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authorFelix Fietkau <nbd@openwrt.org>2011-05-17 10:34:12 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-05-19 13:54:05 -0400
commitac56703e0e790509963ee42cddebe706fbd3b74c (patch)
tree83adac6e8a05fab9c9d7a6e62beb6d7104639231 /drivers/net/wireless/ath
parent5b68138e5659cbfd5df2879d17f9ba0b66477fec (diff)
ath9k: fix ad-hoc nexttbtt calculation
rounding up the delta between last-beacon-tsf and tsf to intval is wrong and can lead to misconfigured timers which breaks beacon transmission. Fix this by adding intval and subtracting the offset of the tsf within the current slot. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath')
-rw-r--r--drivers/net/wireless/ath/ath9k/beacon.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 2f659949e6e0..61b501aae5e9 100644
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -654,7 +654,7 @@ static void ath_beacon_config_adhoc(struct ath_softc *sc,
delta = (tsf - sc->beacon.bc_tstamp);
else
delta = (tsf + 1 + (~0U - sc->beacon.bc_tstamp));
- nexttbtt = tsf + roundup(delta, intval);
+ nexttbtt = tsf + intval - (delta % intval);
}
ath_dbg(common, ATH_DBG_BEACON,