From 6d91e1d80822da1c3e790bfbe8df432360fd7f68 Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Sat, 19 Jan 2008 18:18:41 +0900 Subject: [PATCH] ath5k: configure backoff for IBSS beacon queue MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit in "11.1.2.2 Beacon generation in an IBSS" the IEEE802.11 standard says, each STA should... "b) Calculate a random delay uniformly distributed in the range between zero and twice aCWmin × aSlotTime,". configure cwmin and cwmax of the beacon queue in IBSS mode according to this. unfortunately beacon backoff does not work reliably yet, so i suspect we have a problem somewhere else, since the same settings (and similar beacon timer configuration) work for madwifi. drivers/net/wireless/ath5k/base.c: Changes-licensed-under: 3-Clause-BSD Signed-off-by: Bruno Randolf Signed-off-by: John W. Linville --- drivers/net/wireless/ath5k/base.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c index eb98284cba9..b2a6ef559b6 100644 --- a/drivers/net/wireless/ath5k/base.c +++ b/drivers/net/wireless/ath5k/base.c @@ -1458,8 +1458,7 @@ ath5k_beaconq_config(struct ath5k_softc *sc) ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi); if (ret) return ret; - if (sc->opmode == IEEE80211_IF_TYPE_AP || - sc->opmode == IEEE80211_IF_TYPE_IBSS) { + if (sc->opmode == IEEE80211_IF_TYPE_AP) { /* * Always burst out beacon and CAB traffic * (aifs = cwmin = cwmax = 0) @@ -1467,8 +1466,19 @@ ath5k_beaconq_config(struct ath5k_softc *sc) qi.tqi_aifs = 0; qi.tqi_cw_min = 0; qi.tqi_cw_max = 0; + } else if (sc->opmode == IEEE80211_IF_TYPE_IBSS) { + /* + * Adhoc mode; backoff between 0 and (2 * cw_min). + */ + qi.tqi_aifs = 0; + qi.tqi_cw_min = 0; + qi.tqi_cw_max = 2 * ah->ah_cw_min; } + ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, + "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n", + qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max); + ret = ath5k_hw_setup_tx_queueprops(ah, sc->bhalq, &qi); if (ret) { ATH5K_ERR(sc, "%s: unable to update parameters for beacon " -- 2.41.1