From: Sujith Manoharan <sujith@msujith.org>
To: John Linville <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Subject: [PATCH 1/3] ath9k: Fix NF calibration for single stream cards
Date: Mon, 16 Sep 2013 10:36:59 +0530 [thread overview]
Message-ID: <1379308021-20891-1-git-send-email-sujith@msujith.org> (raw)
From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Rather than using the chip ID to read only chain-0 CCA
registers and avoid reading chain-1, use the RX chainmask
instead. There are some 1-stream PCI devices based on AR9287
such as TL-WN751ND. Improper NF calibration might result in
DMA errors/timeouts.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath9k/ar9002_phy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index 7a5569b..17970d4 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -485,7 +485,7 @@ static void ar9002_hw_do_getnf(struct ath_hw *ah,
if (IS_CHAN_HT40(ah->curchan))
nfarray[3] = sign_extend32(nf, 8);
- if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
+ if (!(ah->rxchainmask & BIT(1)))
return;
nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
--
1.8.4
next reply other threads:[~2013-09-16 5:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 5:06 Sujith Manoharan [this message]
2013-09-16 5:07 ` [PATCH 2/3] ath9k: Handle FATAL interrupts correctly Sujith Manoharan
2013-09-16 5:07 ` [PATCH 3/3] ath9k: Remove incorrect diversity initialization Sujith Manoharan
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