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p54: take tx_queue's lock in rx_frame_sent

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p54_rx_frame_sent will alter the tx_queue. Therefore we should hold
the lock to protect against concurrent p54_assign_address calls.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Chr 2008-08-24 03:15:06 +02:00 committed by John W. Linville
parent 154e3af17f
commit 031d10ee5a
1 changed files with 7 additions and 1 deletions
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8
drivers/net/wireless/p54/p54common.c
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@ -432,7 +432,9 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
struct memrecord *range = NULL;
u32 freed = 0;
u32 last_addr = priv->rx_start;
unsigned long flags;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
while (entry != (struct sk_buff *)&priv->tx_queue) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
range = (void *)info->driver_data;
@ -453,6 +455,8 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
last_addr = range->end_addr;
__skb_unlink(entry, &priv->tx_queue);
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
memset(&info->status, 0, sizeof(info->status));
entry_hdr = (struct p54_control_hdr *) entry->data;
entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
@ -470,12 +474,14 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
info->status.ack_signal = le16_to_cpu(payload->ack_rssi);
skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
ieee80211_tx_status_irqsafe(dev, entry);
break;
goto out;
} else
last_addr = range->end_addr;
entry = entry->next;
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
out:
if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
sizeof(struct p54_control_hdr))
p54_wake_free_queues(dev);