redonkable/alistair23-linux
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ath9k_hw: disabled PAPRD for AR9003

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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@kernel.org
Cc: Paul Shaw <paul.shaw@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2011-01-20 17:47:39 -08:00 committed by John W. Linville
parent 239712ebb2
commit 6f4810101a
2 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/net/wireless/ath/ath9k/hw.c
View file

@ -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);

1
drivers/net/wireless/ath/ath9k/hw.h
View file

@ -225,6 +225,7 @@ 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;