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ath9k_hw: Fix radio retention for AR9462 

IQ calibration during fast channel change sometimes failed
with RTT. And also restoring invalid radio retention readings
during init cal could cause failure to set the channel properly.
This patch counts the valid rtt history readings and clears
rtt mask.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-10-20 14:29:38 +05:30 committed by John W. Linville
parent 52d6d4ef5e
commit 91ae4d0291
1 changed files with 6 additions and 2 deletions
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8
drivers/net/wireless/ath/ath9k/ar9003_calib.c
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@ -908,12 +908,15 @@ static bool ar9003_hw_rtt_restore(struct ath_hw *ah, struct ath9k_channel *chan)
int i;
bool restore;
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT) || !ah->caldata)
if (!ah->caldata)
return false;
hist = &ah->caldata->rtt_hist;
if (!hist->num_readings)
return false;
ar9003_hw_rtt_enable(ah);
ar9003_hw_rtt_set_mask(ah, 0x10);
ar9003_hw_rtt_set_mask(ah, 0x00);
for (i = 0; i < AR9300_MAX_CHAINS; i++) {
if (!(ah->rxchainmask & (1 << i)))
continue;
@ -1070,6 +1073,7 @@ skip_tx_iqcal:
if (is_reusable && (hist->num_readings < RTT_HIST_MAX)) {
u32 *table;
hist->num_readings++;
for (i = 0; i < AR9300_MAX_CHAINS; i++) {
if (!(ah->rxchainmask & (1 << i)))
continue;