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mac80211: minstrel-ht: small clarifications

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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>
This commit is contained in:
Johannes Berg
2014-05-19 11:24:19 +02:00
parent 1af586c911
commit 00591cea31
1 changed files with 3 additions and 2 deletions
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5
net/mac80211/rc80211_minstrel_ht.c
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@@ -22,7 +22,7 @@
#define MCS_NBITS (AVG_PKT_SIZE << 3) #define MCS_NBITS (AVG_PKT_SIZE << 3)
/* Number of symbols for a packet with (bps) bits per symbol */ /* 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 */ /* Transmission time (nanoseconds) for a packet containing (syms) symbols */
#define MCS_SYMBOL_TIME(sgi, syms) \ #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 = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
nsecs += minstrel_mcs_groups[group].duration[rate]; 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); mr->cur_tp = MINSTREL_TRUNC(tp);
} }