b43: Remove DMA/PIO queue locks

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>

1 files changed, 8 insertions, 30 deletions

diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index ce6f36eb88c..4635baa9b99 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -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)