diff options
| author | Denis 'GNUtoo' Carikli <GNUtoo@no-log.org> | 2010-08-27 23:48:19 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-08-31 14:20:40 -0400 |
| commit | 9df86e2e702c6d5547aced7f241addd2d698bb11 (patch) | |
| tree | 694c4e2a933148800639cad6818284aa439e6dbf /drivers/net/wireless/wl12xx/wl1251_tx.c | |
| parent | 391a200a89bf85bd38f117f34898c24299e3d53d (diff) | |
wl1251: Fix queue stopping/waking for TX path
This patch was adapted from 06f7bc7db79fabe6b2ec16eff0f59e4acc21eb72
(from linus's linux-2.6 tree of kernel.org)
here's the original message:
The queue stopping/waking functionality was broken in a way that could
cause huge latencies in TX transfers and even cause the TX to stall in the
right circumstances. Correct these problems.
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_tx.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1251_tx.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_tx.c b/drivers/net/wireless/wl12xx/wl1251_tx.c index 6d618fb1fd95..388492a7f41f 100644 --- a/drivers/net/wireless/wl12xx/wl1251_tx.c +++ b/drivers/net/wireless/wl12xx/wl1251_tx.c @@ -320,11 +320,6 @@ void wl1251_tx_work(struct work_struct *work) ret = wl1251_tx_frame(wl, skb); if (ret == -EBUSY) { - /* firmware buffer is full, stop queues */ - wl1251_debug(DEBUG_TX, "tx_work: fw buffer full, " - "stop queues"); - ieee80211_stop_queues(wl->hw); - wl->tx_queue_stopped = true; skb_queue_head(&wl->tx_queue, skb); goto out; } else if (ret < 0) { @@ -447,6 +442,7 @@ void wl1251_tx_complete(struct wl1251 *wl) { int i, result_index, num_complete = 0; struct tx_result result[FW_TX_CMPLT_BLOCK_SIZE], *result_ptr; + unsigned long flags; if (unlikely(wl->state != WL1251_STATE_ON)) return; @@ -475,6 +471,20 @@ void wl1251_tx_complete(struct wl1251 *wl) } } + if (wl->tx_queue_stopped + && + skb_queue_len(&wl->tx_queue) <= WL1251_TX_QUEUE_LOW_WATERMARK){ + + /* firmware buffer has space, restart queues */ + wl1251_debug(DEBUG_TX, "tx_complete: waking queues"); + spin_lock_irqsave(&wl->wl_lock, flags); + ieee80211_wake_queues(wl->hw); + wl->tx_queue_stopped = false; + spin_unlock_irqrestore(&wl->wl_lock, flags); + ieee80211_queue_work(wl->hw, &wl->tx_work); + + } + /* Every completed frame needs to be acknowledged */ if (num_complete) { /* |