diff options
author | Michael Buesch <mb@bu3sch.de> | 2009-09-04 20:55:00 (GMT) |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-09-08 20:31:07 (GMT) |
commit | 637dae3f637eb7dab447e74362e0dfeded775c7c (patch) | |
tree | 2589ed0c29c0b8f360e100ee0e82ad79f2df3129 /drivers | |
parent | f5d40eedb32aa9a0e226d468e1f89fb676824694 (diff) | |
download | linux-fsl-qoriq-637dae3f637eb7dab447e74362e0dfeded775c7c.tar.xz |
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/wireless/b43/dma.c | 30 | ||||
-rw-r--r-- | drivers/net/wireless/b43/dma.h | 3 | ||||
-rw-r--r-- | drivers/net/wireless/b43/pio.c | 38 | ||||
-rw-r--r-- | drivers/net/wireless/b43/pio.h | 2 |
4 files changed, 13 insertions, 60 deletions
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c index 25ced8b..a467ee2 100644 --- a/drivers/net/wireless/b43/dma.c +++ b/drivers/net/wireless/b43/dma.c @@ -856,7 +856,6 @@ struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev, } else B43_WARN_ON(1); } - spin_lock_init(&ring->lock); #ifdef CONFIG_B43_DEBUG ring->last_injected_overflow = jiffies; #endif @@ -1315,7 +1314,6 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) struct b43_dmaring *ring; struct ieee80211_hdr *hdr; int err = 0; - unsigned long flags; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); hdr = (struct ieee80211_hdr *)skb->data; @@ -1331,8 +1329,6 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) dev, skb_get_queue_mapping(skb)); } - spin_lock_irqsave(&ring->lock, flags); - B43_WARN_ON(!ring->tx); if (unlikely(ring->stopped)) { @@ -1343,7 +1339,7 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) if (b43_debug(dev, B43_DBG_DMAVERBOSE)) b43err(dev->wl, "Packet after queue stopped\n"); err = -ENOSPC; - goto out_unlock; + goto out; } if (unlikely(WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME))) { @@ -1351,7 +1347,7 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) * full, but queues not stopped. */ b43err(dev->wl, "DMA queue overflow\n"); err = -ENOSPC; - goto out_unlock; + goto out; } /* Assign the queue number to the ring (if not already done before) @@ -1365,11 +1361,11 @@ int b43_dma_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, "DMA tx mapping failure\n"); - goto out_unlock; + goto out; } ring->nr_tx_packets++; if ((free_slots(ring) < TX_SLOTS_PER_FRAME) || @@ -1381,8 +1377,7 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb) b43dbg(dev->wl, "Stopped TX ring %d\n", ring->index); } } -out_unlock: - spin_unlock_irqrestore(&ring->lock, flags); +out: return err; } @@ -1401,8 +1396,6 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev, if (unlikely(!ring)) return; - spin_lock_irq(&ring->lock); - B43_WARN_ON(!ring->tx); ops = ring->ops; while (1) { @@ -1461,8 +1454,6 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev, b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index); } } - - spin_unlock_irq(&ring->lock); } void b43_dma_get_tx_stats(struct b43_wldev *dev, @@ -1470,17 +1461,14 @@ void b43_dma_get_tx_stats(struct b43_wldev *dev, { const int nr_queues = dev->wl->hw->queues; struct b43_dmaring *ring; - unsigned long flags; int i; for (i = 0; i < nr_queues; i++) { ring = select_ring_by_priority(dev, i); - spin_lock_irqsave(&ring->lock, flags); stats[i].len = ring->used_slots / TX_SLOTS_PER_FRAME; stats[i].limit = ring->nr_slots / TX_SLOTS_PER_FRAME; stats[i].count = ring->nr_tx_packets; - spin_unlock_irqrestore(&ring->lock, flags); } } @@ -1591,22 +1579,14 @@ void b43_dma_rx(struct b43_dmaring *ring) static void b43_dma_tx_suspend_ring(struct b43_dmaring *ring) { - unsigned long flags; - - spin_lock_irqsave(&ring->lock, flags); B43_WARN_ON(!ring->tx); ring->ops->tx_suspend(ring); - spin_unlock_irqrestore(&ring->lock, flags); } static void b43_dma_tx_resume_ring(struct b43_dmaring *ring) { - unsigned long flags; - - spin_lock_irqsave(&ring->lock, flags); B43_WARN_ON(!ring->tx); ring->ops->tx_resume(ring); - spin_unlock_irqrestore(&ring->lock, flags); } void b43_dma_tx_suspend(struct b43_wldev *dev) diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h index 05dde64..f0b0838 100644 --- a/drivers/net/wireless/b43/dma.h +++ b/drivers/net/wireless/b43/dma.h @@ -2,7 +2,6 @@ #define B43_DMA_H_ #include <linux/ieee80211.h> -#include <linux/spinlock.h> #include "b43.h" @@ -244,8 +243,6 @@ struct b43_dmaring { /* The QOS priority assigned to this ring. Only used for TX rings. * This is the mac80211 "queue" value. */ u8 queue_prio; - /* Lock, only used for TX. */ - spinlock_t lock; struct b43_wldev *dev; #ifdef CONFIG_B43_DEBUG /* Maximum number of used slots. */ diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c index ce6f36e..4635baa 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) diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h index 6c174c9..a976bbd 100644 --- a/drivers/net/wireless/b43/pio.h +++ b/drivers/net/wireless/b43/pio.h @@ -70,7 +70,6 @@ struct b43_pio_txpacket { struct b43_pio_txqueue { struct b43_wldev *dev; - spinlock_t lock; u16 mmio_base; /* The device queue buffer size in bytes. */ @@ -103,7 +102,6 @@ struct b43_pio_txqueue { struct b43_pio_rxqueue { struct b43_wldev *dev; - spinlock_t lock; u16 mmio_base; /* Work to reduce latency issues on RX. */ |