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rt2x00mac: In error case stop netdev queue, free skb and return NETDEV_TX_OK

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It is not allowed to use NETDEV_TX_BUSY in tx path anymore.

Signed-off-by: Daniel Wagner <wagi@monom.org>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Wagner 2008-07-23 19:17:01 +02:00 committed by John W. Linville
parent 8e5f3d0aaa
commit b9740c2396
1 changed files with 19 additions and 22 deletions
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41
drivers/net/wireless/rt2x00/rt2x00mac.c
View File

@ -37,6 +37,7 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
struct ieee80211_tx_info *rts_info;
struct sk_buff *skb;
int size;
int retval = 0;
if (tx_info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)
size = sizeof(struct ieee80211_cts);
@ -44,9 +45,9 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
size = sizeof(struct ieee80211_rts);
skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom);
if (!skb) {
if (unlikely(!skb)) {
WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
return NETDEV_TX_BUSY;
return -ENOMEM;
}
skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
@ -82,13 +83,13 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
frag_skb->data, size, tx_info,
(struct ieee80211_rts *)(skb->data));
if (rt2x00queue_write_tx_frame(queue, skb)) {
retval = rt2x00queue_write_tx_frame(queue, skb);
if (retval) {
dev_kfree_skb_any(skb);
WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
return NETDEV_TX_BUSY;
}
return NETDEV_TX_OK;
return retval;
}
int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
@ -106,11 +107,8 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
* Note that we can only stop the TX queues inside the TX path
* due to possible race conditions in mac80211.
*/
if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) {
ieee80211_stop_queues(hw);
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
goto exit_fail;
/*
* Determine which queue to put packet on.
@ -141,26 +139,25 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
if ((tx_info->flags & (IEEE80211_TX_CTL_USE_RTS_CTS |
IEEE80211_TX_CTL_USE_CTS_PROTECT)) &&
!rt2x00dev->ops->hw->set_rts_threshold) {
if (rt2x00queue_available(queue) <= 1) {
ieee80211_stop_queue(rt2x00dev->hw, qid);
return NETDEV_TX_BUSY;
}
if (rt2x00queue_available(queue) <= 1)
goto exit_fail;
if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) {
ieee80211_stop_queue(rt2x00dev->hw, qid);
return NETDEV_TX_BUSY;
}
if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
goto exit_fail;
}
if (rt2x00queue_write_tx_frame(queue, skb)) {
ieee80211_stop_queue(rt2x00dev->hw, qid);
return NETDEV_TX_BUSY;
}
if (rt2x00queue_write_tx_frame(queue, skb))
goto exit_fail;
if (rt2x00queue_threshold(queue))
ieee80211_stop_queue(rt2x00dev->hw, qid);
return NETDEV_TX_OK;
exit_fail:
ieee80211_stop_queue(rt2x00dev->hw, qid);
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
EXPORT_SYMBOL_GPL(rt2x00mac_tx);