diff options
| author | Luis R. Rodriguez <lrodriguez@atheros.com> | 2008-10-03 15:45:27 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-10-06 18:14:56 -0400 |
| commit | 6f255425ac3b10c3352c926e7b53e5ea1c364ca4 (patch) | |
| tree | 529cf0d1d1e9d9fdd8e9d6da67f5d99072872dc4 /drivers/net/wireless/ath9k/recv.c | |
| parent | a477e4e6d48d3ac7c7a75bad40585cb391e5c237 (diff) | |
| download | lwn-6f255425ac3b10c3352c926e7b53e5ea1c364ca4.tar.gz lwn-6f255425ac3b10c3352c926e7b53e5ea1c364ca4.zip | |
ath9k: enable ANI to help with noisy environments
This enables Adaptive Noise Immunity (ANI) on ath9k.
ANI is as algorithm designed to minimize the detrimental
effects of time-varying interferences. This should
help with throughput in noisy environments. To use
ANI we re-enable the MIB interrupt. Since ANI works
on a timer and updates the noise floor we take
advantage of this and also report a non-static noise
floor now to mac80211.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: Jouni Malinen <Jouni.Malinen@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath9k/recv.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/recv.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c index f4be5d11c9d5..4983402af559 100644 --- a/drivers/net/wireless/ath9k/recv.c +++ b/drivers/net/wireless/ath9k/recv.c @@ -999,20 +999,11 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) rx_status.flags |= ATH_RX_SHORT_GI; } - /* sc->sc_noise_floor is only available when the station + /* sc_noise_floor is only available when the station attaches to an AP, so we use a default value if we are not yet attached. */ - - /* XXX we should use either sc->sc_noise_floor or - * ath_hal_getChanNoise(ah, &sc->sc_curchan) - * to calculate the noise floor. - * However, the value returned by ath_hal_getChanNoise - * seems to be incorrect (-31dBm on the last test), - * so we will use a hard-coded value until we - * figure out what is going on. - */ rx_status.abs_rssi = - ds->ds_rxstat.rs_rssi + ATH_DEFAULT_NOISE_FLOOR; + ds->ds_rxstat.rs_rssi + sc->sc_ani.sc_noise_floor; pci_dma_sync_single_for_cpu(sc->pdev, bf->bf_buf_addr, |