redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

mwl8k: Handle watchdog event with highest prioriry

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/net/wireless/mwl8k.c
View file

@ -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)