--- net/wireless/util.c

+++ net/wireless/util.c

@@ -682,3 +682,36 @@ int cfg80211_change_iface(struct cfg8021

return err;

}

+

+u16 cfg80211_calculate_bitrate(struct rate_info *rate)

+{

+ int modulation, streams, bitrate;

+

+ if (!(rate->flags & RATE_INFO_FLAGS_MCS))

+ return rate->legacy;

+

+ /* the formula below does only work for MCS values smaller than 32 */

+ if (rate->mcs >= 32)

+ return 0;

+

+ modulation = rate->mcs & 7;

+ streams = (rate->mcs >> 3) + 1;

+

+ bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?

+ 13500000 : 6500000;

+

+ if (modulation < 4)

+ bitrate *= (modulation + 1);

+ else if (modulation == 4)

+ bitrate *= (modulation + 2);

+ else

+ bitrate *= (modulation + 3);

+

+ bitrate *= streams;

+

+ if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)

+ bitrate = (bitrate / 9) * 10;

+

+ /* do NOT round down here */

+ return (bitrate + 50000) / 100000;

+}