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authorBruno Randolf <bruno@thinktube.com>2008-01-19 12:18:41 +0300
committerDavid S. Miller <davem@davemloft.net>2008-01-29 02:10:53 +0300
commit6d91e1d80822da1c3e790bfbe8df432360fd7f68 (patch)
treecabcf6c28d7e25a45d68419d65a2e748973a62f7 /drivers
parent036cd1ec038f7e3a36740beaf2aa4a0d2e8ed2c1 (diff)
downloadlinux-6d91e1d80822da1c3e790bfbe8df432360fd7f68.tar.xz
ath5k: configure backoff for IBSS beacon queue
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 <bruno@thinktube.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/ath5k/base.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index eb98284cba92..b2a6ef559b69 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 "