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Date: Fri, 29 May 2009 01:40:09 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
CC: linux-wireless@...r.kernel.org
Subject: [PATCH 3/10]: p54: Use SKB list handling helpers instead of
by-hand code.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
drivers/net/wireless/p54/p54common.c | 46 ++++++++++++++--------------------
1 files changed, 19 insertions(+), 27 deletions(-)
diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c
index 48d81d9..b618bd1 100644
--- a/drivers/net/wireless/p54/p54common.c
+++ b/drivers/net/wireless/p54/p54common.c
@@ -823,30 +823,30 @@ void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
struct p54_tx_info *range;
unsigned long flags;
- if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
+ if (unlikely(!skb || !dev || skb_queue_empty(&priv->tx_queue)))
return;
- /*
- * don't try to free an already unlinked skb
+ /* There used to be a check here to see if the SKB was on the
+ * TX queue or not. This can never happen because all SKBs we
+ * see here successfully went through p54_assign_address()
+ * which means the SKB is on the ->tx_queue.
*/
- if (unlikely((!skb->next) || (!skb->prev)))
- return;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
info = IEEE80211_SKB_CB(skb);
range = (void *)info->rate_driver_data;
- if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
+ if (!skb_queue_is_first(&priv->tx_queue, skb)) {
struct ieee80211_tx_info *ni;
struct p54_tx_info *mr;
- ni = IEEE80211_SKB_CB(skb->prev);
+ ni = IEEE80211_SKB_CB(skb_queue_prev(&priv->tx_queue, skb));
mr = (struct p54_tx_info *)ni->rate_driver_data;
}
- if (skb->next != (struct sk_buff *)&priv->tx_queue) {
+ if (!skb_queue_is_last(&priv->tx_queue, skb)) {
struct ieee80211_tx_info *ni;
struct p54_tx_info *mr;
- ni = IEEE80211_SKB_CB(skb->next);
+ ni = IEEE80211_SKB_CB(skb_queue_next(&priv->tx_queue, skb));
mr = (struct p54_tx_info *)ni->rate_driver_data;
}
__skb_unlink(skb, &priv->tx_queue);
@@ -864,15 +864,13 @@ static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev,
unsigned long flags;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
- entry = priv->tx_queue.next;
- while (entry != (struct sk_buff *)&priv->tx_queue) {
+ skb_queue_walk(&priv->tx_queue, entry) {
struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
if (hdr->req_id == req_id) {
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
return entry;
}
- entry = entry->next;
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
return NULL;
@@ -890,24 +888,22 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
int count, idx;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
- entry = (struct sk_buff *) priv->tx_queue.next;
- while (entry != (struct sk_buff *)&priv->tx_queue) {
+ skb_queue_walk(&priv->tx_queue, entry) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
struct p54_hdr *entry_hdr;
struct p54_tx_data *entry_data;
unsigned int pad = 0, frame_len;
range = (void *)info->rate_driver_data;
- if (range->start_addr != addr) {
- entry = entry->next;
+ if (range->start_addr != addr)
continue;
- }
- if (entry->next != (struct sk_buff *)&priv->tx_queue) {
+ if (!skb_queue_is_last(&priv->tx_queue, entry)) {
struct ieee80211_tx_info *ni;
struct p54_tx_info *mr;
- ni = IEEE80211_SKB_CB(entry->next);
+ ni = IEEE80211_SKB_CB(skb_queue_next(&priv->tx_queue,
+ entry));
mr = (struct p54_tx_info *)ni->rate_driver_data;
}
@@ -1168,23 +1164,21 @@ static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
}
}
- entry = priv->tx_queue.next;
- while (left--) {
+ skb_queue_walk(&priv->tx_queue, entry) {
u32 hole_size;
info = IEEE80211_SKB_CB(entry);
range = (void *)info->rate_driver_data;
hole_size = range->start_addr - last_addr;
if (!target_skb && hole_size >= len) {
- target_skb = entry->prev;
+ target_skb = skb_queue_prev(&priv->tx_queue, entry);
hole_size -= len;
target_addr = last_addr;
}
largest_hole = max(largest_hole, hole_size);
last_addr = range->end_addr;
- entry = entry->next;
}
if (!target_skb && priv->rx_end - last_addr >= len) {
- target_skb = priv->tx_queue.prev;
+ target_skb = skb_peek_tail(&priv->tx_queue);
largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
if (!skb_queue_empty(&priv->tx_queue)) {
info = IEEE80211_SKB_CB(target_skb);
@@ -2090,7 +2084,6 @@ out:
static void p54_stop(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
- struct sk_buff *skb;
mutex_lock(&priv->conf_mutex);
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
@@ -2105,8 +2098,7 @@ static void p54_stop(struct ieee80211_hw *dev)
p54_tx_cancel(dev, priv->cached_beacon);
priv->stop(dev);
- while ((skb = skb_dequeue(&priv->tx_queue)))
- kfree_skb(skb);
+ skb_queue_purge(&priv->tx_queue);
priv->cached_beacon = NULL;
priv->tsf_high32 = priv->tsf_low32 = 0;
mutex_unlock(&priv->conf_mutex);
--
1.6.3
--
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