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ath9k: fix false positives in the baseband hang check by repeating the test a few times before pronouncing the hardware dead and resetting it

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22038 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2010-07-01 21:41:40 +00:00
parent c500f2eeb2
commit 7d977508b0
1 changed files with 90 additions and 0 deletions
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90
package/mac80211/patches/540-ath9k_hang_check.patch Normal file
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@ -0,0 +1,90 @@
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -428,6 +428,7 @@ int ath_beaconq_config(struct ath_softc
#define ATH_PAPRD_TIMEOUT 100 /* msecs */
+void ath_hw_check(struct work_struct *work);
void ath_paprd_calibrate(struct work_struct *work);
void ath_ani_calibrate(unsigned long data);
@@ -563,6 +564,7 @@ struct ath_softc {
spinlock_t sc_pm_lock;
struct mutex mutex;
struct work_struct paprd_work;
+ struct work_struct hw_check_work;
struct completion paprd_complete;
u32 intrstatus;
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -516,6 +516,25 @@ static void ath_node_detach(struct ath_s
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);
+ int i;
+
+ ath9k_ps_wakeup(sc);
+
+ for (i = 0; i < 3; i++) {
+ if (ath9k_hw_check_alive(sc->sc_ah))
+ goto out;
+
+ msleep(1);
+ }
+ ath_reset(sc, false);
+
+out:
+ ath9k_ps_restore(sc);
+}
+
void ath9k_tasklet(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
@@ -527,13 +546,15 @@ void ath9k_tasklet(unsigned long data)
ath9k_ps_wakeup(sc);
- if ((status & ATH9K_INT_FATAL) ||
- !ath9k_hw_check_alive(ah)) {
+ if (status & ATH9K_INT_FATAL) {
ath_reset(sc, false);
ath9k_ps_restore(sc);
return;
}
+ if (!ath9k_hw_check_alive(ah))
+ ieee80211_queue_work(sc->hw, &sc->hw_check_work);
+
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
ATH9K_INT_RXORN);
@@ -1254,6 +1275,7 @@ static void ath9k_stop(struct ieee80211_
cancel_delayed_work_sync(&sc->tx_complete_work);
cancel_work_sync(&sc->paprd_work);
+ cancel_work_sync(&sc->hw_check_work);
if (!sc->num_sec_wiphy) {
cancel_delayed_work_sync(&sc->wiphy_work);
@@ -1977,6 +1999,7 @@ static void ath9k_sw_scan_start(struct i
sc->sc_flags |= SC_OP_SCANNING;
del_timer_sync(&common->ani.timer);
cancel_work_sync(&sc->paprd_work);
+ cancel_work_sync(&sc->hw_check_work);
cancel_delayed_work_sync(&sc->tx_complete_work);
mutex_unlock(&sc->mutex);
}
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -751,6 +751,7 @@ int ath9k_init_device(u16 devid, struct
goto error_world;
}
+ INIT_WORK(&sc->hw_check_work, ath_hw_check);
INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
INIT_DELAYED_WORK(&sc->wiphy_work, ath9k_wiphy_work);