From 1230cb83f46731ca4eaa57c480788ed3c9d05935 Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Sun, 6 Jan 2008 23:38:34 +0100 Subject: [PATCH] rt2x00: Always call ieee80211_stop_queue() when return NETDEV_TX_BUSY Apparently it was possible that ieee80211_stop_queue() was not full while NETDEV_TX_BUSY was being reported back. I think that is what causing the WARN_ON(). This moves all calls to ieee80211_stop_queue() in rt2x00mac.c where it is easier to determine if the queue should be halted. Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00mac.c | 17 +++++++++++++---- drivers/net/wireless/rt2x00/rt2x00pci.c | 8 +------- drivers/net/wireless/rt2x00/rt2x00usb.c | 8 +------- 3 files changed, 15 insertions(+), 18 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c index bae4442..1ab2fb6c 100644 --- a/drivers/net/wireless/rt2x00/rt2x00mac.c +++ b/drivers/net/wireless/rt2x00/rt2x00mac.c @@ -84,7 +84,7 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb, */ if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) { ieee80211_stop_queues(hw); - return 0; + return NETDEV_TX_OK; } /* @@ -110,15 +110,24 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb, if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) && (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS | IEEE80211_TXCTL_USE_CTS_PROTECT))) { - if (rt2x00_ring_free(ring) <= 1) + if (rt2x00_ring_free(ring) <= 1) { + ieee80211_stop_queue(rt2x00dev->hw, control->queue); return NETDEV_TX_BUSY; + } - if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control)) + if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control)) { + ieee80211_stop_queue(rt2x00dev->hw, control->queue); return NETDEV_TX_BUSY; + } } - if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) + if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) { + ieee80211_stop_queue(rt2x00dev->hw, control->queue); return NETDEV_TX_BUSY; + } + + if (rt2x00_ring_full(ring)) + ieee80211_stop_queue(rt2x00dev->hw, control->queue); if (rt2x00dev->ops->lib->kick_tx_queue) rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue); diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c index 4833808..804a998 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.c +++ b/drivers/net/wireless/rt2x00/rt2x00pci.c @@ -86,10 +86,8 @@ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev, struct skb_desc *desc; u32 word; - if (rt2x00_ring_full(ring)) { - ieee80211_stop_queue(rt2x00dev->hw, control->queue); + if (rt2x00_ring_full(ring)) return -EINVAL; - } rt2x00_desc_read(txd, 0, &word); @@ -99,7 +97,6 @@ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev, "Arrived at non-free entry in the non-full queue %d.\n" "Please file bug report to %s.\n", control->queue, DRV_PROJECT); - ieee80211_stop_queue(rt2x00dev->hw, control->queue); return -EINVAL; } @@ -119,9 +116,6 @@ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev, rt2x00_ring_index_inc(ring); - if (rt2x00_ring_full(ring)) - ieee80211_stop_queue(rt2x00dev->hw, control->queue); - return 0; } EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index 9778fae..fa0cdd8 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -179,17 +179,14 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev, struct skb_desc *desc; u32 length; - if (rt2x00_ring_full(ring)) { - ieee80211_stop_queue(rt2x00dev->hw, control->queue); + if (rt2x00_ring_full(ring)) return -EINVAL; - } if (test_bit(ENTRY_OWNER_NIC, &entry->flags)) { ERROR(rt2x00dev, "Arrived at non-free entry in the non-full queue %d.\n" "Please file bug report to %s.\n", control->queue, DRV_PROJECT); - ieee80211_stop_queue(rt2x00dev->hw, control->queue); return -EINVAL; } @@ -229,9 +226,6 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev, rt2x00_ring_index_inc(ring); - if (rt2x00_ring_full(ring)) - ieee80211_stop_queue(rt2x00dev->hw, control->queue); - return 0; } EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); -- 2.7.4