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ath9k: Fix NF calibration for single stream cards

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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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2013-09-16 10:36:59 +05:30 committed by John W. Linville
parent 5952bd806c
commit 8a5b7ab36b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath9k/ar9002_phy.c
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@ -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);