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openwrt/package/mac80211/patches/530-ath9k_locking_fix.patch

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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -309,7 +309,6 @@ struct ath_rx {
u8 rxotherant;
u32 *rxlink;
unsigned int rxfilter;
- spinlock_t rxflushlock;
spinlock_t rxbuflock;
struct list_head rxbuf;
struct ath_descdma rxdma;
@@ -599,9 +598,9 @@ struct ath_softc {
struct ath_hw *sc_ah;
void __iomem *mem;
int irq;
- spinlock_t sc_resetlock;
spinlock_t sc_serial_rw;
spinlock_t sc_pm_lock;
+ spinlock_t sc_pcu_lock;
struct mutex mutex;
struct work_struct paprd_work;
struct work_struct hw_check_work;
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -228,6 +228,8 @@ int ath_set_channel(struct ath_softc *sc
ath9k_ps_wakeup(sc);
+ spin_lock_bh(&sc->sc_pcu_lock);
+
/*
* This is only performed if the channel settings have
* actually changed.
@@ -239,6 +241,7 @@ int ath_set_channel(struct ath_softc *sc
*/
ath9k_hw_disable_interrupts(ah);
ath_drain_all_txq(sc, false);
+
stopped = ath_stoprecv(sc);
/* XXX: do not flush receive queue here. We don't want
@@ -257,18 +260,14 @@ int ath_set_channel(struct ath_softc *sc
channel->center_freq, conf_is_ht40(conf),
fastcc);
- spin_lock_bh(&sc->sc_resetlock);
-
r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset channel (%u MHz), "
"reset status %d\n",
channel->center_freq, r);
- spin_unlock_bh(&sc->sc_resetlock);
goto ps_restore;
}
- spin_unlock_bh(&sc->sc_resetlock);
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
@@ -287,6 +286,8 @@ int ath_set_channel(struct ath_softc *sc
}
ps_restore:
+ spin_unlock_bh(&sc->sc_pcu_lock);
+
ath9k_ps_restore(sc);
return r;
}
@@ -600,6 +601,8 @@ void ath9k_tasklet(unsigned long data)
return;
}
+ spin_lock_bh(&sc->sc_pcu_lock);
+
if (!ath9k_hw_check_alive(ah))
ieee80211_queue_work(sc->hw, &sc->hw_check_work);
@@ -610,15 +613,12 @@ void ath9k_tasklet(unsigned long data)
rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
if (status & rxmask) {
- spin_lock_bh(&sc->rx.rxflushlock);
-
/* Check for high priority Rx first */
if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
(status & ATH9K_INT_RXHP))
ath_rx_tasklet(sc, 0, true);
ath_rx_tasklet(sc, 0, false);
- spin_unlock_bh(&sc->rx.rxflushlock);
}
if (status & ATH9K_INT_TX) {
@@ -644,6 +644,8 @@ void ath9k_tasklet(unsigned long data)
/* re-enable hardware interrupt */
ath9k_hw_enable_interrupts(ah);
+
+ spin_unlock_bh(&sc->sc_pcu_lock);
ath9k_ps_restore(sc);
}
@@ -871,12 +873,13 @@ void ath_radio_enable(struct ath_softc *
int r;
ath9k_ps_wakeup(sc);
+ spin_lock_bh(&sc->sc_pcu_lock);
+
ath9k_hw_configpcipowersave(ah, 0, 0);
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, sc->hw);
- spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
@@ -884,15 +887,14 @@ void ath_radio_enable(struct ath_softc *
"reset status %d\n",
channel->center_freq, r);
}
- spin_unlock_bh(&sc->sc_resetlock);
ath_update_txpow(sc);
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
+ spin_unlock_bh(&sc->sc_pcu_lock);
return;
}
-
if (sc->sc_flags & SC_OP_BEACONS)
ath_beacon_config(sc, NULL); /* restart beacons */
@@ -905,6 +907,8 @@ void ath_radio_enable(struct ath_softc *
ath9k_hw_set_gpio(ah, ah->led_pin, 0);
ieee80211_wake_queues(hw);
+ spin_unlock_bh(&sc->sc_pcu_lock);
+
ath9k_ps_restore(sc);
}
@@ -915,6 +919,8 @@ void ath_radio_disable(struct ath_softc
int r;
ath9k_ps_wakeup(sc);
+ spin_lock_bh(&sc->sc_pcu_lock);
+
ieee80211_stop_queues(hw);
/*
@@ -930,13 +936,13 @@ void ath_radio_disable(struct ath_softc
ath9k_hw_disable_interrupts(ah);
ath_drain_all_txq(sc, false); /* clear pending tx frames */
+
ath_stoprecv(sc); /* turn off frame recv */
ath_flushrecv(sc); /* flush recv queue */
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, hw);
- spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
if (r) {
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
@@ -944,11 +950,14 @@ void ath_radio_disable(struct ath_softc
"reset status %d\n",
channel->center_freq, r);
}
- spin_unlock_bh(&sc->sc_resetlock);
ath9k_hw_phy_disable(ah);
+
ath9k_hw_configpcipowersave(ah, 1, 1);
+
+ spin_unlock_bh(&sc->sc_pcu_lock);
ath9k_ps_restore(sc);
+
ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
}
@@ -962,19 +971,20 @@ int ath_reset(struct ath_softc *sc, bool
/* Stop ANI */
del_timer_sync(&common->ani.timer);
+ spin_lock_bh(&sc->sc_pcu_lock);
+
ieee80211_stop_queues(hw);
ath9k_hw_disable_interrupts(ah);
ath_drain_all_txq(sc, retry_tx);
+
ath_stoprecv(sc);
ath_flushrecv(sc);
- spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
if (r)
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d\n", r);
- spin_unlock_bh(&sc->sc_resetlock);
if (ath_startrecv(sc) != 0)
ath_print(common, ATH_DBG_FATAL,
@@ -1004,6 +1014,7 @@ int ath_reset(struct ath_softc *sc, bool
}
ieee80211_wake_queues(hw);
+ spin_unlock_bh(&sc->sc_pcu_lock);
/* Start ANI */
ath_start_ani(common);
@@ -1142,17 +1153,16 @@ static int ath9k_start(struct ieee80211_
* be followed by initialization of the appropriate bits
* and then setup of the interrupt mask.
