This makes it much easier to add further rework to avoid race conditions
between reset and other work items.
Move other functions to make ath_reset static.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ath9k.h | 4 +-
drivers/net/wireless/ath/ath9k/beacon.c | 4 +-
drivers/net/wireless/ath/ath9k/init.c | 1 +
drivers/net/wireless/ath/ath9k/main.c | 155 ++++++++++++++++--------------
drivers/net/wireless/ath/ath9k/xmit.c | 18 +++-
5 files changed, 100 insertions(+), 82 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 5d9a9aa..bfc90e4 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -425,6 +425,7 @@ void ath9k_set_beaconing_status(struct ath_softc *sc, bool status);
#define ATH_PAPRD_TIMEOUT 100 /* msecs */
+void ath_reset_work(struct work_struct *work);
void ath_hw_check(struct work_struct *work);
void ath_hw_pll_work(struct work_struct *work);
void ath_paprd_calibrate(struct work_struct *work);
@@ -555,6 +556,7 @@ struct ath_ant_comb {
#define SC_OP_RXFLUSH BIT(7)
#define SC_OP_LED_ASSOCIATED BIT(8)
#define SC_OP_LED_ON BIT(9)
+#define SC_OP_HW_RESET BIT(10)
#define SC_OP_TSF_RESET BIT(11)
#define SC_OP_BT_PRIORITY_DETECTED BIT(12)
#define SC_OP_BT_SCAN BIT(13)
@@ -604,6 +606,7 @@ struct ath_softc {
struct mutex mutex;
struct work_struct paprd_work;
struct work_struct hw_check_work;
+ struct work_struct hw_reset_work;
struct completion paprd_complete;
unsigned int hw_busy_count;
@@ -650,7 +653,6 @@ struct ath_softc {
};
void ath9k_tasklet(unsigned long data);
-int ath_reset(struct ath_softc *sc, bool retry_tx);
int ath_cabq_update(struct ath_softc *);
static inline void ath_read_cachesize(struct ath_common *common, int *csz)
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 0c757c9..22e8e25 100644
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -386,9 +386,7 @@ void ath_beacon_tasklet(unsigned long data)
ath_dbg(common, ATH_DBG_BSTUCK,
"beacon is officially stuck\n");
sc->sc_flags |= SC_OP_TSF_RESET;
- spin_lock(&sc->sc_pcu_lock);
- ath_reset(sc, true);
- spin_unlock(&sc->sc_pcu_lock);
+ ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
}
return;
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 50da642..be302fb 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -777,6 +777,7 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc,
goto error_world;
}
+ INIT_WORK(&sc->hw_reset_work, ath_reset_work);
INIT_WORK(&sc->hw_check_work, ath_hw_check);
INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
INIT_DELAYED_WORK(&sc->hw_pll_work, ath_hw_pll_work);
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index da57b2c..36ae12a 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -236,6 +236,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
del_timer_sync(&common->ani.timer);
cancel_work_sync(&sc->paprd_work);
cancel_work_sync(&sc->hw_check_work);
+ cancel_work_sync(&sc->hw_reset_work);
cancel_delayed_work_sync(&sc->tx_complete_work);
cancel_delayed_work_sync(&sc->hw_pll_work);
@@ -596,74 +597,6 @@ static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
ath_tx_node_cleanup(sc, an);
}
-void ath_hw_check(struct work_struct *work)
-{
- struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
- struct ath_common *common = ath9k_hw_common(sc->sc_ah);
- unsigned long flags;
- int busy;
-
- ath9k_ps_wakeup(sc);
- if (ath9k_hw_check_alive(sc->sc_ah))
- goto out;
-
- spin_lock_irqsave(&common->cc_lock, flags);
- busy = ath_update_survey_stats(sc);
- spin_unlock_irqrestore(&common->cc_lock, flags);
-
- ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
- "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
- if (busy >= 99) {
- if (++sc->hw_busy_count >= 3) {
- spin_lock_bh(&sc->sc_pcu_lock);
- ath_reset(sc, true);
- spin_unlock_bh(&sc->sc_pcu_lock);
- }
- } else if (busy >= 0)
- sc->hw_busy_count = 0;
-
-out:
- ath9k_ps_restore(sc);
-}
-
-static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
-{
- static int count;
- struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-
- if (pll_sqsum >= 0x40000) {
- count++;
- if (count == 3) {
- /* Rx is hung for more than 500ms. Reset it */
- ath_dbg(common, ATH_DBG_RESET,
- "Possible RX hang, resetting");
- spin_lock_bh(&sc->sc_pcu_lock);
- ath_reset(sc, true);
- spin_unlock_bh(&sc->sc_pcu_lock);
- count = 0;
- }
- } else
- count = 0;
-}
-
-void ath_hw_pll_work(struct work_struct *work)
-{
- struct ath_softc *sc = container_of(work, struct ath_softc,
- hw_pll_work.work);
- u32 pll_sqsum;
-
- if (AR_SREV_9485(sc->sc_ah)) {
-
- ath9k_ps_wakeup(sc);
- pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
- ath9k_ps_restore(sc);
-
- ath_hw_pll_rx_hang_check(sc, pll_sqsum);
