AR9003's PAPRD was enabled prematurely, and is causing some
large discrepancies on throughput and network connectivity.
For example downlink (RX) throughput against an AR9280 AP
can vary widlely from 43-73 Mbit/s while disabling this
gets AR9382 (2x2) up to around 93 Mbit/s in a 2.4 GHz HT20 setup.
Cc: stable@xxxxxxxxxx
Cc: Paul Shaw <paul.shaw@xxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hw.c | 6 +++++-
drivers/net/wireless/ath/ath9k/hw.h | 1 +
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 1afb8bb..9f01e50 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -369,6 +369,9 @@ static void ath9k_hw_init_config(struct ath_hw *ah)
else
ah->config.ht_enable = 0;
+ /* PAPRD needs some more work to be enabled */
+ ah->config.paprd_disable = 1;
+
ah->config.rx_intr_mitigation = true;
ah->config.pcieSerDesWrite = true;
@@ -1933,7 +1936,8 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
pCap->rx_status_len = sizeof(struct ar9003_rxs);
pCap->tx_desc_len = sizeof(struct ar9003_txc);
pCap->txs_len = sizeof(struct ar9003_txs);
- if (ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
+ if (!ah->config.paprd_disable &&
+ ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
} else {
pCap->tx_desc_len = sizeof(struct ath_desc);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index c2b3515..ad8c2c7 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -228,6 +228,7 @@ struct ath9k_ops_config {
u32 pcie_waen;
u8 analog_shiftreg;
u8 ht_enable;
+ u8 paprd_disable;
u32 ofdm_trig_low;
u32 ofdm_trig_high;
u32 cck_trig_high;
--
1.7.3.2.90.gd4c43
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