*/
- spin_lock_bh(&sc->sc_resetlock);
+ spin_lock_bh(&sc->sc_pcu_lock);
r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d "
"(freq %u MHz)\n", r,
curchan->center_freq);
- spin_unlock_bh(&sc->sc_resetlock);
+ spin_unlock_bh(&sc->sc_pcu_lock);
goto mutex_unlock;
}
- spin_unlock_bh(&sc->sc_resetlock);
/*
* This is needed only to setup initial state
@@ -1171,8 +1181,10 @@ static int ath9k_start(struct ieee80211_
ath_print(common, ATH_DBG_FATAL,
"Unable to start recv logic\n");
r = -EIO;
+ spin_unlock_bh(&sc->sc_pcu_lock);
goto mutex_unlock;
}
+ spin_unlock_bh(&sc->sc_pcu_lock);
/* Setup our intr mask. */
ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
@@ -1367,6 +1379,8 @@ static void ath9k_stop(struct ieee80211_
ath9k_btcoex_timer_pause(sc);
}
+ spin_lock_bh(&sc->sc_pcu_lock);
+
/* make sure h/w will not generate any interrupt
* before setting the invalid flag. */
ath9k_hw_disable_interrupts(ah);
@@ -1381,6 +1395,9 @@ static void ath9k_stop(struct ieee80211_
/* disable HAL and put h/w to sleep */
ath9k_hw_disable(ah);
ath9k_hw_configpcipowersave(ah, 1, 1);
+
+ spin_unlock_bh(&sc->sc_pcu_lock);
+
ath9k_ps_restore(sc);
/* Finally, put the chip in FULL SLEEP mode */
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -297,19 +297,17 @@ static void ath_edma_start_recv(struct a
ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_LP,
sc->rx.rx_edma[ATH9K_RX_QUEUE_LP].rx_fifo_hwsize);
- spin_unlock_bh(&sc->rx.rxbuflock);
-
ath_opmode_init(sc);
ath9k_hw_startpcureceive(sc->sc_ah, (sc->sc_flags & SC_OP_OFFCHANNEL));
+
+ spin_unlock_bh(&sc->rx.rxbuflock);
}
static void ath_edma_stop_recv(struct ath_softc *sc)
{
- spin_lock_bh(&sc->rx.rxbuflock);
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP);
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP);
- spin_unlock_bh(&sc->rx.rxbuflock);
}
int ath_rx_init(struct ath_softc *sc, int nbufs)
@@ -319,7 +317,7 @@ int ath_rx_init(struct ath_softc *sc, in
struct ath_buf *bf;
int error = 0;
- spin_lock_init(&sc->rx.rxflushlock);
+ spin_lock_init(&sc->sc_pcu_lock);
sc->sc_flags &= ~SC_OP_RXFLUSH;
spin_lock_init(&sc->rx.rxbuflock);
@@ -506,9 +504,9 @@ int ath_startrecv(struct ath_softc *sc)
ath9k_hw_rxena(ah);
start_recv:
- spin_unlock_bh(&sc->rx.rxbuflock);
ath_opmode_init(sc);
ath9k_hw_startpcureceive(ah, (sc->sc_flags & SC_OP_OFFCHANNEL));
+ spin_unlock_bh(&sc->rx.rxbuflock);
return 0;
}
@@ -518,6 +516,7 @@ bool ath_stoprecv(struct ath_softc *sc)
struct ath_hw *ah = sc->sc_ah;
bool stopped;
+ spin_lock_bh(&sc->rx.rxbuflock);
ath9k_hw_stoppcurecv(ah);
ath9k_hw_setrxfilter(ah, 0);
stopped = ath9k_hw_stopdmarecv(ah);
@@ -526,19 +525,18 @@ bool ath_stoprecv(struct ath_softc *sc)
ath_edma_stop_recv(sc);
else
sc->rx.rxlink = NULL;
+ spin_unlock_bh(&sc->rx.rxbuflock);
return stopped;
}
void ath_flushrecv(struct ath_softc *sc)
{
- spin_lock_bh(&sc->rx.rxflushlock);
sc->sc_flags |= SC_OP_RXFLUSH;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
ath_rx_tasklet(sc, 1, false);
sc->sc_flags &= ~SC_OP_RXFLUSH;
- spin_unlock_bh(&sc->rx.rxflushlock);
}
static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -592,7 +592,6 @@ static int ath9k_init_softc(u16 devid, s
spin_lock_init(&common->cc_lock);
spin_lock_init(&sc->wiphy_lock);
- spin_lock_init(&sc->sc_resetlock);
spin_lock_init(&sc->sc_serial_rw);
spin_lock_init(&sc->sc_pm_lock);
mutex_init(&sc->mutex);
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1142,13 +1142,11 @@ void ath_drain_all_txq(struct ath_softc
ath_print(common, ATH_DBG_FATAL,
"Failed to stop TX DMA. Resetting hardware!\n");
- spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
if (r)
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d\n",
r);
- spin_unlock_bh(&sc->sc_resetlock);
}
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
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