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Commit 00591cea authored by Johannes Berg's avatar Johannes Berg
Browse files

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: default avatarJohannes Berg <johannes.berg@intel.com>
parent 1af586c9

net/mac80211/rc80211_minstrel_ht.c

+3 −2
Original line number Diff line number Diff line
@@ -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);

}