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ath5k: correct ath5k signal quality 

This adjusts ath5k's signal quality reporting taking into
consideration received beacons at an RSSI of 35 should indicate
you can use of 54 Mbps on a single stream card (all ath5k cards)
reliably.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2008-10-13 14:08:10 -07:00 committed by John W. Linville
parent c49d154a80
commit 6e0e0bf80c
1 changed files with 11 additions and 1 deletions
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12
drivers/net/wireless/ath5k/base.c
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@ -1778,7 +1778,17 @@ ath5k_tasklet_rx(unsigned long data)
rxs.noise = sc->ah->ah_noise_floor;
rxs.signal = rxs.noise + rs.rs_rssi;
rxs.qual = rs.rs_rssi * 100 / 64;
/* An rssi of 35 indicates you should be able use
* 54 Mbps reliably. A more elaborate scheme can be used
* here but it requires a map of SNR/throughput for each
* possible mode used */
rxs.qual = rs.rs_rssi * 100 / 35;
/* rssi can be more than 35 though, anything above that
* should be considered at 100% */
if (rxs.qual > 100)
rxs.qual = 100;
rxs.antenna = rs.rs_antenna;
rxs.rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);