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ath9k: Fix tx struck state with paprd 

Paprd needs to be done only on active chains(not for all the chains
that hw can support). The paprd training frames which are sent
for inactive chains would be hanging on the hw queue without
getting transmitted and would make the connection so unstable.
This issue happens only with the hw which supports paprd cal(ar9003).

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2010-09-20 22:54:46 -07:00 committed by John W. Linville
parent eb7d3066cf
commit 9094537c3a
1 changed files with 4 additions and 2 deletions
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6
drivers/net/wireless/ath/ath9k/main.c
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@ -270,6 +270,7 @@ static void ath_paprd_activate(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath9k_hw_cal_data *caldata = ah->caldata;
struct ath_common *common = ath9k_hw_common(ah);
int chain;
if (!caldata || !caldata->paprd_done)
@ -278,7 +279,7 @@ static void ath_paprd_activate(struct ath_softc *sc)
ath9k_ps_wakeup(sc);
ar9003_paprd_enable(ah, false);
for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
if (!(ah->caps.tx_chainmask & BIT(chain)))
if (!(common->tx_chainmask & BIT(chain)))
continue;
ar9003_paprd_populate_single_table(ah, caldata, chain);
@ -300,6 +301,7 @@ void ath_paprd_calibrate(struct work_struct *work)
struct ieee80211_supported_band *sband = &sc->sbands[band];
struct ath_tx_control txctl;
struct ath9k_hw_cal_data *caldata = ah->caldata;
struct ath_common *common = ath9k_hw_common(ah);
int qnum, ftype;
int chain_ok = 0;
int chain;
@ -333,7 +335,7 @@ void ath_paprd_calibrate(struct work_struct *work)
ath9k_ps_wakeup(sc);
ar9003_paprd_init_table(ah);
for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
if (!(ah->caps.tx_chainmask & BIT(chain)))
if (!(common->tx_chainmask & BIT(chain)))
continue;
chain_ok = 0;