ath9k: fix false positives in the baseband hang check by repeating the test a few times before pronouncing the hardware dead and resetting it
SVN-Revision: 22038
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1 changed files with 90 additions and 0 deletions
90
package/mac80211/patches/540-ath9k_hang_check.patch
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90
package/mac80211/patches/540-ath9k_hang_check.patch
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@ -0,0 +1,90 @@
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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -428,6 +428,7 @@ int ath_beaconq_config(struct ath_softc
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#define ATH_PAPRD_TIMEOUT 100 /* msecs */
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+void ath_hw_check(struct work_struct *work);
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void ath_paprd_calibrate(struct work_struct *work);
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void ath_ani_calibrate(unsigned long data);
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@@ -563,6 +564,7 @@ struct ath_softc {
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spinlock_t sc_pm_lock;
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struct mutex mutex;
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struct work_struct paprd_work;
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+ struct work_struct hw_check_work;
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struct completion paprd_complete;
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u32 intrstatus;
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--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -516,6 +516,25 @@ static void ath_node_detach(struct ath_s
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ath_tx_node_cleanup(sc, an);
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}
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+void ath_hw_check(struct work_struct *work)
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+{
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+ struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
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+ int i;
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+
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+ ath9k_ps_wakeup(sc);
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+
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+ for (i = 0; i < 3; i++) {
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+ if (ath9k_hw_check_alive(sc->sc_ah))
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+ goto out;
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+
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+ msleep(1);
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+ }
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+ ath_reset(sc, false);
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+
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+out:
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+ ath9k_ps_restore(sc);
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+}
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+
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void ath9k_tasklet(unsigned long data)
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{
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struct ath_softc *sc = (struct ath_softc *)data;
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@@ -527,13 +546,15 @@ void ath9k_tasklet(unsigned long data)
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ath9k_ps_wakeup(sc);
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- if ((status & ATH9K_INT_FATAL) ||
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- !ath9k_hw_check_alive(ah)) {
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+ if (status & ATH9K_INT_FATAL) {
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ath_reset(sc, false);
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ath9k_ps_restore(sc);
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return;
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}
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+ if (!ath9k_hw_check_alive(ah))
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+ ieee80211_queue_work(sc->hw, &sc->hw_check_work);
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+
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if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
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rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
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ATH9K_INT_RXORN);
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@@ -1254,6 +1275,7 @@ static void ath9k_stop(struct ieee80211_
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cancel_delayed_work_sync(&sc->tx_complete_work);
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cancel_work_sync(&sc->paprd_work);
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+ cancel_work_sync(&sc->hw_check_work);
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if (!sc->num_sec_wiphy) {
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cancel_delayed_work_sync(&sc->wiphy_work);
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@@ -1977,6 +1999,7 @@ static void ath9k_sw_scan_start(struct i
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sc->sc_flags |= SC_OP_SCANNING;
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del_timer_sync(&common->ani.timer);
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cancel_work_sync(&sc->paprd_work);
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+ cancel_work_sync(&sc->hw_check_work);
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cancel_delayed_work_sync(&sc->tx_complete_work);
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mutex_unlock(&sc->mutex);
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}
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--- a/drivers/net/wireless/ath/ath9k/init.c
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+++ b/drivers/net/wireless/ath/ath9k/init.c
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@@ -751,6 +751,7 @@ int ath9k_init_device(u16 devid, struct
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goto error_world;
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}
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+ INIT_WORK(&sc->hw_check_work, ath_hw_check);
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INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
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INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
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INIT_DELAYED_WORK(&sc->wiphy_work, ath9k_wiphy_work);
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