From: Chr Date: Sun, 24 Aug 2008 01:15:06 +0000 (+0200) Subject: p54: take tx_queue's lock in rx_frame_sent X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=031d10ee5a6df5aba6b4ac8bb01dd023cd5efc02;p=openwrt%2Fstaging%2Fblogic.git p54: take tx_queue's lock in rx_frame_sent 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 Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index 4a6b5363ea4b..5cd88bcb0280 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -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);