From 7c5a189dc6a43def594fedc7cd8f6886596b65de Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Wed, 6 May 2009 01:47:02 +0400 Subject: [PATCH] p54: call p54_wake_free_queues on every p54_free_skb and p54_rx_frame_sent Currently queues are stopped when their length reaches their length limit, but are restarted only when the size of freed range of packet buffer is not less than the size of the largest possible packet. This causes permanent queue stop on radio visibility loss in the middle of ping series: there is plenty of room in the packet buffer, but it is never freed more than 3 (size of 'best effort' queue) * 288 (ping packet plus headers) bytes at once. Signed-off-by: Max Filippov Signed-off-by: John W. Linville --- drivers/net/wireless/p54/p54common.c | 23 ++++------------------- 1 file changed, 4 insertions(+), 19 deletions(-) diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index b8578529180..48d81d98e12 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -822,7 +822,6 @@ void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) struct ieee80211_tx_info *info; struct p54_tx_info *range; unsigned long flags; - u32 freed = 0, last_addr = priv->rx_start; if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue))) return; @@ -842,7 +841,6 @@ void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) ni = IEEE80211_SKB_CB(skb->prev); mr = (struct p54_tx_info *)ni->rate_driver_data; - last_addr = mr->end_addr; } if (skb->next != (struct sk_buff *)&priv->tx_queue) { struct ieee80211_tx_info *ni; @@ -850,16 +848,11 @@ void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) ni = IEEE80211_SKB_CB(skb->next); mr = (struct p54_tx_info *)ni->rate_driver_data; - freed = mr->start_addr - last_addr; - } else - freed = priv->rx_end - last_addr; + } __skb_unlink(skb, &priv->tx_queue); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); dev_kfree_skb_any(skb); - - if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 + - IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom) - p54_wake_free_queues(dev); + p54_wake_free_queues(dev); } EXPORT_SYMBOL_GPL(p54_free_skb); @@ -893,8 +886,6 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) struct sk_buff *entry; u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom; struct p54_tx_info *range = NULL; - u32 freed = 0; - u32 last_addr = priv->rx_start; unsigned long flags; int count, idx; @@ -908,7 +899,6 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) range = (void *)info->rate_driver_data; if (range->start_addr != addr) { - last_addr = range->end_addr; entry = entry->next; continue; } @@ -919,11 +909,8 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) ni = IEEE80211_SKB_CB(entry->next); mr = (struct p54_tx_info *)ni->rate_driver_data; - freed = mr->start_addr - last_addr; - } else - freed = priv->rx_end - last_addr; + } - last_addr = range->end_addr; __skb_unlink(entry, &priv->tx_queue); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); @@ -1010,9 +997,7 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) spin_unlock_irqrestore(&priv->tx_queue.lock, flags); out: - if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 + - IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom) - p54_wake_free_queues(dev); + p54_wake_free_queues(dev); } static void p54_rx_eeprom_readback(struct ieee80211_hw *dev, -- 2.20.1