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Commit 950d5b01 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by John W. Linville
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mwl8k: mwl8k_queue_work() cleanup 

Delete most of the mwl8k_work_struct fields and options, since most
of them are unused or never changed from their defaults:
- We always use priv->config_wq, so delete the wqueue argument from
  mwl8k_queue_work().
- MWL8K_WQ_SPIN and MWL8K_WQ_POST_REQUEST are never used, as all
  callers sleep for request completion, so sleep unconditionally.
- MWL8K_WQ_FREE_WORKSTRUCT is never used.
- MWL8K_WQ_TX_WAIT_EMPTY is always set, so assume it unconditionally.
- timeout_ms/txwait_attempts/tx_timeout_ms are never changed from
  their defaults, so just hardcode these in the workqueue worker.
- step is never used.
Signed-off-by: default avatarLennert Buytenhek <buytenh@marvell.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 23b33906
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Showing with 33 additions and 171 deletions
drivers/net/wireless/mwl8k.c
View file @ 950d5b01
......@@ -1113,7 +1113,7 @@ static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv,
return ndescs;
}
static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
{
struct mwl8k_priv *priv = hw->priv;
DECLARE_COMPLETION_ONSTACK(cmd_wait);
......@@ -1140,7 +1140,7 @@ static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
int newcount;
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(delay_ms));
msecs_to_jiffies(1000));
if (timeout)
return 0;
......@@ -1149,8 +1149,8 @@ static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
newcount = mwl8k_txq_busy(priv);
spin_unlock_bh(&priv->tx_lock);
printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n",
__func__, __LINE__, delay_ms, count, newcount);
printk(KERN_ERR "%s(%u) TIMEDOUT:1000ms Pend:%u-->%u\n",
__func__, __LINE__, count, newcount);
mwl8k_scan_tx_ring(priv, txinfo);
for (index = 0; index < MWL8K_TX_QUEUES; index++)
......@@ -2389,84 +2389,15 @@ struct mwl8k_work_struct {
/* Result code. */
int rc;
/*
* Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX
* flags for explanation. Defaults to MWL8K_WQ_DEFAULT_OPTIONS.
*/
u32 options;
/* Optional field. Defaults to MWL8K_CONFIG_TIMEOUT_MS. */
unsigned long timeout_ms;
/* Optional field. Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS. */
u32 txwait_attempts;
/* Optional field. Defaults to MWL8K_TXWAIT_MS. */
u32 tx_timeout_ms;
u32 step;
};
/* Flags controlling behavior of config queue requests */
/* Caller spins while waiting for completion. */
#define MWL8K_WQ_SPIN 0x00000001
/* Wait for TX queues to empty before proceeding with configuration. */
#define MWL8K_WQ_TX_WAIT_EMPTY 0x00000002
/* Queue request and return immediately. */
#define MWL8K_WQ_POST_REQUEST 0x00000004
/*
* Caller sleeps and waits for task complete notification.
* Do not use in atomic context.
*/
#define MWL8K_WQ_SLEEP 0x00000008
/* Free work struct when task is done. */
#define MWL8K_WQ_FREE_WORKSTRUCT 0x00000010
/*
* Config request is queued and returns to caller imediately. Use
* this in atomic context. Work struct is freed by mwl8k_queue_work()
* when this flag is set.
*/
#define MWL8K_WQ_QUEUE_ONLY (MWL8K_WQ_POST_REQUEST | \
MWL8K_WQ_FREE_WORKSTRUCT)
/* Default work queue behavior is to sleep and wait for tx completion. */
#define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY)
/*
* Default config request timeout. Add adjustments to make sure the
* config thread waits long enough for both tx wait and cmd wait before
* timing out.
*/
/* Time to wait for all TXQs to drain. TX Doorbell is pressed each time. */
#define MWL8K_TXWAIT_TIMEOUT_MS 1000
/* Default number of TX wait attempts. */
#define MWL8K_WQ_TXWAIT_ATTEMPTS 4
/* Total time to wait for TXQ to drain. */
#define MWL8K_TXWAIT_MS (MWL8K_TXWAIT_TIMEOUT_MS * \
MWL8K_WQ_TXWAIT_ATTEMPTS)
/* Scheduling slop. */
#define MWL8K_OS_SCHEDULE_OVERHEAD_MS 200
#define MWL8K_CONFIG_TIMEOUT_MS (MWL8K_CMD_TIMEOUT_MS + \
MWL8K_TXWAIT_MS + \
MWL8K_OS_SCHEDULE_OVERHEAD_MS)
static void mwl8k_config_thread(struct work_struct *wt)
{
struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt;
struct ieee80211_hw *hw = worker->hw;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
int iter;
spin_lock_irq(&priv->tx_lock);
priv->inconfig = true;
......@@ -2479,44 +2410,16 @@ static void mwl8k_config_thread(struct work_struct *wt)
* reconfiguration. This avoids interrupting any in-flight
* DMA transfers to the hardware.
