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mac80211: select and adjust bitrates according to channel mode

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The various components accessing the bitrates table must use consider
the used channel bandwidth to select only available rates or calculate
the bitrate correctly.

There are some rates in reduced bandwidth modes which can't be
represented as multiples of 500kbps, like 2.25 MBit/s in 5 MHz mode. The
standard suggests to round up to the next multiple of 500kbps, just do
that in mac80211 as well.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
[make rate unsigned in ieee80211_add_tx_radiotap_header(), squash fix]
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
This commit is contained in:
Simon Wunderlich 2013-07-08 16:55:53 +02:00 • committed by Johannes Berg
parent a5e70697d0
commit 2103dec147
12 changed files with 354 additions and 161 deletions
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7
net/mac80211/rx.c
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@ -236,8 +236,13 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
*/
*pos = 0;
} else {
int shift = 0;
rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
*pos = rate->bitrate / 5;
if (status->flag & RX_FLAG_10MHZ)
shift = 1;
else if (status->flag & RX_FLAG_5MHZ)
shift = 2;
*pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift));
}
pos++;