From 47ab3840a389ff1b9959734995123e5bc94c3443 Mon Sep 17 00:00:00 2001 From: Larry Finger Date: Wed, 8 Jul 2009 08:33:02 -0500 Subject: p54: tx refused but queue active In the mainline kernel, p54usb will fail because the TX queue length can become < 0. This problem has been reported as Bugzilla #13725. The failure is expressed by the following message in the logs: WARNING: at net/mac80211/tx.c:1325 ieee80211_tx+0x23c/0x298 [mac80211]() Hardware name: HP Pavilion dv2700 Notebook PC tx refused but queue active This problem has been recently observed in the wireless-testing tree, where a full solution is being tested. That fix is too invasive for 2.6.31-rcX, but the simple change supplied here will prevent the failure. Signed-off-by: Larry Finger Signed-off-by: John W. Linville --- drivers/net/wireless/p54/p54common.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index 48d81d98e12d..22ca122bd798 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -912,13 +912,14 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) } __skb_unlink(entry, &priv->tx_queue); - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); frame_len = entry->len; entry_hdr = (struct p54_hdr *) entry->data; entry_data = (struct p54_tx_data *) entry_hdr->data; - priv->tx_stats[entry_data->hw_queue].len--; + if (priv->tx_stats[entry_data->hw_queue].len) + priv->tx_stats[entry_data->hw_queue].len--; priv->stats.dot11ACKFailureCount += payload->tries - 1; + spin_unlock_irqrestore(&priv->tx_queue.lock, flags); /* * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are -- cgit v1.2.2