diff options
| author | Stanislaw Gruszka <stf_xl@wp.pl> | 2013-10-05 18:15:33 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-10-10 13:49:28 -0400 |
| commit | fdbdd25c47ac1db04a161308dfb1060869eba982 (patch) | |
| tree | 6dc88a9b1c9e4fbca723c822d99a40339f9cffee | |
| parent | 733aec6a5bd39ba34ddd0568b7f7394aec2541fb (diff) | |
rt2x00: do not pause queue on flush
Pausing queue on flush make no sense since txdone procedure un-pause
queue. Before flush procedure we have to assure queue is stopped,
i.e. on receive path h/w RX is disabled, on transmit path queue is
disabled in mac80211. That conditions are true except one function:
rt2x00usb_watchdog_tx_dma(), so add stop/start queue there.
Note stop/start queue can be racy if we do this from multiple paths,
but currently we stop TX queues only on rt2x00lib_disable_radio(),
which also stop/sync watchdog, hance we have no race condition.
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.c | 37 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00usb.c | 2 |
2 files changed, 8 insertions, 31 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 6c8a33b6ee22..218e3206ce1b 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -1033,38 +1033,21 @@ EXPORT_SYMBOL_GPL(rt2x00queue_stop_queue); void rt2x00queue_flush_queue(struct data_queue *queue, bool drop) { - bool started; bool tx_queue = (queue->qid == QID_AC_VO) || (queue->qid == QID_AC_VI) || (queue->qid == QID_AC_BE) || (queue->qid == QID_AC_BK); - mutex_lock(&queue->status_lock); /* - * If the queue has been started, we must stop it temporarily - * to prevent any new frames to be queued on the device. If - * we are not dropping the pending frames, the queue must - * only be stopped in the software and not the hardware, - * otherwise the queue will never become empty on its own. + * If we are not supposed to drop any pending + * frames, this means we must force a start (=kick) + * to the queue to make sure the hardware will + * start transmitting. */ - started = test_bit(QUEUE_STARTED, &queue->flags); - if (started) { - /* - * Pause the queue - */ - rt2x00queue_pause_queue(queue); - - /* - * If we are not supposed to drop any pending - * frames, this means we must force a start (=kick) - * to the queue to make sure the hardware will - * start transmitting. - */ - if (!drop && tx_queue) - queue->rt2x00dev->ops->lib->kick_queue(queue); - } + if (!drop && tx_queue) + queue->rt2x00dev->ops->lib->kick_queue(queue); /* * Check if driver supports flushing, if that is the case we can @@ -1080,14 +1063,6 @@ void rt2x00queue_flush_queue(struct data_queue *queue, bool drop) if (unlikely(!rt2x00queue_empty(queue))) rt2x00_warn(queue->rt2x00dev, "Queue %d failed to flush\n", queue->qid); - - /* - * Restore the queue to the previous status - */ - if (started) - rt2x00queue_unpause_queue(queue); - - mutex_unlock(&queue->status_lock); } EXPORT_SYMBOL_GPL(rt2x00queue_flush_queue); diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index 88289873c0cf..4e121627925d 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -523,7 +523,9 @@ static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n", queue->qid); + rt2x00queue_stop_queue(queue); rt2x00queue_flush_queue(queue, true); + rt2x00queue_start_queue(queue); } static int rt2x00usb_dma_timeout(struct data_queue *queue) |