Return-path: Received: from nbd.name ([46.4.11.11]:50085 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755972Ab0KVOjt (ORCPT ); Mon, 22 Nov 2010 09:39:49 -0500 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: linville@tuxdriver.com, lrodriguez@atheros.com Subject: [PATCH] ath9k_hw: fix A-MPDU key search issues on AR9003 Date: Mon, 22 Nov 2010 15:39:39 +0100 Message-Id: <1290436779-85434-1-git-send-email-nbd@openwrt.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: Under load, a large number of frames can produce decryption errors, even when no key cache update is being done. Performing a key search for every single frame in an A-MPDU improves reliability. Signed-off-by: Felix Fietkau --- drivers/net/wireless/ath/ath9k/hw.c | 4 ++++ drivers/net/wireless/ath/ath9k/reg.h | 1 + 2 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 1dbe53b..3b69046 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1829,6 +1829,10 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah) ah->misc_mode |= AR_PCU_MIC_NEW_LOC_ENA; + /* enable key search for every frame in an aggregate */ + if (AR_SREV_9300_20_OR_LATER(ah)) + ah->misc_mode |= AR_PCU_ALWAYS_PERFORM_KEYSEARCH; + pCap->low_2ghz_chan = 2312; pCap->high_2ghz_chan = 2732; diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h index 443407d..f1bbc75 100644 --- a/drivers/net/wireless/ath/ath9k/reg.h +++ b/drivers/net/wireless/ath/ath9k/reg.h @@ -1575,6 +1575,7 @@ enum { #define AR_PCU_TBTT_PROTECT 0x00200000 #define AR_PCU_CLEAR_VMF 0x01000000 #define AR_PCU_CLEAR_BA_VALID 0x04000000 +#define AR_PCU_ALWAYS_PERFORM_KEYSEARCH 0x10000000 #define AR_PCU_BT_ANT_PREVENT_RX 0x00100000 #define AR_PCU_BT_ANT_PREVENT_RX_S 20 -- 1.7.3.2