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mwl8k: Handle watchdog event with highest prioriry

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Currently, command path waits till all the tx host queues
are empty. Whenever watchdog event is raised, firmware
expects driver to destroy ampdu queues immediately.

This requires corresponding commands i.e.
mwl8k_cmd_get_watchdog_bitmap and mwl8k_destroy_ba to be
sent without waiting for the tx queues to be completely
empty.

Use "watchdog_event_pending" to ensure the above mentioned
two commands are sent down immediately.

Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Yogesh Ashok Powar 2013-01-03 13:24:19 +05:30 committed by John W. Linville
parent cfacba12f5
commit c27a54d3f1
1 changed files with 19 additions and 0 deletions
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19
drivers/net/wireless/mwl8k.c
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@ -213,6 +213,8 @@ struct mwl8k_priv {
int fw_mutex_depth;
struct completion *hostcmd_wait;
atomic_t watchdog_event_pending;
/* lock held over TX and TX reap */
spinlock_t tx_lock;
@ -1527,6 +1529,9 @@ static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
return -EBUSY;
}
if (atomic_read(&priv->watchdog_event_pending))
return 0;
/*
* The TX queues are stopped at this point, so this test
* doesn't need to take ->tx_lock.
@ -1548,6 +1553,14 @@ static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
spin_unlock_bh(&priv->tx_lock);
timeout = wait_for_completion_timeout(&tx_wait,
msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
if (atomic_read(&priv->watchdog_event_pending)) {
spin_lock_bh(&priv->tx_lock);
priv->tx_wait = NULL;
spin_unlock_bh(&priv->tx_lock);
return 0;
}
spin_lock_bh(&priv->tx_lock);
if (timeout) {
@ -3645,6 +3658,7 @@ static void mwl8k_watchdog_ba_events(struct work_struct *work)
spin_unlock(&priv->stream_lock);
done:
atomic_dec(&priv->watchdog_event_pending);
status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
@ -4346,6 +4360,10 @@ static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
}
if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
atomic_inc(&priv->watchdog_event_pending);
status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
}
@ -5520,6 +5538,7 @@ static int mwl8k_probe_hw(struct ieee80211_hw *hw)
priv->sniffer_enabled = false;
priv->wmm_enabled = false;
priv->pending_tx_pkts = 0;
atomic_set(&priv->watchdog_event_pending, 0);
rc = mwl8k_rxq_init(hw, 0);
if (rc)