon selection
In ad-hoc mode, beacon timers are configured differently compared to AP
mode, and (depending on the scenario) can vary enough to make the beacon
tasklet not detect slot 0 based on the TSF.
Since staggered beacons are not (and cannot be) used in ad-hoc mode, it
makes more sense to just hardcode slot 0 here, avoiding unnecessary
TSF reads and calculations.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Reported-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/beacon.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c index 637dbc5f7b67..c7f46797c75c 100644 --- 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 data) 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 data) * 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) { |