[PATCH] ath9k: Store noise immunity values across scanning
From: Rajkumar Manoharan <hidden>
Date: 2011-09-19 14:45:11
Subsystem:
atheros ath generic utilities, qualcomm atheros ath9k wireless driver, the rest · Maintainers:
Jeff Johnson, Toke Høiland-Jørgensen, Linus Torvalds
CCK/OFDM noise immunilty values are always reset to defaults during bgscan. This could affect the link quality and performance when the STA is associated in a noisy channel. So do not override the learned values across the scanning. Signed-off-by: Rajkumar Manoharan <redacted> --- drivers/net/wireless/ath/ath9k/ani.c | 10 ++++++++-- drivers/net/wireless/ath/ath9k/ani.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
index d969a11..01240d6 100644
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c@@ -273,7 +273,8 @@ static void ath9k_hw_set_ofdm_nil(struct ath_hw *ah, u8 immunityLevel) immunityLevel, aniState->noiseFloor, aniState->rssiThrLow, aniState->rssiThrHigh); - aniState->ofdmNoiseImmunityLevel = immunityLevel; + if (aniState->update_ani) + aniState->ofdmNoiseImmunityLevel = immunityLevel; entry_ofdm = &ofdm_level_table[aniState->ofdmNoiseImmunityLevel]; entry_cck = &cck_level_table[aniState->cckNoiseImmunityLevel];
@@ -346,7 +347,8 @@ static void ath9k_hw_set_cck_nil(struct ath_hw *ah, u_int8_t immunityLevel) immunityLevel > ATH9K_ANI_CCK_MAX_LEVEL_LOW_RSSI) immunityLevel = ATH9K_ANI_CCK_MAX_LEVEL_LOW_RSSI; - aniState->cckNoiseImmunityLevel = immunityLevel; + if (aniState->update_ani) + aniState->cckNoiseImmunityLevel = immunityLevel; entry_ofdm = &ofdm_level_table[aniState->ofdmNoiseImmunityLevel]; entry_cck = &cck_level_table[aniState->cckNoiseImmunityLevel];
@@ -593,6 +595,7 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning) aniState->ofdmNoiseImmunityLevel, aniState->cckNoiseImmunityLevel); + aniState->update_ani = false; ath9k_hw_set_ofdm_nil(ah, ATH9K_ANI_OFDM_DEF_LEVEL); ath9k_hw_set_cck_nil(ah, ATH9K_ANI_CCK_DEF_LEVEL); }
@@ -609,6 +612,7 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning) aniState->ofdmNoiseImmunityLevel, aniState->cckNoiseImmunityLevel); + aniState->update_ani = true; ath9k_hw_set_ofdm_nil(ah, aniState->ofdmNoiseImmunityLevel); ath9k_hw_set_cck_nil(ah,
@@ -892,6 +896,8 @@ void ath9k_hw_ani_init(struct ath_hw *ah) ani->ofdmWeakSigDetectOff = !ATH9K_ANI_USE_OFDM_WEAK_SIG; ani->cckNoiseImmunityLevel = ATH9K_ANI_CCK_DEF_LEVEL; + ani->ofdmNoiseImmunityLevel = ATH9K_ANI_OFDM_DEF_LEVEL; + ani->update_ani = false; } /*
diff --git a/drivers/net/wireless/ath/ath9k/ani.h b/drivers/net/wireless/ath/ath9k/ani.h
index a547005..83029d6 100644
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h@@ -122,6 +122,7 @@ struct ar5416AniState { u8 firstepLevel; u8 ofdmWeakSigDetectOff; u8 cckWeakSigThreshold; + bool update_ani; u32 listenTime; int32_t rssiThrLow; int32_t rssiThrHigh;
--
1.7.6.1