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>
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index f4be5d1..4983402 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -999,20 +999,11 @@
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,