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| author | Johannes Berg <johannes.berg@intel.com> | 2014-05-19 11:24:19 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2014-05-19 14:30:37 +0200 |
| commit | 00591cea31e2e07464c5591871bd6d0cf6a89c42 (patch) | |
| tree | 0608cb8b94597b9911c35c9d508e6a1f5f295bfb /net/mac80211/rc80211_minstrel_ht.c | |
| parent | 1af586c9116cdf6863823a830593c48cd9bcecde (diff) | |
| download | lwn-00591cea31e2e07464c5591871bd6d0cf6a89c42.tar.gz lwn-00591cea31e2e07464c5591871bd6d0cf6a89c42.zip | |
mac80211: minstrel-ht: small clarifications
Antonio and I were looking over this code and some things
didn't immediately make sense, so we came up with two small
clarifications.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index bccaf854a309..4e916ad51a20 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -22,7 +22,7 @@ #define MCS_NBITS (AVG_PKT_SIZE << 3) /* Number of symbols for a packet with (bps) bits per symbol */ -#define MCS_NSYMS(bps) ((MCS_NBITS + (bps) - 1) / (bps)) +#define MCS_NSYMS(bps) DIV_ROUND_UP(MCS_NBITS, (bps)) /* Transmission time (nanoseconds) for a packet containing (syms) symbols */ #define MCS_SYMBOL_TIME(sgi, syms) \ @@ -226,8 +226,9 @@ minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int group, int rate) nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len); nsecs += minstrel_mcs_groups[group].duration[rate]; - tp = 1000000 * ((prob * 1000) / nsecs); + /* prob is scaled - see MINSTREL_FRAC above */ + tp = 1000000 * ((prob * 1000) / nsecs); mr->cur_tp = MINSTREL_TRUNC(tp); } |