From 753f1e0a1b142d08f2d9212843c275fbc62ffa51 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 20 Jan 2011 17:47:39 -0800 Subject: [PATCH] ath9k_hw: disabled PAPRD for AR9003 commit 6f4810101a629b31b5427872a09ea092cfc5c4bd upstream. 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: Paul Shaw Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath9k/hw.c | 6 +++++- drivers/net/wireless/ath/ath9k/hw.h | 1 + 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index c7fbe25cc128..5dcf14005576 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -385,6 +385,9 @@ 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; @@ -1949,7 +1952,8 @@ 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 d47d1b4b6002..1240376e29bd 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -215,6 +215,7 @@ 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; -- 2.39.5