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b43: Remove DMA/PIO queue locks

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This removes the DMA/PIO queue locks. Locking is handled by
wl->mutex now.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch
2009-09-04 22:55:00 +02:00
committed by John W. Linville
parent f5d40eedb3
commit 637dae3f63
4 changed files with 13 additions and 60 deletions
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38
drivers/net/wireless/b43/pio.c
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@@ -144,7 +144,6 @@ static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev,
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
spin_lock_init(&q->lock);
q->dev = dev;
q->rev = dev->dev->id.revision;
q->mmio_base = index_to_pioqueue_base(dev, index) +
@@ -179,7 +178,6 @@ static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev,
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
spin_lock_init(&q->lock);
q->dev = dev;
q->rev = dev->dev->id.revision;
q->mmio_base = index_to_pioqueue_base(dev, index) +
@@ -494,7 +492,6 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
struct b43_pio_txqueue *q;
struct ieee80211_hdr *hdr;
unsigned long flags;
unsigned int hdrlen, total_len;
int err = 0;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -512,20 +509,18 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
}
spin_lock_irqsave(&q->lock, flags);
hdrlen = b43_txhdr_size(dev);
total_len = roundup(skb->len + hdrlen, 4);
if (unlikely(total_len > q->buffer_size)) {
err = -ENOBUFS;
b43dbg(dev->wl, "PIO: TX packet longer than queue.\n");
goto out_unlock;
goto out;
}
if (unlikely(q->free_packet_slots == 0)) {
err = -ENOBUFS;
b43warn(dev->wl, "PIO: TX packet overflow.\n");
goto out_unlock;
goto out;
}
B43_WARN_ON(q->buffer_used > q->buffer_size);
@@ -534,7 +529,7 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
err = -EBUSY;
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
q->stopped = 1;
goto out_unlock;
goto out;
}
/* Assign the queue number to the ring (if not already done before)
@@ -548,11 +543,11 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
* anymore and must not transmit it unencrypted. */
dev_kfree_skb_any(skb);
err = 0;
goto out_unlock;
goto out;
}
if (unlikely(err)) {
b43err(dev->wl, "PIO transmission failure\n");
goto out_unlock;
goto out;
}
q->nr_tx_packets++;
@@ -564,9 +559,7 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
q->stopped = 1;
}
out_unlock:
spin_unlock_irqrestore(&q->lock, flags);
out:
return err;
}
@@ -583,8 +576,6 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
return;
B43_WARN_ON(!pack);
spin_lock_irq(&q->lock);
info = IEEE80211_SKB_CB(pack->skb);
b43_fill_txstatus_report(dev, info, status);
@@ -602,8 +593,6 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
ieee80211_wake_queue(dev->wl->hw, q->queue_prio);
q->stopped = 0;
}
spin_unlock_irq(&q->lock);
}
void b43_pio_get_tx_stats(struct b43_wldev *dev,
@@ -611,17 +600,14 @@ void b43_pio_get_tx_stats(struct b43_wldev *dev,
{
const int nr_queues = dev->wl->hw->queues;
struct b43_pio_txqueue *q;
unsigned long flags;
int i;
for (i = 0; i < nr_queues; i++) {
q = select_queue_by_priority(dev, i);
spin_lock_irqsave(&q->lock, flags);
stats[i].len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots;
stats[i].limit = B43_PIO_MAX_NR_TXPACKETS;
stats[i].count = q->nr_tx_packets;
spin_unlock_irqrestore(&q->lock, flags);
}
}
@@ -768,9 +754,9 @@ static void b43_pio_rx_work(struct work_struct *work)
bool stop;
do {
spin_lock_irq(&q->lock);
mutex_lock(&q->dev->wl->mutex);
stop = (pio_rx_frame(q) == 0);
spin_unlock_irq(&q->lock);
mutex_unlock(&q->dev->wl->mutex);
cond_resched();
if (stop)
break;
@@ -787,9 +773,6 @@ void b43_pio_rx(struct b43_pio_rxqueue *q)
static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
{
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
@@ -799,14 +782,10 @@ static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
b43_piotx_read16(q, B43_PIO_TXCTL)
| B43_PIO_TXCTL_SUSPREQ);
}
spin_unlock_irqrestore(&q->lock, flags);
}
static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
{
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
@@ -816,7 +795,6 @@ static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
b43_piotx_read16(q, B43_PIO_TXCTL)
& ~B43_PIO_TXCTL_SUSPREQ);
}
spin_unlock_irqrestore(&q->lock, flags);
}
void b43_pio_tx_suspend(struct b43_wldev *dev)