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ath9k_common: remove ath9k_compute_qual() 

This is now deprecated and unused within mac80211, so time
to remove it as otherwise we'd be doing some unecessary
computations for nothing.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2009-11-05 08:53:10 -08:00 committed by John W. Linville
parent db86f07ec6
commit 165864d087
1 changed files with 0 additions and 42 deletions
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42
drivers/net/wireless/ath/ath9k/common.c
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@ -142,47 +142,6 @@ static u8 ath9k_process_rate(struct ath_common *common,
return 0; return 0;
} }
/*
* Theory for reporting quality:
*
* At a hardware RSSI of 45 you will be able to use MCS 7 reliably.
* At a hardware RSSI of 45 you will be able to use MCS 15 reliably.
* At a hardware RSSI of 35 you should be able use 54 Mbps reliably.
*
* MCS 7 is the highets MCS index usable by a 1-stream device.
* MCS 15 is the highest MCS index usable by a 2-stream device.
*
* All ath9k devices are either 1-stream or 2-stream.
*
* How many bars you see is derived from the qual reporting.
*
* A more elaborate scheme can be used here but it requires tables
* of SNR/throughput for each possible mode used. For the MCS table
* you can refer to the wireless wiki:
*
* http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
*
*/
static int ath9k_compute_qual(struct ieee80211_hw *hw,
struct ath_rx_status *rx_stats)
{
int qual;
if (conf_is_ht(&hw->conf))
qual = rx_stats->rs_rssi * 100 / 45;
else
qual = rx_stats->rs_rssi * 100 / 35;
/*
* rssi can be more than 45 though, anything above that
* should be considered at 100%
*/
if (qual > 100)
qual = 100;
return qual;
}
static void ath9k_process_rssi(struct ath_common *common, static void ath9k_process_rssi(struct ath_common *common,
struct ieee80211_hw *hw, struct ieee80211_hw *hw,
struct sk_buff *skb, struct sk_buff *skb,
@ -256,7 +215,6 @@ int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
rx_status->noise = common->ani.noise_floor; rx_status->noise = common->ani.noise_floor;
rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi; rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi;
rx_status->antenna = rx_stats->rs_antenna; rx_status->antenna = rx_stats->rs_antenna;
rx_status->qual = ath9k_compute_qual(hw, rx_stats);
rx_status->flag |= RX_FLAG_TSFT; rx_status->flag |= RX_FLAG_TSFT;
return 0; return 0;