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ath9k_hw: restrict valid nf readings for AR9271 to -114

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Noisefloor values read on AR9271 are unreliable if they
are less than -114, set those statically to -116.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@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:
Sujith 2010-03-17 14:25:20 +05:30 committed by John W. Linville
parent 6398dc039d
commit 2cbfaea485
1 changed files with 8 additions and 0 deletions
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8
drivers/net/wireless/ath/ath9k/calib.c
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@ -101,6 +101,10 @@ static void ath9k_hw_do_getnf(struct ath_hw *ah,
nf = 0 - ((nf ^ 0x1ff) + 1);
ath_print(common, ATH_DBG_CALIBRATE,
"NF calibrated [ctl] [chain 0] is %d\n", nf);
if (AR_SREV_9271(ah) && (nf >= -114))
nf = -116;
nfarray[0] = nf;
if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {
@ -139,6 +143,10 @@ static void ath9k_hw_do_getnf(struct ath_hw *ah,
nf = 0 - ((nf ^ 0x1ff) + 1);
ath_print(common, ATH_DBG_CALIBRATE,
"NF calibrated [ext] [chain 0] is %d\n", nf);
if (AR_SREV_9271(ah) && (nf >= -114))
nf = -116;
nfarray[3] = nf;
if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {