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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>
This commit is contained in:
Felix Fietkau 2011-05-17 10:34:12 +02:00 committed by John W. Linville
parent 5b68138e56
commit ac56703e0e
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath9k/beacon.c
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@ -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,