diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/calib.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/calib.h | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c index f3448a032e6f..1e8508530e98 100644 --- a/drivers/net/wireless/ath/ath9k/calib.c +++ b/drivers/net/wireless/ath/ath9k/calib.c @@ -69,6 +69,7 @@ s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan) if (chan && chan->noisefloor) { s8 delta = chan->noisefloor - + ATH9K_NF_CAL_NOISE_THRESH - ath9k_hw_get_default_nf(ah, chan); if (delta > 0) noise += delta; diff --git a/drivers/net/wireless/ath/ath9k/calib.h b/drivers/net/wireless/ath/ath9k/calib.h index 1060c19a5012..60dcb6c22db9 100644 --- a/drivers/net/wireless/ath/ath9k/calib.h +++ b/drivers/net/wireless/ath/ath9k/calib.h @@ -21,6 +21,9 @@ #define AR_PHY_CCA_FILTERWINDOW_LENGTH 5 +/* Internal noise floor can vary by about 6db depending on the frequency */ +#define ATH9K_NF_CAL_NOISE_THRESH 6 + #define NUM_NF_READINGS 6 #define ATH9K_NF_CAL_HIST_MAX 5 |