*/
if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) {
u32 timeout;
u32 time_remaining;
u32 iter;
u32 tx_wait_attempts = worker->txwait_attempts;
time_remaining = worker->tx_timeout_ms;
if (!tx_wait_attempts)
tx_wait_attempts = 1;
timeout = worker->tx_timeout_ms/tx_wait_attempts;
if (!timeout)
timeout = 1;
iter = tx_wait_attempts;
do {
int wait_time;
if (time_remaining > timeout) {
time_remaining -= timeout;
wait_time = timeout;
} else
wait_time = time_remaining;
if (!wait_time)
wait_time = 1;
rc = mwl8k_tx_wait_empty(hw, wait_time);
if (rc)
printk(KERN_ERR "%s() txwait timeout=%ums "
"Retry:%u/%u\n", __func__, timeout,
tx_wait_attempts - iter + 1,
tx_wait_attempts);
iter = 4;
do {
rc = mwl8k_tx_wait_empty(hw);
if (rc)
printk(KERN_ERR "%s() txwait timeout=1000ms "
"Retry:%u/%u\n", __func__, 4 - iter + 1, 4);
} while (rc && --iter);
} while (rc && --iter);
rc = iter ? 0 : -ETIMEDOUT;
rc = iter ? 0 : -ETIMEDOUT;
}
if (!rc)
rc = worker->wfunc(wt);
......@@ -2525,65 +2428,39 @@ static void mwl8k_config_thread(struct work_struct *wt)
if (priv->pending_tx_pkts && priv->radio_on)
mwl8k_tx_start(priv);
spin_unlock_irq(&priv->tx_lock);
ieee80211_wake_queues(hw);
worker->rc = rc;
if (worker->options & MWL8K_WQ_SLEEP)
complete(worker->cmd_wait);
if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT)
kfree(wt);
complete(worker->cmd_wait);
}
static int mwl8k_queue_work(struct ieee80211_hw *hw,
struct mwl8k_work_struct *worker,
struct workqueue_struct *wqueue,
int (*wfunc)(struct work_struct *w))
{
struct mwl8k_priv *priv = hw->priv;
unsigned long timeout = 0;
int rc = 0;
DECLARE_COMPLETION_ONSTACK(cmd_wait);
if (!worker->timeout_ms)
worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS;
if (!worker->options)
worker->options = MWL8K_WQ_DEFAULT_OPTIONS;
if (!worker->txwait_attempts)
worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS;
if (!worker->tx_timeout_ms)
worker->tx_timeout_ms = MWL8K_TXWAIT_MS;
worker->hw = hw;
worker->cmd_wait = &cmd_wait;
worker->rc = 1;
worker->wfunc = wfunc;
INIT_WORK(&worker->wt, mwl8k_config_thread);
queue_work(wqueue, &worker->wt);
queue_work(priv->config_wq, &worker->wt);
if (worker->options & MWL8K_WQ_POST_REQUEST) {
rc = 0;
} else {
if (worker->options & MWL8K_WQ_SPIN) {
timeout = worker->timeout_ms;
while (timeout && (worker->rc > 0)) {
mdelay(1);
timeout--;
}
} else if (worker->options & MWL8K_WQ_SLEEP)
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(worker->timeout_ms));
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(10000));
if (timeout)
rc = worker->rc;
else {
cancel_work_sync(&worker->wt);
rc = -ETIMEDOUT;
}
if (timeout)
rc = worker->rc;
else {
cancel_work_sync(&worker->wt);
rc = -ETIMEDOUT;
}
return rc;
......@@ -2669,8 +2546,7 @@ static int mwl8k_start(struct ieee80211_hw *hw)
goto mwl8k_start_disable_irq;
}
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_start_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_start_wt);
kfree(worker);
if (!rc)
return rc;
......@@ -2720,8 +2596,7 @@ static void mwl8k_stop(struct ieee80211_hw *hw)
if (worker == NULL)
return;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_stop_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_stop_wt);
kfree(worker);
if (rc == -ETIMEDOUT)
printk(KERN_ERR "%s() timed out\n", __func__);
......@@ -2849,15 +2724,14 @@ static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
{
int rc = 0;
struct mwl8k_config_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->changed = changed;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_config_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_config_wt);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out.\n", __func__);
rc = -EINVAL;
......@@ -2950,7 +2824,6 @@ static void mwl8k_bss_info_changed(struct ieee80211_hw *hw,
u32 changed)
{
struct mwl8k_bss_info_changed_worker *worker;
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
int rc;
......@@ -2967,9 +2840,7 @@ static void mwl8k_bss_info_changed(struct ieee80211_hw *hw,
worker->vif = vif;
worker->info = info;
worker->changed = changed;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq,
mwl8k_bss_info_changed_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_bss_info_changed_wt);
kfree(worker);
if (rc == -ETIMEDOUT)
printk(KERN_ERR "%s() timed out\n", __func__);
......@@ -3028,7 +2899,6 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw,
unsigned int *total_flags,
u64 multicast)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_configure_filter_worker *worker;
/* Clear unsupported feature flags */
......@@ -3045,8 +2915,7 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw,
worker->total_flags = *total_flags;
worker->multicast_adr_cmd = (void *)(unsigned long)multicast;
mwl8k_queue_work(hw, &worker->header, priv->config_wq,
mwl8k_configure_filter_wt);
mwl8k_queue_work(hw, &worker->header, mwl8k_configure_filter_wt);
}
struct mwl8k_set_rts_threshold_worker {
......@@ -3072,7 +2941,6 @@ static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
int rc;
struct mwl8k_set_rts_threshold_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
......@@ -3080,9 +2948,7 @@ static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
worker->value = value;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq,
mwl8k_set_rts_threshold_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_set_rts_threshold_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
......@@ -3130,7 +2996,6 @@ static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
{
int rc;
struct mwl8k_conf_tx_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
......@@ -3138,8 +3003,7 @@ static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
worker->queue = queue;
worker->params = params;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_conf_tx_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_conf_tx_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out\n", __func__);
......@@ -3183,15 +3047,13 @@ static int mwl8k_get_stats(struct ieee80211_hw *hw,
{
int rc;
struct mwl8k_get_stats_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->stats = stats;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_get_stats_wt);
rc = mwl8k_queue_work(hw, &worker->header, mwl8k_get_stats_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
......
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