From 63ded3f059f5c906fdef4b7f0663fb39c4d96c8e Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 19 Dec 2013 18:01:50 +0100 Subject: [PATCH] ath9k: fix TSF offset precision issue Dividing the beacon interval by ATH_BCBUF (8) truncates the result for the default beacon interval of 100. Fix the calculation by moving the division after conversion from TU to microseconds. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/beacon.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c index accfb3b60daa..112aff720e13 100644 --- a/drivers/net/wireless/ath/ath9k/beacon.c +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -279,13 +279,14 @@ static void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif) struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; struct ath_vif *avp = (void *)vif->drv_priv; - u64 tsfadjust; + u32 tsfadjust; if (avp->av_bslot == 0) return; - tsfadjust = cur_conf->beacon_interval * avp->av_bslot / ATH_BCBUF; - avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust)); + tsfadjust = cur_conf->beacon_interval * avp->av_bslot; + tsfadjust = TU_TO_USEC(tsfadjust) / ATH_BCBUF; + avp->tsf_adjust = cpu_to_le64(tsfadjust); ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n", (unsigned long long)tsfadjust, avp->av_bslot); -- 2.20.1