-
- ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
- }
-}
-
void ath9k_tasklet(unsigned long data)
{
@@ -676,9 +609,7 @@ void ath9k_tasklet(unsigned long data)
if ((status & ATH9K_INT_FATAL) ||
(status & ATH9K_INT_BB_WATCHDOG)) {
- spin_lock(&sc->sc_pcu_lock);
- ath_reset(sc, true);
- spin_unlock(&sc->sc_pcu_lock);
+ ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
return;
}
@@ -969,13 +900,14 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
ath9k_ps_restore(sc);
}
-int ath_reset(struct ath_softc *sc, bool retry_tx)
+static int ath_reset(struct ath_softc *sc, bool retry_tx)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
int r;
+ sc->sc_flags &= ~SC_OP_HW_RESET;
sc->hw_busy_count = 0;
ath9k_debug_samp_bb_mac(sc);
@@ -1037,6 +969,84 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
return r;
}
+void ath_reset_work(struct work_struct *work)
+{
+ struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
+
+ spin_lock_bh(&sc->sc_pcu_lock);
+ ath_reset(sc, true);
+ spin_unlock_bh(&sc->sc_pcu_lock);
+}
+
+void ath_hw_check(struct work_struct *work)
+{
+ struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ unsigned long flags;
+ int busy;
+
+ ath9k_ps_wakeup(sc);
+ if (ath9k_hw_check_alive(sc->sc_ah))
+ goto out;
+
+ spin_lock_irqsave(&common->cc_lock, flags);
+ busy = ath_update_survey_stats(sc);
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+
+ ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
+ "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
+ if (busy >= 99) {
+ if (++sc->hw_busy_count >= 3) {
+ spin_lock_bh(&sc->sc_pcu_lock);
+ ath_reset(sc, true);
+ spin_unlock_bh(&sc->sc_pcu_lock);
+ }
+
+ } else if (busy >= 0)
+ sc->hw_busy_count = 0;
+
+out:
+ ath9k_ps_restore(sc);
+}
+
+static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
+{
+ static int count;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+ if (pll_sqsum >= 0x40000) {
+ count++;
+ if (count == 3) {
+ /* Rx is hung for more than 500ms. Reset it */
+ ath_dbg(common, ATH_DBG_RESET,
+ "Possible RX hang, resetting");
+ spin_lock_bh(&sc->sc_pcu_lock);
+ ath_reset(sc, true);
+ spin_unlock_bh(&sc->sc_pcu_lock);
+ count = 0;
+ }
+ } else
+ count = 0;
+}
+
+void ath_hw_pll_work(struct work_struct *work)
+{
+ struct ath_softc *sc = container_of(work, struct ath_softc,
+ hw_pll_work.work);
+ u32 pll_sqsum;
+
+ if (AR_SREV_9485(sc->sc_ah)) {
+
+ ath9k_ps_wakeup(sc);
+ pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
+ ath9k_ps_restore(sc);
+
+ ath_hw_pll_rx_hang_check(sc, pll_sqsum);
+
+ ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
+ }
+}
+
/**********************/
/* mac80211 callbacks */
/**********************/
@@ -1229,6 +1239,7 @@ static void ath9k_stop(struct ieee80211_hw *hw)
cancel_delayed_work_sync(&sc->hw_pll_work);
cancel_work_sync(&sc->paprd_work);
cancel_work_sync(&sc->hw_check_work);
+ cancel_work_sync(&sc->hw_reset_work);
if (sc->sc_flags & SC_OP_INVALID) {
ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 49b93c2..95bc459 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -581,8 +581,10 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
rcu_read_unlock();
- if (needreset)
- ath_reset(sc, false);
+ if (needreset) {
+ sc->sc_flags |= SC_OP_HW_RESET;
+ ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
+ }
}
static bool ath_lookup_legacy(struct ath_buf *bf)
@@ -1332,7 +1334,7 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
struct ath_atx_ac *ac, *ac_tmp, *last_ac;
struct ath_atx_tid *tid, *last_tid;
- if (list_empty(&txq->axq_acq) ||
+ if ((sc->sc_flags & SC_OP_HW_RESET) || list_empty(&txq->axq_acq) ||
txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
return;
@@ -2147,6 +2149,9 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
spin_lock_bh(&txq->axq_lock);
for (;;) {
+ if (sc->sc_flags & SC_OP_HW_RESET)
+ break;
+
if (list_empty(&txq->axq_q)) {
txq->axq_link = NULL;
if (sc->sc_flags & SC_OP_TXAGGR)
@@ -2234,9 +2239,7 @@ static void ath_tx_complete_poll_work(struct work_struct *work)
if (needreset) {
ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET,
"tx hung, resetting the chip\n");
- spin_lock_bh(&sc->sc_pcu_lock);
- ath_reset(sc, true);
- spin_unlock_bh(&sc->sc_pcu_lock);
+ ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
}
ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
@@ -2269,6 +2272,9 @@ void ath_tx_edma_tasklet(struct ath_softc *sc)
int status;
for (;;) {
+ if (sc->sc_flags & SC_OP_HW_RESET)
+ break;
+
status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts);
if (status == -EINPROGRESS)
break;
--
1.7.3.2
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