This is a note to let you know that I've just added the patch titled
ath9k_hw: disabled PAPRD for AR9003
to the 2.6.36-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ath9k_hw-disabled-paprd-for-ar9003.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6f4810101a629b31b5427872a09ea092cfc5c4bd Mon Sep 17 00:00:00 2001
From: Luis R. Rodriguez <[email protected]>
Date: Thu, 20 Jan 2011 17:47:39 -0800
Subject: ath9k_hw: disabled PAPRD for AR9003
From: Luis R. Rodriguez <[email protected]>
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 <[email protected]>
Signed-off-by: Luis R. Rodriguez <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/ath/ath9k/hw.c | 6 +++++-
drivers/net/wireless/ath/ath9k/hw.h | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -387,6 +387,9 @@ static void ath9k_hw_init_config(struct
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;
@@ -2264,7 +2267,8 @@ int ath9k_hw_fill_cap_info(struct ath_hw
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);
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -240,6 +240,7 @@ 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;
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.36/ath9k-move-the-pcu-lock-to-the-sc-structure.patch
queue-2.6.36/ath9k-fix-assumptions-for-idle-calls-on-suspend-resume.patch
queue-2.6.36/ath9k_hw-disabled-paprd-for-ar9003.patch
queue-2.6.36/ath9k-simplify-hw-reset-locking.patch
queue-2.6.36/ath9k-fix-aphy-wiphy-idle-mismatch.patch
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